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    Need help with a firewall rule to block port 23 fr

    Discussion in 'Networking and Wireless' started by heebiejeebie, Dec 23, 2004.

  1. heebiejeebie

    heebiejeebie Notebook Enthusiast

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    I have a router/firewall that is open to telnet access for administration from the WAN and LAN. I'd like to block the WAN side but can't find a config setting to do it. So I figured I could add an IP filtering rule to block it.

    Earlier I was messing around with some ideas of how to do this and TWICE had to reset the router and reconfigure it after I lost all access to it and the net!!!!!

    My very limited understanding is that the basic filtering rules are fairly generic, not really specific to a particular hardware. So hopefully one of you can help me with this.

    The new rule:

    Source: 0.0.0.0
    Destination: (my.wan.ip.here)
    Protocol: TCP
    Source Port: Blank
    Destination Port: 23
    Rule on: On
    Forward Packet: No

    I think this will block all packets heading toward our public IP port 23. Does this make sense? Anyone out there who knows for sure that this will work?

    I'd just try it but everytime I try something I end up having to reset the router!

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    Last edited by a moderator: May 5, 2015
    heebiejeebie, Dec 23, 2004
    #1
  2. phroenips

    phroenips Notebook Guru

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    that should work....in theory ;)

    -----------------------------------
    Scott

    Network Guru Extraordinaire
     
    phroenips, Dec 28, 2004
    #2