help to setup ftp server behind dsl router and firewall

help to setup ftp server behind dsl router and firewall

Post by max barwel » Tue, 28 Jan 2003 22:29:53



I cant seem to find concise information on doing this, I wish to have a
ftp server on a box behind a dynalink dsl router and a firewall/gateway
that uses iptables. Any help, pointers to TFM etc, appreciated.

regards max

 
 
 

help to setup ftp server behind dsl router and firewall

Post by Anan » Wed, 29 Jan 2003 23:52:04


Hi,

I had (once upon a time) setup a linux fw w/ iptables and a ftp server on a
private net behind the NAT f/w.

I can't remember the exact config but what I remember is:

1. Internal ftp server was pure-ftpd, config such that it listens on port
21, and random portrange between 50000-55000 (for data connection) Check
pureftpd docs for details
2. The firewall will forward connects to port 21 to the internal server port
21 and will forward range 50000-55000 RELATED ESTABLISHED ONLY connects to
inside. (Check iptables doc on ways to do that)

It worked quite well.

HTH
Anand


> I cant seem to find concise information on doing this, I wish to have a
> ftp server on a box behind a dynalink dsl router and a firewall/gateway
> that uses iptables. Any help, pointers to TFM etc, appreciated.

> regards max


 
 
 

1. FTP server behind linux firewall communicating w/ FTP behind linux firewall

I have a Windows-based FTP server (G6) behind a linux firewall box
running ipchain and ipmasqadm portfw rules to enable communication
with the out side world. I can connect to this server from the
outside, but PASV doesn't work. I have rules that allow ports above
1023 for the PASV traffic and I also had put the FTP server on a
haigher port other than 21.  I portfw'd the same port through to the
internal Windows machine running the ftp server as well as forwarding
the ftp-data. I have the ip_masq_ftp module loaded. I'm not sure why
PASV doesn't work.

Also, the other thing I'm trying to get working is communicating with
this same FTP server from a client within another linux-firewalled
(also using ipchains and portfw rules) LAN. I can connect, but can't
get any data transfers going, including directory listings, using
either PASV or regular FTP. I'm not sure if I should be forwarding
ftp-data to the internal machine running the ftp client.

What I ultimately want to do is be able to connect from a client
within on linux firewalled LAN to an ftp server inside another linux
firewalled LAN on a non-standard port and using PASV if possible. Any
help would be appreciated.

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