dynamically assigning NAT pool?

Discussion in 'Cisco' started by Theodore Frank, Aug 9, 2004.

  1. I am running a Cisco 1751 with two interfaces. 1 10/100 Fast Ethernet
    (for external) and 1 10BT Ethernet (for internal). My external
    interface is hooked up to a cable modem receiving its IP address via
    DHCP. I am currently trying to setup NAT to use my publicly assigned
    dynamic IP address and translate it to my private network. I am
    running into problems when I try to configure the "ip nat pool"
    command. Since my cable modem receives its IP via DHCP, I have no
    idea what IP address(es) to list in my external pool since my IP
    changes. Is there a way for my pool to configure itself dynamically?
    Any help would be greatly appreciated! BTW, I am running IOS 12.2-15.
    Thank-you in advance.

    Theodore Frank, Aug 9, 2004
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  2. Theodore Frank

    Tosh Guest

    ..... Is there a way for my pool to configure itself dynamically?

    No need for any pool, try the following command:
    "ip nat inside source list x interface Fa0/0 overload", where "list x" is
    your nat filter and "fa0/0" in your outside interface.
    This way nat will always follow the ip assigned to the outside interface.
    Tosh, Aug 9, 2004
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