ۼ : 06-02-24 09:15
۾ :
ȸ : 17,876
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NTP SERVER & CLIENT
NTP ǻ Ŭ̾Ʈ ð ٸ Ǵ ű ִ Ÿ ҽ Ǵ ȭϴ ˴ϴ.
ð
1. peer host_address [key #] [version #] [prefer]
- ȣƮ ּҷμ Բ symmetric active .
- ߾ ȭ Ҽ .
2. server host_address [kery #] [version #] [prefer] [mode #] server
- command ̸ Բ client .
- 忡 ߾ ȭ ȭ
.
3.broadcast host_address [key#] [version #] [ttl #]
- broadcast ȴٴ մϴ. 忡 command
broadcast/multicast ּ Ŭ̾Ʈ broadcast .
key ּҿ ۵ Ŷ Ű ȣ Ͽ ȣȭ ʵ带
version outgoing NTP Ŷ Ǵ ȣ Version 1,2,3 ⺻ 3.
prefer ȣƮ õ ȣƮ ǥ,ȭ ٸ ȣƮ ȣƮ .
NTP SERVER . ( server ) 1
(sun>root)/etc/inet# cp ntp.server ntp.conf
(sun>root)/etc/inet#vi ntp.conf
# Either a peer or server. Replace "XType" with a value from the
# table above.
#server 127.127.XType.0 prefer
#fudge 127.127.XType.0 stratum 0
server 127.127.1.0 ---> ÷ ư .
server time.kriss.re.kr prefer
server 127.127.1.0
server gps.bora.net
server ntp.ewha.net
server time.bora.net
server time.nuri.net
server ntp2.gngidc.net
server time.kriss.re.kr
#broadcast 224.0.1.1 ttl 4 -->⺻ ( Ʈ ntp )
broadcast 192.168.0.222 ttl 4
wq!
NTP SERVER . ( Ǿ(peer) ) 2
peer gps.bora.net key 0 version 3 prefer --> server server peer .
(sun>root)/etc/inet#/etc/init.d/xntpd start
(sun>root)/etc/inet# ps -ef | grep ntp
root 479 400 0 08:40:55 pts/2 0:00 grep ntp
root 456 1 0 08:23:07 ? 0:01 /usr/lib/inet/xntpd
(sun>root)/etc/inet#
(sun>root)/etc/inet# ntpq -p (NTP Ǿ Ʈ )
remote refid st t when poll reach delay offset disp
==============================================================================
sun 0.0.0.0 16 - - 64 0 0.00 0.000 16000.0
gps.bora.net 0.0.0.0 16 u 48 64 0 0.00 0.000 16000.0
(sun>root)/etc/inet#
(e220>root)/# snoop -d hme0 port 123
Using device /dev/hme (promiscuous mode)
192.168.0.222 -> gps.bora.net NTP symmetric active (Fri Feb 24 08:35:26 2006)
gps.bora.net -> 192.168.0.222 NTP server (Sat Jan 19 03:58:31 2002)
e220 -> 192.168.0.222 NTP client (Fri Feb 24 08:35:46 2006)
192.168.0.222 -> e220 NTP server (Fri Feb 24 08:35:47 2006)
NTP Client
(sun>root)/etc/inet# cp ntp.client ntp.conf
- ⺻ ntp.client multicast Ͽ ntp Ʈ մϴ. NTP Ŭ̾Ʈ ̷
Ʈ ִ Ҹ Ϸ ̰ broadcast մϴ.(broadcast Ŷ
ٸ ؿ ʴ ݸ multicast Ŷ ˴ϴ.)
(sun>root)/etc/inet#/etc/init.d/xntpd start
#multicastclient 224.0.1.1 --> ⺻
server 192.168.0.222
wq!
(sun>root)/etc/inet# ps -ef | grep ntp
root 479 400 0 08:40:55 pts/2 0:00 grep ntp
root 456 1 0 08:23:07 ? 0:01 /usr/lib/inet/xntpd
(sun>root)/etc/inet#
(sun>root)/etc/inet# ntpq -p
remote refid st t when poll reach delay offset disp
==============================================================================
sun 0.0.0.0 16 - - 64 0 0.00 0.000 16000.0
gps.bora.net 0.0.0.0 16 u 48 64 0 0.00 0.000 16000.0
(sun>root)/etc/inet#
remote - Ǿ , refid - Ǿ ȭǴ ȣƮ st- stratum ȣ ,
t - unicast , multcst, local ( - = ˼ )
poll - reach - ɼ
* ݿ õ Ǿ Ÿϴ.
+ ȣƮ ȭ Ǿ ʾ Ÿ.
_ Ұ
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