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  • 1.  VOIP traffic

    Posted 10-24-2016 05:35

    Dears,

     

    i would appreciate your help with my case:

     

    i have a remote public IP for call manager, i need to grant the PCs on my LAN PCs to access it, so i have added a route and policy to allow the access to that IP, once i configured it on one of the LAN PCs softphone, it got connected for a while then it start to flap between connected and disconnected, ALG SIP is enabled on my firewall (ssg350) , the Public IP is reachable without any issue, i've been informed that the RTP traffic is not reaching the call manager in the remote site, while im allowing ANY ports to towards that IP.

     

    could you please share your experience with me so i can troubleshoot the problem.

     

    thanks in advance



  • 2.  RE: VOIP traffic

    Posted 10-24-2016 08:09

    Hi,

     

    Try to disable the SCCP ALG on the firewall by the following command:

     

    unset alg sccp enable

     

     



  • 3.  RE: VOIP traffic
    Best Answer

    Posted 10-24-2016 15:30

    Please make sure you have turned off the default interface NAT and are using policy based NAT for your trust zone.  See the details on how this affects SIP setups here.

     

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB7407