ip_conntrack_ftp and non-standard ports

I hope this isn't a FAQ. I've looked around and googled around, and so far, it seems from what I've found that such a thing can be done. What I don't know is just how to tell iptables to do it.

I hope someone might provide a pointer.

Quoted 4 lines · Brian Capouch

I hope this isn't a FAQ. I've looked around and googled around, and so far, it seems from what I've found that such a thing can be done. What I don't know is just how to tell iptables to do it.

This is done when loading the ip_conntrack_ftp and ip_nat_ftp kernel modules, eg.

modprobe ip_conntracl_ftp ports=21,2021,3021
modprobe ip_nat_ftp ports=21,2021,3021

(see "modinfo ip_conntrack_ftp")

Quoted 2 lines

I hope someone might provide a pointer.

Hope this helps...

Regards,
Filip

I was also told to edit the source of module.