DMZ and FTP Server Issues

Discussion in 'Tomato Firmware' started by OLOCO, Dec 26, 2011.

  1. OLOCO

    OLOCO Networkin' Nut Member

    I wish you could help me.
    I have an asus rt16n with Tomato Firmware v1.28.9054 MIPSR2-beta K26 USB Ext
    All the settings are from default.
    Well, I have got a server throuth DMZ (
    I want to connect to the external hard drive via integrated ftp server, but there is a problem. When DMZ is NOT activated, I can connect correctly via Internet and Lan, but if I activate the DMZ option, I just can connect via Lan to the ftp server, but not from Internet.
    I think Its something related to Iptables, but im not sure. I wish you could help me to find the solution to this problem.
    This is the result of iptables -L -n with DMZ activated:

    And this is the iptables withouth DMZ activated:

    When I try to connect via filezilla to the integrated ftp server when DMZ is activated, I get this error:
    The strange thing is that I can connect to the web server from Internet, the same as sshd.
    I understand that iptables will accept all the incoming connections (INPUT CHAIN) because of
    Also, I have tried to add:
    but the same result...
    Deleting the line in CHAIN FORWARD containing
    (this is the one that the router add to iptables when DMZ is activated), gives the same result.

    I have no more ideas....
  2. OLOCO

    OLOCO Networkin' Nut Member

    Well, after doing a lot of tests, I think that I finally got a solution. I just had to port forward 20 and 21 to (router ip).
    But, anyway, I don't understand one thing. I don't have to do port forwarding so as to use sshd and http access to the router from Internet. So, why do I have to do it so as to use ftp integrated server?

    Now, my iptables -n -L looks like this:

    Could anybody try to explain me that question?
    Thank in advance!!
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