Melanie Pfefer wrote: > Hi > > What ports need to be opened if my ntp servers are inside a firewall? > > thank you
Port 123. But only if you need to query outside servers or serve time to systems outside the firewall. If you purchase and install a hardware reference clock, such as a GPS timing receiver, you can dispense with access to servers outside the firewall. This is an option reserved for the utterly paranoid! Normally you would use one or more outside servers as a backup and sanity check. _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
