SIP Trunks failing

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SIP Trunks failing

L0 Member

Hi All, Im a Telephone system installer and have installed a system with SIP trunks which authenticate with the public IP (not register user name/password)

The SIP trunks remain working at all times for outgoing fails after a time normally about a day. the firewall is a palo alto PA220 

the SIP provider tells me they are trying to communicate on a port other than 5060  and as a result the incoming call fails to get through the firewall. I have asked the I.T company to allow all traffic from the SIP providers IP and he said he has. The incoming was working since last friday the 3rd July but this morning the calls are failing again and the SIP provider now say its trying to use :5164 to establish the call. Any ideas what the IT need to set to make sure it communicates on port 5060 only and not try to change the port and this can be locked down to one single IP from the SIP provider ?? thank you Jpalo alto.png


Cyber Elite
Cyber Elite


Sounds like the PAN admin may not actually be setting up a static port translation for this traffic and it's just hitting a DIPP NAT. They'll want to ensure that the source address translation type isn't interfering with the source port (IE: A Dynamic IP or Static NAT entry).

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