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Allowing NTP on all interfaces

insccisco
Level 1
Level 1

‎07-29-2009 09:05 AM - edited ‎03-11-2019 09:00 AM

Hi guys,

I have configured my 1841 router to be a Master NTP server.

This router has 5 VLANS and hosts coming from all those VLANs can successfully act as NTP clients to get the proper time from the 1841. However, on one of those VLANs, I have an access list applied and hosts on this VLAN can't talk to the NTP master (the 1841)

What do I need to allow on the ACL to allow hosts on this VLAN to use the 1841 as their master NTP?

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Collin Clark
VIP Alumni
VIP Alumni

‎07-29-2009 11:03 AM

NTP runs on UDP 123 so you'll have to open up that port.

Hope it helps.

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insccisco
Level 1
Level 1
In response to Collin Clark

‎07-29-2009 06:29 PM

great, thank you

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