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forward port to another port

Discussion in 'Cisco/Linksys Wireless Routers' started by gemal, Jan 23, 2007.

  1. gemal

    gemal LI Guru Member

    I have a WRT54G router and a LinkStation Pro, which is a external harddrive with ethernet access.
    The harddrive has a FTP server running at port 21 (cant be changed)

    I like to be able to access the FTP server from outside using port 90421 using:
    ftp ftp.bla.com:90421

    So how do I forward all ftp trafic to port 90421 to port 21 on my LinkStation which has IP
  2. HennieM

    HennieM Network Guru Member

    On the web interface of your WRT, look for "port forwarding" or "port range forwarding".
    You then forward incoming port 90421 to internal IP port 21.

    Bear in mind that FTP may pose a problem, so for starters, set your ftp client to passive mode. You may also need to do more tricks - FTP encapsulates the port numbers in the FTP command on the host server, and this usually creates a problem via a NAT box such as your WRT.
  3. gemal

    gemal LI Guru Member

    I'm not sure where to do this. I've attached screenshots of the port config in the web config.

    As you can see it's not possible to set up the port number for the recieving ip address

    Attached Files:

  4. HennieM

    HennieM Network Guru Member

    It seems you are running stock firmware. AFAIK only 3rd party firmware supports proper port forwarding via the web interface. Look perhaps for an upgrade to your current firmware at linksys.com - play around with the country a bit until you find the latest version for your router version - the version is mucho important, as V5+ is way different from the V4, 3,..

    Search for the WRT autopsy on this site to get more info.

    And sorry, you want to do "port redirection", not just forwarding.
  5. gemal

    gemal LI Guru Member

    I'm using WRT54G Firmware Version: v7.00.4
  6. HennieM

    HennieM Network Guru Member

    That sounds pretty new to me, but the firmware version does not necessarily relate to the WRT's hardware version. Check your hardware version on the bottom of the router, then check out http://www.linksysinfo.org/forums/showthread.php?p=274697 for 3rd party firmware comparisons. (The list does not reflect ALL the 3rd party firmware out there).

    If your WRT's version is 5.x or 6.x your only option AFAIK is dd-wrt micro, and you have to do a bit of a tricky upgrade - see http://www.bitsum.com/openwiking/owbase/ow.asp?WRT54G5_CFE

    If you have a V7.x, you are most likely stuck with the not-so-hot stock firmware, as I don't know of any 3rd party firmware that will load on a V7. Your firmware version of V7.x makes me think that your WRT may be a V7 :-(
  7. kingvj

    kingvj Network Guru Member

    .. and he does hv a WRT54G v7 for sure. most linksys asian sites hv that f/w.

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