PIX and NAT Timeout (SIP)

Discussion in 'Cisco' started by Matthew Boehm, Mar 28, 2005.

  1. Hey all,
    I'm guessing this is a PIX problem. Not sure. Wanted to get some
    brainstorming. We have an internal network protected by a PIX. Our SIP
    server has 2 NICs, one on public address and one on internal address. Most
    of our Cisco 79XX series phones connect to the SIP server via the internal
    interface. No NAT translation here.

    We have one phone (a softphone) that connects to the public IP of the
    server, which gets NAT'd by the PIX. What is the correct method to
    capture/monitor a specific hostname/port on the pix to watch for packets?

    For example, in linux I can use "ngrep host xxx.xxx.xxx.xxx and port 5060"
    and see all packets that are comming/going to host xxx.xxx.xxx.xxx via port

    If that snif shows everything is OK, then I'm guessing there is some sort
    of NAT timeout period? How can I increase that timeout period?


    Matthew Boehm, Mar 28, 2005
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