I ran into this problem a while back, as first I thought m0n0wall was
messing with the ftp server. I later found out that if you try to ftp
through m0n0wall from behind another firewall, that's what the problem
is. Some switch/NAT/firewalls don't assign the dynamic trigger ports
properly which will cause the "LS" command and many others to fail. So
since it can't list files, the ftp client will report an error or no
connection. It doesn't matter if you use passive or active mode ftp, I
found this issue with certain type of D-Link switches. If you remove the
D-link from the loop, all of a sudden everything works like it should.
E-mail me and I can help test this for you, I have a few spare WAN IP
that I can hook directly to a PC to test ftp connections with a simple
guest account you could create for troubleshooting.
Joseph Lo wrote:
> Dear All,
> I know this is an age old question: how to setup ftp server behind monowall.
> I have searched the forum and read the monowall scratchpad. But I still can't get my ftp server to
work. I am hoping someone could enlighten me.
> Here is my setup.
> internet ----> monowall ----> switch ----> ftp server
> monowall is 192.168.1.1
> ftp server is 192.168.1.2. I am using FileZilla on windows XP as some have suggested.
> Here are my monowall config
> Firewall NAT Inbound
> lf proto Ext. port range NAT IP Int. port range Description
> WAN TCP 20 192.168.1.2 20 ftp
server port 20
> WAN TCP 21 192.168.1.2 21 ftp
server port 21
> WAN TCP 55000-61000 192.168.1.2 55000-61000 ftp server
> Firewall NAT outbound
> Interface source Destination Target Description
> WAN 192.168.1.0/24 * 192.168.1.2 ftp server
> Firewall rules
> Proto Source Port Destination Port Destination
> TCP * * 192.168.1.2 21 FTP
> TCP * * 192.168.1.2 55000-61000 FTP
> I have setup filezilla with passive mode settings
> External server IP address for passive mode transfer -> use the following IP -> 192.168.1.2
> I have also checked the tick box
> * Don't use external IP for local connections
> * use custom port range: 55000 - 61000
> When I use ftp client to connect to 192.168.1.2 it work. When I use ftp client from external lan
to connect to my dynamic IP, it can't find the ftp server. by the way, I am using monowall's dyndns
server. Pinging my hostname (eg. hostname.homeunix.net) from the net work.
> I have use Shield-up to check and it report that port 21 is open.
> I have tried many configuration and still can't get anything to work.
> Please help
> Thank you.
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