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Do you Active FTP through Firewall+NAT ?

November 23rd, 2007 by Andrea Matesi 1823 Views

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:

ip_conntrack_ftp
ip_nat_ftp

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 :(

Senior Professional Network and Computer Systems Engineer during work hours and father when home.

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Posted in LINUX, System Administration | 3 Comments »

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