Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

NTP Read Variables port 123/udp

How do I set NTP restrict default access to ignore all info packets: restrict default ignore

3 REPLIES
Silver

Re: NTP Read Variables port 123/udp

You can use ACLs to verify trusted NTP sources

New Member

Re: NTP Read Variables port 123/udp

Please give me an example.

Re: NTP Read Variables port 123/udp

Having a little difficulty interpreting your question.

The following would allow you to control which hosts are allowed to interact with NTP services on the Cisco device, and whether they can interact as clients or peers.

access-list 2 remark --- NTP Peers.

access-list 2 permit

access-list 2 deny any log

access-list 3 remark --- NTP Clients.

access-list 3 permit 192.168.1.0 0.0.0.255

access-list 3 deny any

ntp source Loopback0

ntp access-group peer 2

ntp access-group serve-only 3

ntp server

Perhaps refer to:

Network Time Protocol: Best Practices White Paper

http://www.cisco.com/warp/public/126/ntpm.pdf

902
Views
0
Helpful
3
Replies
CreatePlease to create content