Matrix : VoIP panels with IVC connection: the detail of IP packet and security

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    1. Handshake: TCP protocol, initiated by panels and accepted by IVC / E-IPA cards.

    Panel to IVC / E-IPA card :TCP package:

     

    Source IP

    Src Port

    Destination IP

    Des Port

     

    Source IP

    Src Port

    Destination IP

    Des Port

    Setting at panel- IP address

    Random*

    Setting via panel menu

    sets Login IP

    Setting via panel menu

    set Login port

    *Handshake can only be initiated by panels and accepted by IVC / E-IPA cards. This is why the panel’s TCP socket is not bound to a specific local TCP port. In other words: with every handshake attempt, a new socket is created, which uses the next available local port. This is why after unsuccessful attempts a new TCP IP port is selected which uses the next available local port.

    If you are monitoring this connection using wireshark, (or your firewall monitoring tool) you can see the port number change with every new attempt when you look at network captures.

     

    IVC / E-IPA card to Panel :TCP package

    Source IP

    Src Port

    Destination IP

    Des Port

    Source IP

    Src Port

    Destination IP

    Des Port

    EHX setting-IVC port

    EHX setting-TCP/UDP port

    first panel request

    package-Source -IP

    first panel request

    package-Src TCP Port

    2. Normal communication: Panel to IVc/ E-IPA communication is done by UDP (audio and control data)

    UDP Protocol. The IVC stack is a proprietary Clear-Com peer to peer VoIP stack. Peers are called by panel and they are symmetric.

    Panel to IVC / E-IPA Card : UDP package

    Source IP

    Src Port

    Destination IP

    Des Port

    Source IP

    Src Port

    Destination IP

    Des Port

    Setting of panel- IP address

    fixed 6001 (or 6003 for some legacy V series panel )

    Setting via panel menu

    sets Login IP

    Setting via panel menu

    set Login port

    IVC / E-IPA card to Panel : UDP package

    Source IP

    Src Port

    Destination IP

    Des Port

    Source IP

    Src Port

    Destination IP

    Des Port

    EHX setting-IVC port

    EHX setting-TCP/UDP port

    first called UDP package

    from panel-Source-IP

    first called UDP package

    from panel-Src Port

    • panel setting-login IP = EHX setting-IVC port

    • Panel setting-Login port= EHX setting-TCP/UDP port

     

    See other solutions

    EHX: IVC IP Protocol - Port 6001 - IP Panels

    Matrix: What settings do I use when I have IP panels on both local / remote networks using NAT routing?

     

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