{"id":975,"date":"2015-12-29T14:27:44","date_gmt":"2015-12-29T14:27:44","guid":{"rendered":"http:\/\/haisins.epac.to\/wordpress\/?p=975"},"modified":"2015-12-29T14:27:44","modified_gmt":"2015-12-29T14:27:44","slug":"ntp","status":"publish","type":"post","link":"https:\/\/haisins.synology.me\/wordpress\/?p=975","title":{"rendered":"NTP"},"content":{"rendered":"

\uac1c\uc694: NTP <\/SPAN><\/FONT>\uc815\ubcf4\uc640 \uc124\uce58<\/FONT><\/SPAN><\/B><\/P>
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\uc138\ubd80 \uc124\uba85:<\/SPAN><\/FONT><\/SPAN><\/P>
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\ucc28\ub840<\/FONT><\/SPAN><\/P>
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___________________<\/FONT><\/SPAN><\/P>
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1. NTP <\/SPAN>\uac1c\ub150<\/SPAN><\/FONT><\/P>
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2. NTP <\/FONT><\/SPAN>\uc11c\ubc84 \uc124\uce58 – <\/SPAN><\/FONT>\uc6b4\uc601 \ubaa8\ub4dc \uc120\ud0dd<\/FONT><\/SPAN><\/P>
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3. NTP <\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8 \uc124\uce58<\/SPAN><\/FONT><\/P>
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4. ntpdate <\/SPAN>\uba85\ub839\uc758 \uc0ac\uc6a9<\/SPAN><\/FONT><\/P>
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5. ntpq <\/SPAN>\uba85\ub839\uc758 \uc0ac\uc6a9<\/SPAN><\/FONT><\/P>
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6. <\/SPAN>\uc720\uc6a9\ud55c \ub514\ubc84\uadf8 \uc635\uc158<\/SPAN><\/FONT><\/P>
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7. <\/SPAN>\uc77c\ubc18\uc801\uc778 \ubb38\uc81c\uc640 \uc54c\ub824\uc9c4 \ubc84\uadf8<\/SPAN><\/FONT><\/P>
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8. NTP<\/SPAN>\uc5d0 \ub300\ud55c \ucd94\uac00 \uc790\ub8cc<\/SPAN><\/FONT><\/P>
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1. NTP <\/SPAN>\uac1c\ub150<\/SPAN><\/FONT><\/P>
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_____________<\/FONT><\/SPAN><\/P>
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NTP<\/SPAN>\ub294 \ucef4\ud4e8\ud130 \ud074\ub77c\uc774\uc5b8\ud2b8\ub098 \uc11c\ubc84\uc758 \uc2dc\uac04\uc744 \ub2e4\ub978 \uc11c\ubc84\ub098 \ub77c\ub514\uc624 \ub610\ub294 \uc704\uc131 \uc218\uc2e0\uae30\uc640 \uac19\uc740 \ucc38\uc870\ud560 \uc218 \uc788\ub294 \ud0c0\uc784 \uc18c\uc2a4 \ub610\ub294 \ubaa8\ub380\uc5d0 \ub3d9\uae30\ud654\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
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Coordinated Universal Time(UTC)<\/FONT><\/SPAN>\uc5d0 \ub3d9\uae30\ud654\ub41c \ud504\ub77c\uc774\uba38\ub9ac \uc11c\ubc84\uc640 \uad00\ub828\ud558\uc5ec, NTP<\/SPAN><\/FONT>\ub294 \ub300\uac1c<\/FONT> LAN <\/FONT><\/SPAN>\uc0c1\uc5d0\uc11c\ub294<\/FONT> 1 ms <\/FONT><\/SPAN>\uc774\ub0b4<\/FONT>, WAN <\/FONT><\/SPAN>\uc0c1\uc5d0\uc11c\ub294<\/FONT> 10ms <\/FONT><\/SPAN>\uc774\ub0b4\uc758 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc815\ud655\uc131\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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NTP<\/SPAN>\ub97c \uc8fc \uc11c\ubc84\uc5d0 \uc801\uc6a9\ud558\ub824\uba74 \ub77c\ub514\uc624\ub098 \uc704\uc131 \uc218\uc2e0\uae30 \ub610\ub294 \ubaa8\ub380\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
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\uc2dc\uac04\uc740 NTP <\/SPAN><\/FONT>\uc11c\ubc84 \uacc4\uce35\uc744 \ud1b5\ud574 \ubd84\ubc30\ub418\ub294 \ub370<\/FONT>, <\/FONT><\/SPAN>\uac01 \uc11c\ubc84\ub294 \ud30c\uc77c\uc758 \ucd5c\uc0c1\ub2e8\uc5d0 \uc704\uce58\ud558\uace0 \ub77c\ub514\uc624 \ud074\ub7ed\uacfc \uac19\uc740 \uc678\ubd80 \ud0c0\uc784 \uc18c\uc2a4<\/FONT>(<\/FONT><\/SPAN>\ub300\uac1c \ub77c\ub514\uc624 \ud074\ub7ed<\/FONT>)<\/FONT><\/SPAN>\uc5d0 \ub300\ud55c \uc561\uc138\uc2a4\ub97c \uac16\uace0 \uc788\ub294<\/FONT> Primary(stratum 1) <\/FONT><\/SPAN>\uc11c\ubc84\ub97c \ucc44\ud0dd\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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stratum-2 <\/FONT><\/SPAN>\uc11c\ubc84\ub294 stratum-1 <\/SPAN><\/FONT>\uc11c\ubc84\ub85c\ubd80\ud130 \uc2dc\uac04\uc744 \uc5bb\uace0<\/FONT>, stratum-3 <\/FONT><\/SPAN>\uc11c\ubc84\ub294<\/FONT> stratum 2 <\/FONT><\/SPAN>\uc11c\ubc84\ub85c\ubd80\ud130 \uc2dc\uac04\uc744 \uc5bb\ub294 \uc2dd\uc73c\ub85c \uc9c4\ud589\ub429\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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\ub3d9\uae30\ud654 \ub8e8\ud504\uac00 \uc7a5\uae30\ud654\ub418\ub294 \uac83\uc744 \ud53c\ud558\ub824\uba74 strata<\/SPAN><\/FONT>\uc758 \uc218\ub97c<\/FONT> 15<\/FONT><\/SPAN>\ub85c \uc81c\ud55c\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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\ub124\ud2b8\uc6cc\ud06c\uac00 \uaca9\ub9ac\ub418\uc5b4 \uc788\uc5b4\uc11c \uc778\ud130\ub137\uc744 \ud1b5\ud574 \ub2e4\ub978 \uc0ac\uc6a9\uc790<br<\/SPAN><\/FONT>\uc758 \uc11c\ubc84\uc5d0 \uc811\uadfc\ud560 \uc218 \uc5c6\ub294 \uacbd\uc6b0<\/FONT>, <\/FONT><\/SPAN>\ub77c\ub514\uc624 \ud074\ub7ed\uc744 \uad6c\uc785\ud558\uba74 \uc88b\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ub2e4\ub978 \ubc29\ubc95\uc740<\/FONT>, <\/FONT><\/SPAN>\uc54c\ub824\uc9c4 \ud504\ub77c\uc774\uba38\ub9ac \ub610\ub294 \uc138\ucee8\ub354\ub9ac<\/FONT> NTP <\/FONT><\/SPAN>\uc11c\ubc84 \uc911 \ud558\ub098\uc5d0 \ub9de\ucd94\uc5b4 \uc11c\ubc84\ub97c \uad6c\uc131\ud558\ub294 \uac83\uc785\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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\ub3d9\uae30\ud654 \uc11c\ube0c\ub137\uc758 \uac01 \ud074\ub77c\uc774\uc5b8\ud2b8(<\/SPAN><\/FONT>\uc11c\ubc84 \uc790\uccb4\uc77c \uc218\ub3c4 \uc788\uc74c<\/FONT>)<\/FONT><\/SPAN>\ub294 \uc0ac\uc6a9 \uac00\ub2a5\ud55c \uc11c\ubc84 \uc911 \uc815\ud655\ud788 \ud558\ub098\ub9cc\uc744 \uc120\ud0dd\ud558\uc5ec \ub3d9\uae30\ud654\ud558\ub294\ub370<\/FONT>, <\/FONT><\/SPAN>\ub300\uac1c\uc758 \uacbd\uc6b0 \uc790\uc2e0\uc774 \uc811\uadfc\ud560 \uc218 \uc788\ub294 \ucd5c\ud558\uc704<\/FONT> stratum <\/FONT><\/SPAN>\uc11c\ubc84 \uc911\uc5d0\uc11c \ud0dd\ud558\uac8c \ub429\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc774\uac83\uc740 \ucd5c\uc801\uc758 \uad6c\uc131\uc774\ub77c \ud560 \uc218 \uc5c6\uc73c\ubbc0\ub85c<\/FONT> NTP<\/FONT><\/SPAN>\ub294 \ub2e4\ub978 \uc804\uc81c \ud558\uc5d0\uc11c\ub3c4 \uc6b4\uc601\ub429\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ub2e4\uc2dc \ub9d0\ud558\uba74<\/FONT>, <\/FONT><\/SPAN>\uac01 \uc11c\ubc84\uc758 \uc2dc\uac04\uc740 \ub2e4\uc18c \ubd80\uc815\ud655\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc2e4\uc81c\ub85c<\/FONT> NTP<\/FONT><\/SPAN>\ub294 \ubcf4\ub2e4 \ub0ae\uc740 \uc2a4\ud2b8\ub77c\ud140\uc758 \uc5ec\ub7ec \uc2dc\uac04 \uc18c\uc2a4<\/FONT>(<\/FONT><\/SPAN>\ucd5c\uc18c \uc138 \uad70\ub370<\/FONT>)<\/FONT><\/SPAN>\uc5d0 \uc811\uadfc\ud558\ub824\uace0 \ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc774\ub807\uac8c \ud558\uba74 \uacc4\uc57d \uc54c\uace0\ub9ac\uc998\uc744 \uc801\uc6a9\ud558\uc5ec \uc774\ub4e4 \uc911 \uc5b4\ub290 \ud55c \uacf3\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \uc774\uc0c1 \ud604\uc0c1\uc744 \ud0d0\uc9c0\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc77c\ubc18\uc801\uc73c\ub85c \ubaa8\ub4e0 \uc11c\ubc84\uac00 \uacc4\uc57d \ud558\uc5d0 \uc788\uc744 \uacbd\uc6b0<\/FONT>, NTP<\/FONT><\/SPAN>\ub294 \uc120\ud0dd\ud560 \uc11c\ubc84\uac00 \ucd5c\ud558\uc704<\/FONT> stratum <\/FONT><\/SPAN>\uc778\uc9c0<\/FONT>, <\/FONT><\/SPAN>\uac00\uc7a5 \uac00\uae4c\uc6b4 \uac83\uc778\uc9c0<\/FONT>(<\/FONT><\/SPAN>\ub124\ud2b8\uc6cc\ud06c \uc9c0\uc5f0 \uce21\uba74\uc5d0\uc11c<\/FONT>), <\/FONT><\/SPAN>\uadf8\ub9ac\uace0 \uc815\ubc00\uc131\uc774 \uc788\ub294\uc9c0 \ub4f1\uc758 \uc694\uac74\uacfc \ub2e4\ub978 \uace0\ub824\uc0ac\ud56d\uc744 \uac10\uc548\ud558\uba70 \uc774\ub4e4 \uc911 \ucd5c\uc120\uc758 \uc11c\ubc84\ub97c \uc120\ud0dd\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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\ub9c8\uc9c0\ub9c9\uc73c\ub85c, <\/SPAN><\/FONT>\uc5f0\uad00 \ubaa8\ub4dc\uc758 \ubb38\uc81c\uac00 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uac01 \uc11c\ubc84 \uac04\uc758 \uc5f0\uad00\uc5d0 \ub530\ub77c \uc120\ud0dd \uac00\ub2a5\ud55c \uc5ec\ub7ec \uac00\uc9c0 \ubaa8\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc5f0\uad00\uc744<\/FONT> symmetric-active <\/FONT><\/SPAN>\ubaa8\ub4dc\ub85c \uad6c\uc131\ud558\uba74<\/FONT>(<\/FONT><\/SPAN>\uc77c\ubc18\uc801\uc73c\ub85c \uad6c\uc131 \ud30c\uc77c\uc5d0\uc11c<\/FONT> peer declaration<\/FONT><\/SPAN>\uc73c\ub85c \ud45c\uc2dc\ub428<\/FONT>), <\/FONT><\/SPAN>\ud544\uc694\uc5d0 \ub530\ub77c \uc6d0\uaca9 \uc11c\ubc84\ub85c\ubd80\ud130 \uc2dc\uac04\uc744 \uc5bb\uace0<\/FONT>, <\/FONT><\/SPAN>\uc6d0\uaca9 \uc11c\ubc84\uc5d0\uac8c \uc2dc\uac04\uc744 \uc81c\uacf5\ud558\uace0\uc790 \ud55c\ub2e4\ub294 \uac83\uc744 \uc6d0\uaca9 \uc11c\ubc84\uc5d0 \uc9c0\uc2dc\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc774 \ubaa8\ub4dc\ub294 \ub2e4\uc591\ud55c \ub124\ud2b8\uc6cc\ud06c \uacbd\ub85c\ub97c \ud1b5\ud574 \uc0c1\ud638 \uc5f0\uacb0\ub41c \ub2e4\uc218\uc758 \uc911\ubcf5\ub41c \uc2dc\uac04 \uc11c\ubc84\uac00 \uad00\ub828\ub41c \uad6c\uc131\uc5d0 \uc801\ud569\ud558\uba70<\/FONT>, <\/FONT><\/SPAN>\uc624\ub298\ub0a0 \uc778\ud130\ub137 \uc0c1\uc5d0\uc11c \uc6b4\uc601\ub418\ub294 \ub300\ubd80\ubd84\uc758<\/FONT> stratum – 1 <\/FONT><\/SPAN>\ubc0f<\/FONT> stratum – 2 <\/FONT><\/SPAN>\uc11c\ubc84\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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\uc5f0\uad00\uc744 \ud074\ub77c\uc774\uc5b8\ud2b8 \ubaa8\ub4dc\ub85c \uad6c\uc131\ud558\uba74(<\/SPAN><\/FONT>\uc77c\ubc18\uc801\uc73c\ub85c \uad6c\uc131 \ud30c\uc77c\uc5d0\uc11c<\/FONT> server declaration<\/FONT><\/SPAN>\uc73c\ub85c \ud45c\uc2dc\ub428<\/FONT>), <\/FONT><\/SPAN>\uc0ac\uc6a9\uc790\uac00 \uc6d0\uaca9 \uc11c\ubc84\ub85c\ubd80\ud130 \uc2dc\uac04\uc744 \uc5bb\uc73c\ub824 \ud558\uc9c0\ub9cc \uc6d0\uaca9 \uc11c\ubc84\uc5d0 \uc2dc\uac04\uc744 \uacf5\uae09\ud558\ub824 \ud558\uc9c0 \uc54a\ub294 \uacbd\uc6b0\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc774 \ubaa8\ub4dc\ub294 \ub2e4\ub978 \ub85c\uceec \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c \ub3d9\uae30\ud654\ub97c \uc81c\uacf5\ud558\uc9c0 \uc54a\ub294 \ud30c\uc77c \uc11c\ubc84\uc640 \uc6cc\ud06c\uc2a4\ud14c\uc774\uc158 \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0 \uc801\ud569\ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc815\ud655\uc131\uacfc \uc2e0\ub8b0\uc131 \uc694\uac74\uc774 \uc5c4\uaca9\ud558\uc9c0 \uc54a\uc740 \uacbd\uc6b0<\/FONT>, broadcast<\/FONT><\/SPAN>\ub098<\/FONT> multicast <\/FONT><\/SPAN>\ubaa8\ub4dc\ub97c \uc0ac\uc6a9\ud558\ub3c4\ub85d \ud074\ub77c\uc774\uc5b8\ud2b8\ub97c \uad6c\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ucd5c\uace0\uc758 \uc815\ud655\uc131\uacfc \uc2e0\ub8b0\uc131\uc774 \uc694\uad6c\ub418\ub294 \uacbd\uc6b0<\/FONT>, <\/FONT><\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8\uc640 \uc11c\ubc84\ub294 \uac01\uac01 \ud074\ub77c\uc774\uc5b8\ud2b8\ub098 \uc11c\ubc84 \ub610\ub294 \ub300\uce6d \ubaa8\ub4dc\ub85c \uc6b4\uc601\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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2. NTP server <\/SPAN>\uc124\uce58<\/SPAN><\/FONT><\/P>
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___________________________<\/FONT><\/SPAN><\/P>
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1. <\/FONT><\/SPAN>\ub2e4\uc74c\uacfc \uac19\uc774 \/etc\/inet\/ntp.server<\/SPAN><\/FONT>\ub97c<\/FONT> \/etc\/inet\/ntp.conf<\/FONT><\/SPAN>\ub85c \ubcf5\uc0ac\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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# cp \/etc\/inet\/ntp.server \/etc\/inet\/ntp.conf<\/FONT><\/SPAN><\/P>
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2. ntp.conf <\/SPAN>\ud30c\uc77c\uc744 \ud3b8\uc9d1\ud558\uc2ed\uc2dc\uc624.<\/SPAN><\/SPAN><\/FONT><\/P>
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\uc774 \ud30c\uc77c\uc5d0\ub294 \uba85\ud655\ud55c \uc124\uba85\uc744 \uc704\ud574 \ub9ce\uc740 \ucf54\uba58\ud2b8\ub97c \ucd94\uac00\ud588\uc2b5\ub2c8\ub2e4.<\/SPAN><\/FONT><\/SPAN><\/P>
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\uae30\ubcf8 \ud30c\uc77c\uc5d0\ub294 \ucf54\uba58\ud2b8\uac00 \ub9ce\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/SPAN><\/FONT><\/SPAN><\/P>
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#—– start of ntp.conf file ———————<\/FONT><\/SPAN><\/P>
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# @(#)ntp.server        <\/SPAN><\/FONT>1.4<\/FONT>     <\/FONT><\/SPAN>97\/05\/05 SMI<\/FONT><\/SPAN><\/P>
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#<\/FONT><\/SPAN><\/P>
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# \/etc\/inet\/ntp.server<\/FONT><\/SPAN><\/P>
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#<\/FONT><\/SPAN><\/P>
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# \/etc\/inet\/ntp.conf<\/SPAN>\ub85c \ubcf5\uc0ac\ud574\uc11c \ud3b8\uc9d1\ud560 \uc218 \uc788\ub294 \uc608\uc81c \ud30c\uc77c\uc785\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
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# <\/SPAN>\uc774 \ud30c\uc77c\uc740 \uc678\ubd80 \ud558\ub4dc\uc6e8\uc5b4 \ud074\ub7ed\uc5d0 \ub530\ub77c \ub85c\uceec \ud074\ub7ed\uc744 \ub3d9\uae30\ud654\ud558\uace0<\/SPAN><\/FONT><\/P>
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# NTP <\/SPAN>\uba40\ud2f0\uce90\uc2a4\ud2b8 \ub124\ud2b8\uc6cc\ud06c \uc0c1\uc5d0\uc11c<\/SPAN><\/FONT><\/P>
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# <\/SPAN>\uc790\uc2e0\uc744 \ubc1c\ud45c\ud558\ub294 \uc11c\ubc84\ub97c \uc704\ud55c \uad6c\uc131 \ud0ec\ud50c\ub9bf\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
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#<\/FONT><\/SPAN><\/P>
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# <\/FONT><\/SPAN>\ub2e4\uc74c \ud074\ub7ed \uc7a5\uce58\uc5d0 \ub300\ud574\uc11c\ub294 RFC 1305<\/SPAN><\/FONT>\ub97c \ucc38\uc870\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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# <\/FONT><\/SPAN>\uc774\uac83\uc740 \uc678\ubd80 \ud074\ub7ed \uc7a5\uce58\uc785\ub2c8\ub2e4. <\/SPAN><\/FONT>\ub2e4\uc74c \uc7a5\uce58\ub4e4\uc740<\/FONT><\/SPAN><\/P>
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# xntpd 3.4y<\/SPAN>\uc5d0 \uc758\ud574 \uc778\uc2dd\ub429\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
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#<\/FONT><\/SPAN><\/P>
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# XType <\/FONT><\/SPAN>\uc7a5\uce58     <\/SPAN><\/SPAN><\/FONT>\uc774\ub984<\/FONT>                    <\/FONT><\/SPAN><\/SPAN>\uc124\uba85<\/FONT><\/SPAN><\/P>
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# ——————————————————-<\/FONT><\/SPAN><\/P>
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# 1    <\/SPAN><\/FONT>(none)<\/FONT>     <\/FONT><\/SPAN>LOCAL<\/FONT>                  <\/FONT><\/SPAN>Undisciplined Local Clock<\/FONT><\/SPAN><\/P>
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# 2    <\/SPAN><\/FONT>trak<\/FONT>         <\/FONT><\/SPAN>GPS_TRAK<\/FONT>            <\/FONT><\/SPAN>TRAK 8820 GPS Receiver<\/FONT><\/SPAN><\/P>
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# 3    <\/SPAN><\/FONT>pst<\/FONT>          <\/FONT><\/SPAN>WWV_PST<\/FONT>             <\/FONT><\/SPAN>PSTI\/Traconex WWV\/WWVH Receiver<\/FONT><\/SPAN><\/P>
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# 4    <\/SPAN><\/FONT>wwvb<\/FONT>   <\/SPAN>   <\/SPAN><\/FONT>WWVB_SPEC<\/FONT>         <\/FONT><\/SPAN>Spectracom WWVB Receiver<\/FONT><\/SPAN><\/P>
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# 5    <\/SPAN><\/FONT>goes<\/FONT>      <\/FONT><\/SPAN>GPS_GOES_TRUE<\/FONT>  <\/FONT><\/SPAN>TrueTime GPS\/GOES Receivers<\/FONT><\/SPAN><\/P>
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# 6    <\/SPAN><\/FONT>irig<\/FONT>          <\/FONT><\/SPAN>IRIG_AUDIO<\/FONT>            <\/FONT><\/SPAN>IRIG Audio Decoder<\/FONT><\/SPAN><\/P>
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# 7    <\/SPAN><\/FONT>chu<\/FONT>        <\/FONT><\/SPAN>CHU<\/FONT>                        <\/FONT><\/SPAN>Scratchbuilt CHU Receiver<\/FONT><\/SPAN><\/P>
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# 8    <\/SPAN><\/FONT>refclock- GENERIC<\/FONT>               <\/FONT><\/SPAN>Generic Reference Clock Driver<\/FONT><\/SPAN><\/P>
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# 9    <\/SPAN><\/FONT>gps<\/FONT>         <\/FONT><\/SPAN>GPS_MX4200<\/FONT>         <\/FONT><\/SPAN>Magnavox MX4200 GPS Receiver<\/FONT><\/SPAN><\/P>
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# 10   <\/SPAN><\/FONT>gps<\/FONT>        <\/FONT><\/SPAN>GPS_AS2201<\/FONT>         <\/FONT><\/SPAN>Austron 2201A GPS Receiver<\/FONT><\/SPAN><\/P>
\n

# 11   <\/SPAN><\/FONT>omega<\/FONT>   <\/FONT><\/SPAN>OMEGA_TRUE<\/FONT>       <\/FONT><\/SPAN>TrueTime OM-DC OMEGA Receiver<\/FONT><\/SPAN><\/P>
\n

# 12   <\/SPAN><\/FONT>tpro<\/FONT>        <\/FONT><\/SPAN>IRIG_TPRO<\/FONT>            <\/FONT><\/SPAN>KSI\/Odetics TPRO\/S IRIG Interface<\/FONT><\/SPAN><\/P>
\n

# 13   <\/SPAN><\/FONT>leitch<\/FONT>      <\/FONT><\/SPAN>ATOM_LEITCH<\/FONT>       <\/FONT><\/SPAN>Leitch CSD 5300 Master Clock Controller<\/FONT><\/SPAN><\/P>
\n

# 14   <\/SPAN><\/FONT>ees<\/FONT>        <\/FONT><\/SPAN>MSF_EES<\/FONT>              <\/FONT><\/SPAN>EES M201 MSF Receiver<\/FONT><\/SPAN><\/P>
\n

# 15   <\/SPAN><\/FONT>gpstm<\/FONT>     <\/FONT><\/SPAN>GPS_TRUE<\/FONT>           <\/FONT><\/SPAN>TrueTime GPS\/TM-TMD Receiver<\/FONT><\/SPAN><\/P>
\n

# 17   <\/SPAN><\/FONT>datum<\/FONT>     <\/FONT><\/SPAN>GPS_DATUM<\/FONT>         <\/FONT><\/SPAN>Datum Precision Time System<\/FONT><\/SPAN><\/P>
\n

# 18   <\/SPAN><\/FONT>acts<\/FONT>        <\/FONT><\/SPAN>NIST_ACTS<\/FONT>           <\/FONT><\/SPAN>NIST Automated Computer Time Service<\/FONT><\/SPAN><\/P>
\n

# 19   <\/SPAN><\/FONT>heath<\/FONT>      <\/FONT><\/SPAN>WWV_HEATH<\/FONT>        <\/FONT><\/SPAN>Heath WWV\/WWVH Receiver<\/FONT><\/SPAN><\/P>
\n

# 20   <\/SPAN><\/FONT>nmea<\/FONT>      <\/FONT><\/SPAN>GPS_NMEA<\/FONT>          <\/FONT><\/SPAN>Generic NMEA GPS Receiver<\/FONT><\/SPAN><\/P>
\n

# 22   <\/SPAN><\/FONT>pps<\/FONT>        <\/FONT><\/SPAN>ATOM_PPS<\/FONT>           <\/FONT><\/SPAN>PPS Clock Discipline<\/FONT><\/SPAN><\/P>
\n

# 23   <\/SPAN><\/FONT>ptbacts<\/FONT>   <\/FONT><\/SPAN>PTB_ACTS<\/FONT>           <\/FONT><\/SPAN>PTB Automated Computer Time Service<\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN><\/P>
\n

# <\/FONT><\/SPAN>\uc77c\ubd80 \uc7a5\uce58\ub294 “fudge” <\/SPAN><\/FONT>\uc778\uc790\uc758 \ud61c\ud0dd\uc744 \ubc1b\uc2b5\ub2c8\ub2e4<\/FONT>. xntpd<\/FONT><\/SPAN><\/SPAN><\/P>
\n

# <\/SPAN>\ubb38\uc11c\ub97c \ucc38\uc870\ud558\uc2ed\uc2dc\uc624.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# <\/FONT><\/SPAN>\ud53c\uc5b4 \ub610\ub294 \uc11c\ubc84\uc785\ub2c8\ub2e4<\/FONT>.  <\/SPAN><\/FONT>“XType”<\/FONT><\/SPAN>\uc744<\/FONT><\/SPAN><\/P>
\n

# <\/SPAN>\uc704 \ud14c\uc774\ube14\uc758 \uac12\uc73c\ub85c \uad50\uccb4\ud558\uc2ed\uc2dc\uc624.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

#<\/SPAN>\ub85c\uceec \ud074\ub7ed \uc7a5\uce58\ub97c \ucd94\uac00\ud558\ub294 \uacbd\uc6b0,<\/SPAN><\/SPAN><\/FONT><\/P>
\n

#<\/SPAN>\ud574\ub2f9 \ub4dc\ub77c\uc774\ubc84\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \uc9c0\uce68\uc5d0 \uc758\ud574 \uc2dd\ubcc4\ub429\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

#<\/FONT><\/SPAN>\uc11c\ubc84 127.127.XX.0<\/SPAN><\/FONT>\uc5d0\uc11c<\/FONT> 127.127<\/FONT><\/SPAN>\ub294<\/FONT> NTP<\/FONT><\/SPAN>\uc5d0\uac8c \uc774\uac83\uc740 \uc6d0\uaca9 \ub124\ud2b8\uc6cc\ud06c \ud53c\uc5b4\uac00 \uc544\ub2cc<\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN>\ub85c\uceec\uc784\uc744 \uc9c0\uc2dc\ud558\uace0, XX<\/SPAN><\/FONT>\ub294<\/FONT> NTP distribution<\/FONT><\/SPAN>\uc5d0\uc11c \uc124\uba85\ub41c<\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN>\ud074\ub7ed \uc720\ud615\uc774\ub77c\ub294 \uac83\uc744 \uc9c0\uc2dc\ud569\ub2c8\ub2e4. <\/SPAN><\/FONT>\uc774\ub7ec\ud55c<\/FONT> config file<\/FONT><\/SPAN>\uc758 \uc81c\ud55c \uc9c0\uce68\uc740<\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN>\uc774 \ud638\uc2a4\ud2b8\uac00 \uc9c0\uc815\ub41c \ub450 IP <\/SPAN><\/FONT>\uc8fc\uc18c\uc5d0\ub9cc \uc774\uc57c\uae30\ub97c \ud558\uba70<\/FONT><\/SPAN><\/P>
\n

#<\/SPAN>\uadf8 \ubc16\uc758 \ub2e4\ub978 \uacf3\uc740 \uc2e0\ub8b0\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uc5b4\ub514\uc5d0\ub3c4<\/SPAN><\/FONT><\/P>
\n

#<\/SPAN>\uc2dc\uac04\uc744 \uc81c\uacf5\ud558\uc9c0 \uc54a\ub294\ub2e4\uace0 \uc124\uba85\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

#<\/SPAN>\ub2e4\uc74c \uc138 \uc904\uc740 \uae30\ubcf8\uac12\uc73c\ub85c \uc81c\uacf5\ub418\ub294 \uac83\uc774\uace0 \uc0ac\uc6a9\uc790\uc758 \uc124\uce58\uc5d0 \ub9de\ucd94\uc5b4 \ubcc0\uacbd\ud558\uc2ed\uc2dc\uc624.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

server 127.127.XType.0 prefer<\/FONT><\/SPAN><\/P>
\n

fudge 127.127.XType.0 stratum 0<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

broadcast 224.0.1.1 ttl 4<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

#<\/SPAN>\uc138 \uac00\uc9c0 \uc720\ud615\uc758 \uc2dc\uac04 \uc11c\ubc84<\/SPAN><\/FONT><\/P>
\n

# 1. peer host_address [ key # ] [ version # ] [ prefer ]<\/FONT><\/SPAN><\/P>
\n

#       <\/SPAN><\/SPAN>\ub85c\uceec \uc11c\ubc84\uac00 \ud638\uc2a4\ud2b8 \uc8fc\uc18c\ub85c\uc11c \uc9c0\uc815\ub41c \uc6d0\uaca9 \uc11c\ubc84\uc640<\/SPAN><\/FONT><\/P>
\n

#       <\/SPAN><\/FONT><\/SPAN>\ud568\uaed8 symmetric active <\/SPAN><\/FONT>\ubaa8\ub4dc\ub85c \uc6b4\uc601\ub41c\ub2e4\ub294 \uac83\uc744 \uc9c0\uc815\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

#       <\/SPAN><\/FONT><\/SPAN>\uc989, <\/SPAN><\/FONT>\ub85c\uceec \uc11c\ubc84\ub294 \uc6d0\uaca9 \uc11c\ubc84\uc5d0 \ub9de\ucd94\uc5b4 \ub3d9\uae30\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

# 2. server host_address [ key # ] [ version # ] [ prefer ] [ mode # ] server<\/FONT><\/SPAN><\/P>
\n

#       <\/SPAN><\/FONT><\/SPAN>\ub85c\uceec \uc11c\ubc84\uac00 command<\/SPAN><\/FONT>\uc5d0\uc11c \uc774\ub984\uc774 \uc9c0\uc815\ub41c<\/FONT><\/SPAN><\/P>
\n

#        <\/SPAN><\/FONT><\/SPAN>\uc6d0\uaca9 \uc11c\ubc84\uc640 \ud568\uaed8 “client” <\/SPAN><\/FONT>\ubaa8\ub4dc\ub85c \uc6b4\uc601\ub41c\ub2e4\ub294 \uac83\uc744<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT><\/SPAN>\uc9c0\uc815\ud569\ub2c8\ub2e4. <\/SPAN><\/FONT>\uc774 \ubaa8\ub4dc\uc5d0\uc11c \ub85c\uceec \uc11c\ubc84\ub294 \uc6d0\uaca9 \uc11c\ubc84\uc5d0 \ub9de\ucd94\uc5b4<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT><\/SPAN>\ub3d9\uae30\ud654\ub420 \uc218 \uc788\uc9c0\ub9cc, <\/SPAN><\/FONT>\uc6d0\uaca9 \uc11c\ubc84\ub294<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/SPAN>\ub85c\uceec \uc11c\ubc84\uc5d0 \ub3d9\uae30\ud654\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

# 3. broadcast host_address [ key # ] [ version # ] [ ttl # ]<\/FONT><\/SPAN><\/P>
\n

#     <\/SPAN>  <\/SPAN><\/FONT><\/SPAN>\ub85c\uceec \uc11c\ubc84\uac00 “broadcast” <\/SPAN><\/FONT>\ubaa8\ub4dc\ub85c \uc6b4\uc601\ub41c\ub2e4\ub294 \uac83\uc744<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT><\/SPAN>\uc9c0\uc815\ud569\ub2c8\ub2e4. <\/SPAN><\/FONT>\uc774 \ubaa8\ub4dc\uc5d0\uc11c \ub85c\uceec \uc11c\ubc84\ub294<\/FONT> command<\/FONT><\/SPAN>\uc5d0\uc11c<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT><\/SPAN>\uc9c0\uc815\ub41c broadcast\/multicast <\/SPAN><\/FONT>\uc8fc\uc18c\uc758 \ud074\ub77c\uc774\uc5b8\ud2b8 \ubb34\ub9ac\uc5d0\uac8c<\/FONT><\/SPAN><\/P>
\n

#          <\/SPAN><\/FONT><\/SPAN>\uc815\uae30\uc801\uc778 broadcast <\/SPAN><\/FONT>\uba54\uc2dc\uc9c0\ub97c \uc804\uc1a1\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT>key<\/FONT>       <\/FONT><\/SPAN><\/SPAN>\uc8fc\uc18c\uc5d0 \uc804\uc1a1\ub41c \ubaa8\ub4e0 \ud328\ud0b7\uc774<\/FONT><\/SPAN><\/P>
\n

#                   <\/SPAN><\/SPAN>\uc9c0\uc815\ub41c \ud0a4 \ubc88\ud638\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc554\ud638\ud654\ub41c<\/SPAN><\/FONT><\/P>
\n

#                <\/SPAN>   <\/SPAN><\/FONT><\/SPAN>\uc778\uc99d \ud544\ub4dc\ub97c \ud3ec\ud568\ud55c\ub2e4\ub294 \uac83\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. <\/SPAN><\/FONT>\uc774<\/FONT><\/SPAN><\/P>
\n

#                   <\/SPAN><\/FONT><\/SPAN>\ubc88\ud638\uc758 \ubc94\uc704\ub294 unsigned 32 <\/SPAN><\/FONT>\ube44\ud2b8 \uc815\uc218\uc785\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

#                   <\/SPAN><\/SPAN>\uae30\ubcf8\uac12\uc73c\ub85c \uc554\ud638\ud654 \ud544\ub4dc\ub294<\/SPAN><\/FONT><\/P>
\n

#                   <\/SPAN><\/SPAN>\ud3ec\ud568\ub418\uc5b4 \uc788\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

#         <\/SPAN><\/FONT>version<\/FONT>   <\/FONT><\/SPAN>outgoing<\/FONT>  <\/FONT><\/SPAN>NTP <\/FONT><\/SPAN>\ud328\ud0b7\uc5d0 \uc0ac\uc6a9\ub418\ub294 \ubc84\uc804 \ubc88\ud638\ub97c<\/FONT><\/SPAN><\/P>
\n

#                   <\/SPAN><\/FONT><\/SPAN>\uc9c0\uc815\ud569\ub2c8\ub2e4. Version 1, 2 <\/SPAN><\/FONT>\ubc0f<\/FONT> 3<\/FONT><\/SPAN>\uc744 \uc120\ud0dd\ud560 \uc218<\/FONT><\/SPAN><\/P>
\n

#        <\/SPAN>           <\/SPAN><\/FONT><\/SPAN>\uc788\uc2b5\ub2c8\ub2e4. <\/SPAN><\/FONT>\uae30\ubcf8\uac12\uc740 \ubc84\uc804<\/FONT> 3<\/FONT><\/SPAN>\uc785\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

#         <\/SPAN><\/FONT>prefer<\/FONT>    <\/FONT><\/SPAN><\/SPAN>\ud638\uc2a4\ud2b8\ub97c \uc120\ud0dd\ub41c \ud638\uc2a4\ud2b8\ub85c \ud45c\uc2dc\ud569\ub2c8\ub2e4.<\/SPAN><\/FONT><\/SPAN><\/P>
\n

#                   <\/SPAN><\/SPAN>\ub3d9\uae30\ud654\ub97c \uc704\ud574 \ub2e4\ub978 \ube44\uad50 \uac00\ub2a5\ud55c \ud638\uc2a4\ud2b8\ubcf4\ub2e4 \uc774<\/SPAN><\/FONT><\/P>
\n

                    <\/SPAN><\/SPAN>\ud638\uc2a4\ud2b8\uac00 \uc120\ud0dd\ub429\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

# <\/FONT><\/SPAN>\uc804\uccb4 \ubaa9\ub85d\uc740 xntpd<\/SPAN><\/FONT>\uc5d0 \uad00\ud55c \ub9e4\ub274\uc5bc \ud398\uc774\uc9c0\ub97c \ucc38\uc870\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

NTP <\/FONT><\/SPAN>\uc8fc stratum 1 <\/SPAN><\/FONT>\uc11c\ubc84\uc5d0 \ub300\ud55c<\/FONT> ntp.conf <\/FONT><\/SPAN>\ud30c\uc77c \uc608\uc81c<\/FONT>:<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

server 127.127.5.0<\/FONT><\/SPAN><\/P>
\n

fudge 127.127.5.0 stratum 1<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\ud53c\uc5b4 \ubaa8\ub4dc\uc758 NTP <\/SPAN><\/FONT>\uc11c\ubc84\uc5d0 \ub300\ud55c<\/FONT> ntp.conf <\/FONT><\/SPAN>\ud30c\uc77c \uc608\uc81c<\/FONT>:<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

peer ntppeerserver<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\uc11c\ubc84 \ubaa8\ub4dc\uc758 NTP <\/SPAN><\/FONT>\uc11c\ubc84\uc5d0 \ub300\ud55c<\/FONT> ntp.conf <\/FONT><\/SPAN>\ud30c\uc77c \uc608\uc81c<\/FONT>:<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

server sometimeserver prefer<\/FONT><\/SPAN><\/P>
\n

server sometimeserver<\/FONT><\/SPAN><\/P>
\n

server sometimeserver<\/FONT><\/SPAN><\/P>
\n

# <\/SPAN>\uc5b8\uc81c\ub098 \ub85c\uceec \ud074\ub7ed\uc73c\ub85c \ub418\ub3cc\uc544\uac08 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

server 127.127.1.0<\/FONT><\/SPAN><\/P>
\n

fudge 127.127.1.0 stratum 9<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\uc790\uc2e0\uc758 ntp.conf <\/SPAN><\/FONT>\ud30c\uc77c\uc744 \uc0dd\uc131\ud588\ub2e4\uba74<\/FONT>, <\/FONT><\/SPAN>\uc774\ub97c \uc800\uc7a5\ud55c \ub2e4\uc74c<\/FONT> xntpd daemon<\/FONT><\/SPAN>\uc744 \uc2dc\uc791\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

# \/usr\/lib\/inet\/xntpd &<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

3. NTP <\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8 \uc124\uce58<\/SPAN><\/FONT><\/P>
\n

____________________________<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

1. \/etc\/inet\/ntp.client<\/FONT><\/SPAN>\uc5d0\uc11c \/etc\/inet\/ntp.conf<\/SPAN><\/FONT>\ub85c \ubcf5\uc0ac\ud558\uc2ed\uc2dc\uc624<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# cp \/etc\/inet\/ntp.client \/etc\/inet\/ntp.conf<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\uae30\ubcf8 ntp.client <\/SPAN><\/FONT>\ud30c\uc77c\uc740<\/FONT> multicast<\/FONT><\/SPAN>\ub97c \uc0ac\uc6a9\ud558\uc5ec<\/FONT> NTP <\/FONT><\/SPAN>\uc5c5\ub370\uc774\ud2b8\ub97c \uc218\uc2e0\ud569\ub2c8\ub2e4<\/FONT>. NTP <\/FONT><\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8\uac00 \uc774\ub7ec\ud55c \uc5c5\ub370\uc774\ud2b8\ub97c \uc218\uc2e0\ud560 \uc218 \uc788\ub294 \uc7a5\uc18c\ub97c \uc81c\ud55c\ud558\ub824\ub294 \uacbd\uc6b0<\/FONT>, <\/FONT><\/SPAN>\uc774\uac83\uc744<\/FONT> broadcast<\/FONT><\/SPAN>\ub85c \ubcc0\uacbd\ud558\uc2ed\uc2dc\uc624<\/FONT>. (Broadcast <\/FONT><\/SPAN>\ud328\ud0b7\uc740 \ub2e4\ub978 \uc11c\ube0c\ub137\uc5d0 \uc804\ub2ec\ub418\uc9c0 \uc54a\ub294 \ubc18\uba74<\/FONT> multicast <\/FONT><\/SPAN>\ud328\ud0b7\uc740 \uc804\ub2ec\ub429\ub2c8\ub2e4<\/FONT>).<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN><\/P>
\n

# \/etc\/inet\/ntp.client<\/FONT><\/SPAN><\/P>
\n

#<\/FONT><\/SPAN><\/P>
\n

# \/etc\/inet\/ntp.conf<\/FONT><\/SPAN>\ub85c \ubcf5\uc0ac\ud560 \uc218 \uc788\ub294 \uc608\uc81c \ud30c\uc77c. <\/SPAN><\/FONT>\uc774 \ud30c\uc77c\uc740<\/FONT><\/SPAN><\/P>
\n

# <\/FONT><\/SPAN>\uc11c\ubc84\uac00 ntp multicast <\/SPAN><\/FONT>\ub124\ud2b8\uc6cc\ud06c \uc0c1\uc5d0\uc11c<\/FONT> NTP <\/FONT><\/SPAN>\ud328\ud0b7\uc744 \uc81c\uacf5\ud558\ub3c4\ub85d<\/FONT><\/SPAN><\/P>
\n

# <\/SPAN>\uc218\ub3d9\uc801\uc73c\ub85c \uae30\ub2e4\ub9ac\ub294 \ud638\uc2a4\ud2b8\ub97c \uc704\ud55c \uad6c\uc131\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

#<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

multicastclient 224.0.1.1<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

2. xntpd daemon<\/SPAN>\uc744 \uc2dc\uc791\ud558\uc2ed\uc2dc\uc624.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# \/usr\/lib\/inet\/xntpd -m &<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

(NTP <\/FONT><\/SPAN>\uc5c5\ub370\uc774\ud2b8\ub97c \uc218\uc2e0\ud558\ub294 \ubc29\ubc95\uc73c\ub85c broadcast<\/SPAN><\/FONT>\ub97c \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0 \uc778\uc218\ub85c\uc11c<\/FONT> -b<\/FONT><\/SPAN>\ub97c \uc0ac\uc6a9\ud558\ubbc0\ub85c<\/FONT>, xntpd daemon<\/FONT><\/SPAN>\uc740<\/FONT> -m <\/FONT><\/SPAN>\uc778\uc218\uc640 \ud568\uaed8 \uc2dc\uc791\ud569\ub2c8\ub2e4<\/FONT>.)<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

4. ntpdate <\/SPAN>\uba85\ub839\uc758 \uc0ac\uc6a9.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

_____________________________<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

     <\/FONT><\/SPAN>ntpdate <\/FONT><\/SPAN>\uc720\ud2f8\ub9ac\ud2f0\uac00 \ub85c\uceec \ub0a0\uc9dc\uc640 \uc2dc\uac04\uc744 \uc124\uc815\ud569\ub2c8\ub2e4. <\/SPAN><\/FONT>\uc774 \uc720\ud2f8\ub9ac\ud2f0\ub294 \uc815\ud655\ud55c \uc2dc\uac04\uc744 \uacb0\uc815\ud558\uae30 \uc704\ud574<\/FONT>, <\/FONT><\/SPAN>\uc778\uc218\ub85c \uc8fc\uc5b4\uc9c4 \ud638\uc2a4\ud2b8 \uc0c1\uc5d0\uc11c<\/FONT> Network Time Protocol(NTP) <\/FONT><\/SPAN>\uc11c\ubc84\ub97c \ud3f4\ub9c1\ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uc774 \uc720\ud2f8\ub9ac\ud2f0\ub294 \ub85c\uceec \ud638\uc2a4\ud2b8\uc5d0\uc11c \ub8e8\ud2b8\ub85c \uc2e4\ud589\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4<\/FONT>.  <\/SPAN><\/FONT><\/SPAN>\uc774 \uc720\ud2f8\ub9ac\ud2f0\ub294 \uac01 \uc11c\ubc84\ub85c\ubd80\ud130 \uc0d8\ud50c\uc744 \uc5bb\uc5b4 \ud45c\uc900<\/FONT> NTP <\/FONT><\/SPAN>\ud074\ub7ed \ud544\ud130\uc640 \uc120\ud0dd \uc54c\uace0\ub9ac\uc998\uc744 \uc801\uc6a9\ud558\uc5ec \uc774\ub4e4 \uc911 \ucd5c\uc120\uc758 \uac12\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

     <\/FONT><\/SPAN><\/SPAN>\uc774 \uc720\ud2f8\ub9ac\ud2f0\ub294 daemon <\/SPAN><\/FONT>\uc2e4\ud589\uc758 \ub300\uc548\uc73c\ub85c\uc11c<\/FONT> cron(1M)<\/FONT><\/SPAN>\uc73c\ub85c\ubd80\ud130 \uc815\uae30\uc801\uc73c\ub85c \uc2e4\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ud55c \ub450 \uc2dc\uac04\ub9c8\ub2e4 \ud55c\ubc88\uc529 \uc2e4\ud589\ud558\uba74 \ucda9\ubd84\ud788 \uc815\ud655\ud55c \uc2dc\uac04\uc744 \uc5bb\uc744 \uc218 \uc788\uc73c\ubbc0\ub85c \ud074\ub7ed \uc2a4\ud14c\ud551\uc774 \ud544\uc694\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\uc774\ubbf8 xntpd daemon<\/SPAN><\/FONT>\uc744 \uc2e4\ud589\ud558\uace0 \uc788\ub2e4\uba74<\/FONT> ntpdate <\/FONT><\/SPAN>\uba85\ub839\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

\uc774 \uba85\ub839\uc744 \uc2e4\ud589\ud558\ub824\uace0 \ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uc624\ub958\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/SPAN><\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# ntpdate champ<\/FONT><\/SPAN><\/P>
\n

23 Sep 14:55:52 ntpdate[19780]: the NTP socket is in use, exiting<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\ub610\ud55c ntpdate <\/SPAN><\/FONT>\uba85\ub839\uc744 \uc2e4\ud589\ud558\ub824\uba74 \ub8e8\ud2b8 \uc0ac\uc6a9\uc790\uac00 \ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uc624\ub958\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

% ntpdate champ<\/FONT><\/SPAN><\/P>
\n

23 Sep 14:44:36 ntpdate[19743]: bind() fails: Permission denied<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

ntpdate <\/FONT><\/SPAN>\uba85\ub839\uc73c\ub85c \uc11c\ubc84\ub97c \uc9c0\uc815\ud560 \uacbd\uc6b0, <\/SPAN><\/FONT>\uc774\ub984\uc744<\/FONT> IP <\/FONT><\/SPAN>\uc8fc\uc18c\ub85c \uc804\ud658\ud560 \uc218 \uc788\ub3c4\ub85d \uc0ac\uc6a9\uc790\uc758<\/FONT> naming service<\/FONT><\/SPAN>\ub97c \ubc18\ub4dc\uc2dc \uc2e4\ud589\ud558\uc2ed\uc2dc\uc624<\/FONT>. <\/FONT><\/SPAN>\uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uc624\ub958\uac00 \ubc1c\uc0dd\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# ntpdate tiger<\/FONT><\/SPAN><\/P>
\n

23 Sep 15:20:43 ntpdate[20041]: no server suitable for synchronization found<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\uc774 \uc608\uc5d0\uc11c ntp <\/SPAN><\/FONT>\uc11c\ubc84<\/FONT> “jedi”<\/FONT><\/SPAN>\ub97c \ub3d9\uae30\ud654\ub418\ub294 \uc11c\ubc84\ub85c \uc9c0\uc815\ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

# ntpdate jedi<\/FONT><\/SPAN><\/P>
\n

23 Sep 17:12:21 ntpdate[20963]: adjust time server 129.148.192.147 offset<\/FONT><\/SPAN><\/P>
\n

0.001422 sec<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

5. ntpq <\/SPAN>\uba85\ub839\uc758 \uc0ac\uc6a9<\/SPAN><\/FONT><\/P>
\n

___________________________<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

ntpq<\/FONT><\/SPAN>\ub294 \ud604\uc7ac \uc0c1\ud0dc\uc5d0 \ub300\ud574, <\/SPAN><\/FONT>\uad8c\uc7a5\ub41c<\/FONT> NTP <\/FONT><\/SPAN>\ubaa8\ub4dc<\/FONT> 6 <\/FONT><\/SPAN>\uc81c\uc5b4 \uba54\uc2dc\uc9c0 \ud615\uc2dd\uc744 \uc218\ud589\ud558\ub294<\/FONT> NTP <\/FONT><\/SPAN>\uc11c\ubc84\uc5d0\uac8c \uc9c8\uc758\ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ud604\uc7ac \uc0c1\ud0dc\uc758 \ubcc0\uacbd\uc744 \uc694\uccad\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ud504\ub85c\uadf8\ub7a8\uc740 \ub300\ud654\ud615 \ubaa8\ub4dc\ub85c \uc2e4\ud589\ub418\uac70\ub098 \uba85\ub839\uc904 \uc778\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc81c\uc5b4\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. raw and pretty-printed output <\/FONT><\/SPAN>\uc635\uc158\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uac8c \ud558\uba74\uc11c \uc784\uc758 \ubcc0\uc218\uc5d0 \ub300\ud55c \uc77d\uace0 \uc4f0\uae30 \uc694\uccad\uc744 \uc870\ub9bd\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>. ntpq<\/FONT><\/SPAN>\ub294 \uc11c\ubc84\uc5d0 \ubcf5\uc218 \ucffc\ub9ac\ub97c \uc804\uc1a1\ud568\uc73c\ub85c\uc368 \ud53c\uc5b4 \ub9ac\uc2a4\ud2b8\ub97c \uc77c\ubc18 \ud615\uc2dd\uc73c\ub85c \uc5bb\uace0 \uc778\uc1c4\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

NTP <\/SPAN>\uc11c\ubc84\uc5d0\uac8c \ud53c\uc5b4 \ub9ac\uc2a4\ud2b8\uc5d0 \uad00\ud574 \uc9c8\uc758\ud558\ub294 \ubc29\ubc95:<\/SPAN><\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# ntpq -p jedi<\/FONT><\/SPAN><\/P>
\n

     <\/FONT><\/SPAN>remote<\/FONT>           <\/FONT><\/SPAN>refid<\/FONT>      <\/FONT><\/SPAN>st t when poll reach<\/FONT>   <\/FONT><\/SPAN>delay<\/FONT>   <\/FONT><\/SPAN>offset<\/FONT>    <\/FONT><\/SPAN>disp<\/FONT><\/SPAN><\/P>
\n

==============================================================================<\/FONT><\/SPAN><\/P>
\n

*eastpager1.East dollar.East.Sun  <\/SPAN><\/FONT>3 u<\/FONT>   <\/FONT><\/SPAN>97<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>  <\/FONT><\/SPAN>376<\/FONT>     <\/FONT><\/SPAN>2.03<\/FONT>    <\/FONT><\/SPAN>4.564<\/FONT>    <\/FONT><\/SPAN>2.33<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN>LOCAL(0)<\/FONT>        <\/FONT><\/SPAN>LOCAL(0)<\/FONT>         <\/FONT><\/SPAN>5 l<\/FONT>   <\/FONT><\/SPAN>19<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>  <\/FONT><\/SPAN>377<\/FONT>     <\/FONT><\/SPAN>0.00<\/FONT>    <\/FONT><\/SPAN>0.000<\/FONT>   <\/FONT><\/SPAN>10.01<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN>NTP.MCAST.NET<\/FONT>   <\/FONT><\/SPAN>0.0.0.0<\/FONT>         <\/FONT><\/SPAN>16 –<\/FONT>    <\/FONT><\/SPAN>–<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>    <\/FONT><\/SPAN>0<\/FONT>     <\/FONT><\/SPAN>0.00<\/FONT>    <\/FONT><\/SPAN>0.000 16000.0<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN>255.255.255.255 0.0.0.0<\/FONT>         <\/FONT><\/SPAN>16 – <\/FONT>   <\/FONT><\/SPAN>–<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>    <\/FONT><\/SPAN>0<\/FONT>     <\/FONT><\/SPAN>0.00<\/FONT>    <\/FONT><\/SPAN>0.000 16000.0<\/FONT><\/SPAN><\/P>
\n

+sunswe.Sweden.S carbon.UK.Sun.C  <\/SPAN><\/FONT>3 u<\/FONT>   <\/FONT><\/SPAN>48<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>  <\/FONT><\/SPAN>377<\/FONT>   <\/FONT><\/SPAN>156.80<\/FONT>    <\/FONT><\/SPAN>6.367<\/FONT>    <\/FONT><\/SPAN>0.41<\/FONT><\/SPAN><\/P>
\n

+canadamail1.Can franc.East.Sun.  <\/SPAN><\/FONT>3 u<\/FONT>   <\/FONT><\/SPAN>12<\/FONT>   <\/FONT><\/SPAN>64<\/FONT>  <\/FONT><\/SPAN>377<\/FONT>    <\/FONT><\/SPAN>29.48<\/FONT>   <\/FONT><\/SPAN>13.528<\/FONT>   <\/FONT><\/SPAN>29.65<\/FONT><\/SPAN><\/P>
\n

-cosmo.Eng.Sun.C rolex.East.Sun.  <\/SPAN><\/FONT>2 u<\/FONT>   <\/FONT><\/SPAN>98<\/FONT>  <\/FONT><\/SPAN>128<\/FONT>  <\/FONT><\/SPAN>377<\/FONT>    <\/FONT><\/SPAN>84.08<\/FONT>   <\/FONT><\/SPAN>-1.069<\/FONT>    <\/FONT><\/SPAN>0.87<\/FONT><\/SPAN><\/P>
\n

-centralpager1.C venus.EBay.Sun.  <\/SPAN><\/FONT>3 u<\/FONT>   <\/FONT><\/SPAN>41<\/FONT>  <\/FONT><\/SPAN>128<\/FONT>  <\/FONT><\/SPAN>377<\/FONT>    <\/FONT><\/SPAN>68.73<\/FONT>  <\/FONT><\/SPAN>-19.219<\/FONT>    <\/FONT><\/SPAN>6.70<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

remote – <\/SPAN>\uc6d0\uaca9 \ud53c\uc5b4<\/SPAN><\/FONT><\/P>
\n

refid – <\/SPAN>\ud53c\uc5b4\uac00 \ub3d9\uae30\ud654\ub418\ub294 \ud638\uc2a4\ud2b8<\/SPAN><\/FONT><\/P>
\n

st – stratum <\/SPAN>\ubc88\ud638<\/SPAN><\/FONT><\/P>
\n

t – <\/FONT><\/SPAN>\uc720\ud615, <\/SPAN><\/FONT>\uc989<\/FONT> unicast, mulitcast, local   <\/SPAN><\/FONT>(- = <\/FONT><\/SPAN>\uc54c \uc218 \uc5c6\uc74c<\/FONT>)<\/FONT><\/SPAN><\/SPAN><\/P>
\n

poll – <\/SPAN>\ucd08 \ub2e8\uc704 \ud3f4\ub9c1 \uac04\uaca9<\/SPAN><\/FONT><\/P>
\n

reach – <\/SPAN>\ub3c4\ub2ec\uac00\ub2a5\uc131 \ub808\uc9c0\uc2a4\ud130<\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

* <\/SPAN>\uc6d0\uaca9\uc5d0\uc11c \ud604\uc7ac \uc120\ud0dd\ub41c \ud53c\uc5b4\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/SPAN><\/SPAN><\/FONT><\/P>
\n

+ <\/SPAN>\ud638\uc2a4\ud2b8\uac00 \ub3d9\uae30\ud654\uc5d0 \ub300\ud55c \uc218\ub77d \uac00\ub2a5\ud55c \ud53c\uc5b4\uc774\uc9c0\ub9cc \uc218\ub77d\ub418\uc9c0 \uc54a\uc558\uc74c\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4<\/SPAN><\/FONT><\/P>
\n

– <\/SPAN>\uc218\ub77d \ubd88\uac00\ub2a5<\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

6. <\/SPAN>\uc720\uc6a9\ud55c \ub514\ubc84\uae45<\/SPAN><\/FONT><\/P>
\n

_________________________<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

“server” <\/FONT><\/SPAN>\ubaa8\ub4dc(<\/SPAN><\/FONT>\uc5f0\uad00<\/FONT>)<\/FONT><\/SPAN>\ub97c \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0<\/FONT>, ntp.conf <\/FONT><\/SPAN>\ud30c\uc77c\uc5d0 \ucd5c\uc18c\ud55c \uc138 \uac1c\uc758 \ub2e4\ub978 \uc11c\ubc84\ub97c \ub450\ub294 \uac83\uc774 \ubc14\ub78c\uc9c1\ud569\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\uad6c\uc131\ud558\ub294 \uc11c\ubc84\uac00 \uc778\ud130\ub137 \uc0c1\uc5d0\uc11c \uba40\ub9ac \ub5a8\uc5b4\uc838 \uc788\uace0<\/FONT> Firewall<\/FONT><\/SPAN>\uc744 \uc124\uce58\ud588\ub2e4\uba74<\/FONT>, Firewall <\/FONT><\/SPAN>\uc0c1\uc5d0\uc11c \uc0ac\uc6a9\uc790\uc758<\/FONT> NTP <\/FONT><\/SPAN>\uc11c\ubc84\ub85c\ubd80\ud130 \ud3ec\ud2b8<\/FONT> 123 NTP <\/FONT><\/SPAN>\uc11c\ubc84\uac00 \ub4e4\uc5b4\uc624\uace0 \ub098\uac08 \uc218 \uc788\ub3c4\ub85d \ud5c8\uc6a9\ud558\ub294 \uaddc\uce59\uc744 \uc791\uc131\ud558\uc2ed\uc2dc\uc624<\/FONT>. <\/FONT><\/SPAN>\uc77c\ubc18\uc801\uc73c\ub85c<\/FONT> NTP <\/FONT><\/SPAN>\uc11c\ubc84\ub97c<\/FONT> ntp.conf<\/FONT><\/SPAN>\uc5d0 \ub098\uc5f4\ub41c \uc2dc\uac04 \uc11c\ubc84\uc5d0 \ub3d9\uae30\ud654\ud558\ub294 \ub370\uc5d0\ub294 \uc57d<\/FONT> 5<\/FONT><\/SPAN>\ubd84 \uc815\ub3c4\uac00 \uc18c\uc694\ub429\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN>\ub3d9\uae30\ud654\uac00 \ub05d\ub0a0 \ub54c\uae4c\uc9c0 \ub2e4\ub978<\/FONT> NTP <\/FONT><\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c<\/FONT> broadcast\/multicast NTP <\/FONT><\/SPAN>\ud328\ud0b7\uc744 \ubcf4\ub0b4\uc9c0 \ub9c8\uc2ed\uc2dc\uc624<\/FONT>. <\/FONT><\/SPAN>\uc77c\ubc18\uc801\uc73c\ub85c \uc774\ub4e4 \ud328\ud0b7\uc740<\/FONT> 64<\/FONT><\/SPAN>\ucd08 \uac04\uaca9\ub9c8\ub2e4 \uc804\uc1a1\ub429\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

xntpd<\/FONT><\/SPAN>\uc640 ntpdate <\/SPAN><\/FONT>\uba85\ub839\uc740 \ubaa8\ub450<\/FONT> debug <\/FONT><\/SPAN>\uc635\uc158\uc744 \uac00\uc9c0\uace0 \uc788\uc9c0\ub9cc<\/FONT>, ntpdate -d<\/FONT><\/SPAN>\ub97c \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0<\/FONT> “<\/FONT><\/SPAN>\uc791\ub3d9\uc740 \ub05d\uae4c\uc9c0 \uc218\ud589\ub418\uc9c0\ub9cc<\/FONT>” <\/FONT><\/SPAN>\uc2e4\uc81c\ub85c \ub124\ud2b8\uc6cc\ud06c \ud3f4\ub9c1\uc740 \uc218\ud589\ud558\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uc8fc\uc758\ud574\uc57c \ud569\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\ub2e4\uc74c \uc608\uc5d0\uc11c\ub294 ntp.conf<\/SPAN><\/FONT>\uc5d0 \ub300\ud574<\/FONT> ntp.client<\/FONT><\/SPAN>\ub97c \uc0ac\uc6a9\ud558\uace0<\/FONT> xntpd -d<\/FONT><\/SPAN>\ub97c \ud65c\uc131\ud654\ud588\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# \/usr\/lib\/inet\/xntpd -d &<\/FONT><\/SPAN><\/P>
\n

20743<\/FONT><\/SPAN><\/P>
\n

# Solaris tick = 10000<\/FONT><\/SPAN><\/P>
\n

kernel vars: tickadj = 625, tick = 10000<\/FONT><\/SPAN><\/P>
\n

adj_precision = 1, tvu_maxslew = 61875, tsf_maxslew = 0.0fd70a37<\/FONT><\/SPAN><\/P>
\n

create_sockets(123)<\/FONT><\/SPAN><\/P>
\n

bind() fd 19, family 2, port 123, addr 00000000, flags=1<\/FONT><\/SPAN><\/P>
\n

bind() fd 20, family 2, port 123, addr 7f000001, flags=0<\/FONT><\/SPAN><\/P>
\n

bind() fd 21, family 2, port 123, addr 8194c097, flags=1<\/FONT><\/SPAN><\/P>
\n

init_io: maxactivefd 21<\/FONT><\/SPAN><\/P>
\n

report_event: system event ‘event_restart’ (0x01) status ‘sync_alarm,<\/FONT><\/SPAN><\/P>
\n

sync_unspec,<\/FONT><\/SPAN><\/P>
\n

1 event, event_unspec’ (0xc010)<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_hander: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

input_handler: fd=19 length 48 from 8194c093 129.148.192.147<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

(129.148.192.147 is the host “jedi”)<\/FONT><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

\ub610\ud55c multicast<\/SPAN><\/FONT>\ub098<\/FONT> broadcast NTP <\/FONT><\/SPAN>\ud328\ud0b7\uc744 \uae30\ub300\ud558\uba74\uc11c \ub3d9\uc2dc\uc5d0 \ud3ec\ud2b8<\/FONT> 123(ntp) <\/FONT><\/SPAN>\uc0c1\uc5d0\uc11c<\/FONT> ntp <\/FONT><\/SPAN>\ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0 \ub300\ud55c<\/FONT> snooping<\/FONT><\/SPAN>\uc744 \uc2dc\uc791\ud588\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
\n

 <\/FONT><\/SPAN><\/P>
\n

# snoop -d le0 port 123<\/FONT><\/SPAN><\/P>
\n

device \/dev\/le (promiscuous mode) <\/SPAN>\uc0ac\uc6a9<\/SPAN><\/FONT><\/P>
\n

 <\/FONT><\/SPAN>slave-192-1 -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:42:15 1999)<\/FONT><\/SPAN><\/P>
\n

       <\/FONT><\/SPAN>champ -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:42:46 1999)<\/FONT><\/SPAN><\/P>
\n

        <\/FONT><\/SPAN>jedi -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:42:49 1999)<\/FONT><\/SPAN><\/P>
\n

        <\/FONT><\/SPAN>jedi -> BROADCAST<\/FONT>    <\/FONT><\/SPAN>NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:42:50 1999)<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN>slave-192-1 -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:43:19 1999)<\/FONT><\/SPAN><\/P>
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 <\/SPAN>      <\/SPAN><\/FONT>champ -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:43:50 1999)<\/FONT><\/SPAN><\/P>
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        <\/FONT><\/SPAN>jedi -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:43:53 1999)<\/FONT><\/SPAN><\/P>
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        <\/FONT><\/SPAN>jedi -> BROADCAST<\/FONT>    <\/FONT><\/SPAN>NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:43:54 1999)<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN>slave-192-1 -> NTP.MCAST.NET NTP<\/FONT>  <\/FONT><\/SPAN>broadcast (Thu Sep 23 16:44:23 1999)<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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7. <\/SPAN>\uc54c\ub824\uc9c4 \ubc84\uadf8<\/SPAN><\/FONT><\/P>
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______________<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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4060650  <\/SPAN><\/FONT>xntpd<\/FONT><\/SPAN>\uac00 \ub8e8\ud551\ub418\uba74\uc11c, cpu<\/SPAN><\/FONT>\uc5d0 \ubd80\ud558\ub97c \uc8fc\uace0 \uba54\ubaa8\ub9ac\ub3c4 \uc18c\uc9c4\ud558\uc5ec \ucef4\ud4e8\ud130\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc5c6\uac8c \ub9cc\ub4ed\ub2c8\ub2e4<\/FONT>. <\/FONT><\/SPAN><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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4097366  <\/SPAN><\/FONT><\/SPAN>\uc678\ubd80 \ud074\ub7ed \ud558\ub4dc\uc6e8\uc5b4\ub294 xntpd<\/SPAN><\/FONT>\uc5d0 \uc758\ud574 \uc9c0\uc6d0\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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4192098  <\/SPAN><\/FONT>xntpd<\/FONT><\/SPAN>\ub294 \uc77c\ubd80 Ultra 5<\/SPAN><\/FONT>\uc5d0\uc11c<\/FONT> “c011 sync_alarm”<\/FONT><\/SPAN>\uacfc \ub3d9\uae30\ud654\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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4130698  <\/SPAN><\/FONT>Solaris 2.6<\/FONT><\/SPAN>\uc5d0 \ub300\ud55c ntp <\/SPAN><\/FONT>\uc124\uce58<\/FONT>\/<\/FONT><\/SPAN>\uc5c5\uadf8\ub808\uc774\ub4dc \uc9c0\uc2dc\uc0ac\ud56d<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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4061948  <\/SPAN><\/FONT>SPARC <\/FONT><\/SPAN>\uc804\uc6a9: 2.5.1 SUNWxntp Package<\/SPAN><\/FONT>\ub294<\/FONT> Solaris 2.6<\/FONT><\/SPAN>\uacfc \ud638\ud658\ub418\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4<\/FONT>.<\/FONT><\/SPAN><\/SPAN><\/P>
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         <\/FONT><\/SPAN>(E10k <\/FONT><\/SPAN>\uc2dc\uc2a4\ud15c \uc804\uc6a9)<\/SPAN><\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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8. NTP<\/SPAN>\uc5d0 \ub300\ud55c \ucd94\uac00 \uc790\ub8cc<\/SPAN><\/FONT><\/P>
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________________________________<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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http:\/\/www.eecis.udel.edu\/~ntp\/<\/FONT><\/SPAN><\/P>
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http:\/\/www.con.wesleyan.edu\/~triemer\/network\/ntp\/ntp_tcp.html (contains RFC list)<\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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 <\/FONT><\/SPAN><\/P>
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 <\/P><\/p>\n","protected":false},"excerpt":{"rendered":"

\uac1c\uc694: NTP \uc815\ubcf4\uc640 \uc124\uce58   \uc138\ubd80 \uc124\uba85:   \ucc28\ub840 ___________________   1. NTP \uac1c\ub150 2. NTP \uc11c\ubc84 \uc124\uce58 – \uc6b4\uc601 \ubaa8\ub4dc \uc120\ud0dd 3. NTP \ud074\ub77c\uc774\uc5b8\ud2b8 \uc124\uce58 4. ntpdate \uba85\ub839\uc758 \uc0ac\uc6a9 5. ntpq \uba85\ub839\uc758 \uc0ac\uc6a9 6. \uc720\uc6a9\ud55c \ub514\ubc84\uadf8 \uc635\uc158 7. \uc77c\ubc18\uc801\uc778 \ubb38\uc81c\uc640 \uc54c\ub824\uc9c4 \ubc84\uadf8 8. NTP\uc5d0 \ub300\ud55c \ucd94\uac00 \uc790\ub8cc     1. NTP \uac1c\ub150 _____________   […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":""},"categories":[405],"tags":[511],"jetpack_featured_media_url":"","amp_enabled":true,"_links":{"self":[{"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/975"}],"collection":[{"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=975"}],"version-history":[{"count":0,"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/975\/revisions"}],"wp:attachment":[{"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/haisins.synology.me\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}