MN-700: how to open ports for Netmeeting

Discussion in 'Broadband Hardware' started by Martin, Apr 15, 2004.

  1. Martin

    Martin Guest

    I have a MN-700 Wireless Router and i need to know how to
    accomplish the following (as per Microsoft):

    "Establishing a NetMeeting Connection with a Firewall
    When you use NetMeeting to call other users over the
    Internet, several IP ports are required to establish the
    outbound connection. The following table shows the ports,
    their functions, and the resulting connection.

    Port Function Outbound Connection
    389 Internet Locator Service (ILS) TCP
    522 User Location Service TCP
    1503 T.120 TCP
    1720 H.323 call setup TCP
    1731 Audio call control TCP
    Dynamic H.323 call control TCP
    Dynamic H.323 streaming Real-Time Transfer Protocol (RTP)
    over UDP

    If you use a firewall to connect to the Internet, it must
    be configured so that the IP ports are not blocked.

    To establish outbound NetMeeting connections through a
    firewall, the firewall must be configured to do the

    Pass through primary TCP connections on ports 389, 522,
    1503, 1720, and 1731.
    Pass through secondary TCP and UDP connections on
    dynamically assigned ports (1024-65535). "

    Should i use application triggered port forwarding to
    accomplish this???
    Martin, Apr 15, 2004
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  2. Martin

    Jason Tsang Guest

    The last rule you posted is the problem.

    It's not really feasible to make a rule that will pass essentially every
    port (1024-65536) to the computer running Netmeeting. That's why H323 is
    not a really a NAT friendly protocol.

    It simply makes more practical sense to put the computer in question in DMZ.

    If you do this, make sure you have sufficient protection on that computer,
    as it'll be open to attack. The usual caveats about keeping your windows
    and apps up to date on patches, not running unnecessary servers etc etc
    Jason Tsang, Apr 15, 2004
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