Routing / port forwarding / WAN ip address?

Discussion in 'Tomato Firmware' started by beikul, Oct 15, 2010.

  1. beikul

    beikul Networkin' Nut Member

    Apologies for the vague title, I wasn't sure how best to describe this.

    This is a simplified description of my setup (with a made up WAN IP address):

    • WRT54GL + Tomato 1.28 with LAN IP address
    • current WAN ip address
    • two PCs on the LAN:
      • PC One IP address
      • PC Two IP address
    • PC Two is running an FTP server listening on port 21
    • 'basic' port forwarding rule set up as follows:
      • proto = Both
      • src address = blank
      • ext ports = 21
      • int ports = blank
      • int address = (i.e. PC Two)

    My issue is: on PC One, if I telnet to the the WAN ip address of port 21 a connection is successfully forwarded to PC Two but the IP address that is recorded by the FTP server is the WAN IP of I was expecting it to record the LAN IP address of PC One i.e.

    The reason I was 'expecting' this is because I'm pretty sure it's the behaviour I have seen in the past with different firmwares (specifically HyperWrt 2.0).

    My questions:
    1) is this the expected behaviour and my memory is wrong?
    2) is there any way to change this to the behaviour I was expecting? I was thinking possibly modifying the routing table but I confess I do not really understand the concepts involved.

    Any help would be greatly appreciated, thanks in advance.
  2. beikul

    beikul Networkin' Nut Member

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