Hi Ernesto, hi everybody,
_fwd="iptables -A FORWARD" _nat="iptables -A POSTROUTING"
Postrouting is in the nat table, so you have to add "-t nat" to _nat and make it
_nat="iptables -t nat -A POSTROUTING"
I'm having a problem to access internet ftp servers from my internal network. I understand the ftp connection but I don't have enough information about ip_conntrack_ftp and ip_nat_ftp modules, so here is my situation.
Apart from that you will need more rules for FTP, that's the tricky part. What worked well for me was using vsftpd with a port specifiaction for the data connections and allow these ports in INPUT|FORWARD. It may work using the ftp conntack module, but I don't know anything about that. You will have to add some port 20 rule, though.
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