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ۼ : 06-02-24 09:15
NTP server & client .
 ۾ :
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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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