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Thread: FTP Behind Router

  1. #1
    Wats ur tale mothergoose?
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    FTP Behind Router

    Been readin about the net and this seems a very common problem I have with different solutions.

    Basically a computer outside my network cant seem to connect via ftp to my a computer inside it.
    So far I have gathered that the router gives the computers LAN ip's and i need to use port forwarding to tell the router that anything involving the wan ip + a certain port should be sent to the computer i desire, but im having no luck at all. Can anyone help me with this, ive tried virtual network, special application, DMZ all with no luck (dont know if im doing it right portwise etc)
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    Junior Senior Member Aaron's Avatar
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    Yup, as you said you need to use port forwarding.

    Before you start you need to know the port you wish to use and the IP on the internal network of the PC running the FTP.

    How you enable port forwarding will depend on your router but on my Linksys one I bring up the router page in Internet Explorer, click on the "Applications & Gaming" tab and then enter all of the information.

    Click apply and bob's your uncle. FTP clients then connect using ftp://external-IPort

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    hmm unclear sort of, ill screen shot what my router menu looks like...



    I think the ftp port is 21.
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    Furry Shorty's Avatar
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    FTP uses 20 and 21 to initiate and use incoming TCP data streams. Need to set two entries.

    Also, make sure you FTP server is actually listening on port 21 (it's config should say what port it's running on). You only need to create two rules both with TCP .. one on port 20 and the other on port 21.

    Finally, make sure the FTP server has a static internal IP address, so another machine doesn't take the IP address in a strange network moment that can happen (eg.. powercut).
    "In a world without walls and fences, who needs Windows and Gates?"

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    Wats ur tale mothergoose?
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    k this is what ive done:



    with no success
    3D Mark 2k1 - 20661

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    daft ideas inc. scottyman's Avatar
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    you'll need to find the port forwarding section, rather than port triggering - port triggering is when you send a known sequence of bytes (knocks) to a series of ports - this then instructs the router to open the port to access from the calling system.
    Find port forwarding and make changes there instead. Also worth getting a hostname setup with dyndns.org or free-ip.net (? I think) just so you'll have a static reference to the address - makes it easy for testing too!

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    this look better?
    Last edited by Korky; 26-03-2004 at 10:18 PM.
    3D Mark 2k1 - 20661

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    Will work for beer... nichomach's Avatar
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    I'd have thought the virtual server section was where you'd find appropriate entries for configuring FTP server port forwarding? BTW, what model router is it, please?
    Last edited by nichomach; 26-03-2004 at 05:50 PM.

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    daft ideas inc. scottyman's Avatar
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    depends on the router... generally it's under advanced port forwarding rules - never seen that one before!
    that's the right location (btw Korky - capital JPG )

  10. #10
    Wats ur tale mothergoose?
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    ye sorry there it is now, its a Q-TEC 790RH, dont suppose its the best router you can buy but my dad just turned up with it.
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  11. #11
    Will work for beer... nichomach's Avatar
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    Quote Originally Posted by Korky
    ye sorry there it is now, its a Q-TEC 790RH, dont suppose its the best router you can buy but my dad just turned up with it.
    Seems adequate; check pages 32-33 of the user manual available at
    Q-Tec Support Page which covers configuring the router to forward requests for different services to a machine in the LAN. As stated above, ports 20 and 21 need to be redirected to your internal FTP box.

  12. #12
    Wats ur tale mothergoose?
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    i have done exactly what it shows on the user manual but i get no luck when i try to access my server.
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    daft ideas inc. scottyman's Avatar
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    are you sure you're trying to access the correct ip, and the router isn't set to
    block wan requests?

  14. #14
    HEXUS webmaster Steve's Avatar
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    Try setting the FTP server to use passive mode transfers.
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    Panzer Division Marduk PanzerKnight's Avatar
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    Are you using a pasv connection and bulletproof ftp? if so, set the passive port range to 50000 - 51000 in bp and forward these ports on your router

  16. #16
    Wats ur tale mothergoose?
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    scotty - any idea how i can check this.

    kez, panzerknight - tried passive with the ports panzer suggested no luck :S
    3D Mark 2k1 - 20661

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