Here's my experience on actively contributing in the resolution of a problem related to Active FTP & gnu-linux/ip-tables based firewall solution. First, make sure your firewall has loaded the following modules:


Then check that the right Forwarding rules apply:

iptables -I FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT

being "RELATED" the important part. Hope it saves the day to someone...mines already got lost :(

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Do you Active FTP through Firewall+NAT ?
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