Solved: ASA5505 NTP Config

zekebashi · ‎05-07-2014

Hello,

We have stand-alone hosts(not on a PDC) behind an ASA 5505 and we would like to configure their clocks to synch up with an external NTP sources. I wasn't sure if I could configure the ASA to use an external NTP sources and then point the hosts to synch up their clocks with the ASA's clock. Is this a good implementation?

Thanks in advance.

Best, ~zK

Marvin Rhoads · ‎05-07-2014

The ASA can only act as an NTP client, not as a server.

Just point the hosts to an external NTP server and let them sync. If you have an access-list on your inside interface (restricting outbound traffic from your LAN) then just add a permit statement for ntp (udp/123).

View solution in original post

Marvin Rhoads · ‎05-07-2014

The ASA can only act as an NTP client, not as a server.

Just point the hosts to an external NTP server and let them sync. If you have an access-list on your inside interface (restricting outbound traffic from your LAN) then just add a permit statement for ntp (udp/123).

zekebashi · ‎05-07-2014

Thanks for the reply, Marvin!

Best, ~zK