3 Replies Latest reply on May 15, 2012 12:00 PM by sliedl

    Using Sidewinder for SIP traffic

    andy318

      I'm curious what experience other folks have had with SIP traffic? How well does NAT traversal (and SIP message modification) work and what volume of SIP traffic other folks are handling through the firewall.

        • 1. Re: Using Sidewinder for SIP traffic
          sliedl

          The SIP proxy only examines the SIP traffic that negotiations the multimedia session, not the RTP traffic that is used to exchange the audio/video.  You can filter out audio or video streams with the SIP proxy though.

           

          Here are some KB articles about SIP:

          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: SIP Proxy Support for NAT and Redirection (KB63941)

          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: How to allow SIPxchange through the firewall using the SIP proxy (KB63170) 
          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: How to eliminate the SIP proxy burb and media/SIP endpoint restrictions (KB63938)

          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: Configuring enough available UDP ports when using the SIP proxy with Load-sharing HA (KB62996)

          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: ERROR: Media address changed from ZZZ.ZZZ.ZZZ.ZZZ to 0.0.0.0. Blocking creation of channel. (regarding SIP Proxy)

          Firewall Enterprise/Sidewinder/Secure Firewall 7.x: ERROR: Media address of XXX.XXX.XXX.XXX for user agent at YYY.YYY.YYY.YYY. Blocking creation of channel. (regarding SIP Proxy) (KB64271)

          • 2. Re: Using Sidewinder for SIP traffic
            andy318

            Thanks. So the proxy does not examine the RTP traffic but it will modify the SDP in the SIP message and replace the internal IP address/port for RTP with one that the firewall will proxy to the original IP/port?

             

            We have the S2008 model and plan to use this for ~200 simultaneous calls. Assuming the firewall has more than enough headroom to handle the raw bandwidth these calls would generate (~20Mbps) would the SIP Proxy be able to handle this load?

             

            Message was edited by: andy318 on 5/14/12 5:40:55 PM CDT
            • 3. Re: Using Sidewinder for SIP traffic
              sliedl

              Unfortunately we have no traffic numbers here in Support.  A Sales associate may have some specific numbers on SIP that you can see.