We have Cisco ACL configured for all inbound traffic and today i have add NTP to allow few remote NTP server to sync tim.

I have created object-group NTP group and multiple remote NTP server in that group.

This is my ACL

permit udp object-group NTP any eq ntp

and ACL is applied on inbound interface of router but still my client not able to sync time.

[root@client1 ~]# ntpdate -u xx.xx.xx.xx
14 Aug 11:08:12 ntpdate[43243]: no server suitable for synchronization found
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer.
    – Ron Maupin
    Feb 19, 2018 at 18:45

1 Answer 1



permit udp object-group NTP eq ntp any

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.