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Ports to open on ASA for SIP trunk to ISP

We recently configured a SIP trunk to the PSTN with our CallManager and everything is working beautifully. Right now we have all ports open inbound and would like to lock it down. Is there anything else besides port 5060 UDP that I need open? I am also inspecting SIP traffic which should allow dynamic ports to be opened correct? I just want to make sure Im not missing anything.

Thanks.

1 REPLY
Cisco Employee

Re: Ports to open on ASA for SIP trunk to ISP

I would open all traffic between the IP addresses used for signaling and media by the SIP SP.

-Felipe

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