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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
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    – Ron Maupin
    Feb 19, 2018 at 18:45

1 Answer 1

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Solved:

permit udp object-group NTP eq ntp any

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