I applied 14 new patches to my Sophos Home UTM9 and one of them seems to have broken my Vonage BasicTalk VOIP phone service. Can anyone help me figure out why the phones register if connected directly to my cable modem but not when they are behind the UTM9?
I open the following ports
DNS 53
UDP 69
UDP 10000:20000
SIP TCP/UDP 5060 and
NTP
You can also open port 21,80 for firmware upgrades but usually the ports above will get you going fine.
There is a vonage article about this here https://businesssupport.vonage.com/articles/answer/Port-Forwarding-807
I open the following ports
DNS 53
UDP 69
UDP 10000:20000
SIP TCP/UDP 5060 and
NTP
You can also open port 21,80 for firmware upgrades but usually the ports above will get you going fine.
There is a vonage article about this here https://businesssupport.vonage.com/articles/answer/Port-Forwarding-807
