# vi /etc/ntp.conf # 許可するクライアントサーバのIP restrict 192.168.100.2 mask 255.255.255.255 #server 0.pool.ntp.org #server 1.pool.ntp.org #server 2.pool.ntp.org server ntp.jst.mfeed.ad.jp
# /etc/rc.d/init.d/ntpd start
設定で指定したntpサーバが表示されていればOK
# /usr/sbin/ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== *ntp3.jst.mfeed. 210.173.176.4 2 u 25 64 77 10.864 42.169 11.804 LOCAL(0) LOCAL(0) 10 l 23 64 77 0.000 0.000 0.001
# nmap -sU localhost