client is not sync time with server

[Anh-Thu Tran]

Look like our linux machines (clients) are not sync time with AIX time server. They are different about 5 mins. I did use redhat-config-date to enable NTP including the server name. The /etc/ntp.conf and /etc/ntp/step-tickers show up the correct server name, but I got this error message when the linux box rebooted:
Feb 19 08:09:32 fwcl7 ntpdate[1909]: no server suitable for synchronization found
Feb 19 08:09:32 fwcl7 ntpd: failed
Feb 19 08:09:32 fwcl7 ntpd[1913]: ntpd 4.1.2@1.892 Tue Feb 24 06:32:25 EST 2004 (1)
Feb 19 08:09:32 fwcl7 ntpd: ntpd startup succeeded
Feb 19 08:09:32 fwcl7 ntpd[1913]: precision = 12 usec
Feb 19 08:09:32 fwcl7 ntpd[1913]: kernel time discipline status 0040
Feb 19 08:09:32 fwcl7 ntpd[1913]: frequency initialized 0.000 from /var/lib/ntp/drift
The ps -ef |grep ntp shows:
# ps -ef|grep ntp
ntp 1913 1 0 Feb19 ? 00:00:15 ntpd -U ntp -p /var/run/ntpd.pid -g

Any ideas? Thanks.

[Manohar Manne_1]

Allow NTP client traffic
iptables -t filter -A INPUT -p udp -m udp --sport 123 -j ACCEPT

you can use Security & firewall configuration and add ntp port