# 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 noquery nomodify nopeer notrust notrap #server 0.pool.ntp.org #server 1.pool.ntp.org #server 2.pool.ntp.org server ntp1.jst.mfeed.ad.jp server ntp2.jst.mfeed.ad.jp server ntp3.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 ============================================================================== ntp1.jst.mfeed. 210.173.160.56 2 u 15 64 1 9.320 6707.99 0.001 ntp2.jst.mfeed. 210.173.160.86 2 u 14 64 1 9.173 6707.97 0.001 ntp3.jst.mfeed. 210.173.160.86 2 u 13 64 1 9.271 6707.85 0.001 LOCAL(0) LOCAL(0) 10 l 23 64 77 0.000 0.000 0.001
# nmap -sU localhost