I confirmed the package"4.2.6.p3+dfsg-1ubuntu3.9" solved the problem in Ubuntu Precise
NTP Version : 1:4.2.6.p3+dfsg-1ubuntu3.1 With no IPTABLES rule ==> Working $ ntpdate x.x.x.x 11 Feb 16:15:19 ntpdate[1243]: adjust time server x.x.x.x offset 0.190571 sec With IPTABLES rule ==> Not working $ iptables -t nat -A POSTROUTING -p UDP --dport 123 -j SNAT --to-source y.y.y.y:100-122 $ntpdate x.x.x.x 11 Feb 16:15:36 ntpdate[1253]: no server suitable for synchronization found With ntp (precise-proposed) + IPTABLE rules ==> Now working NTP version: 1:4.2.6.p3+dfsg-1ubuntu3.9 $ iptables -t nat -A POSTROUTING -p UDP --dport 123 -j SNAT --to-source y.y.y.y:100-122 $ ntpdate x.x.x.x 11 Feb 16:21:26 ntpdate[1986]: adjust time server x.x.x.x offset 0.005394 sec Eric ** Tags added: verification-done-precise -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to ntp in Ubuntu. https://bugs.launchpad.net/bugs/1479652 Title: [patch] ntpd rejects source UDP ports less than 123 as bogus To manage notifications about this bug go to: https://bugs.launchpad.net/ntp/+bug/1479652/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
