Problems with Passive mode on PROFTP behind firewall
Posted on 2001-07-17
I have a problem where I cannot connect to a proftp server in passive mode behind a firewall, the /var/messages file reports SECURITY VIOLATION: Passive connection from x.x.x.x rejected when the server tries to initiate passive mode.
Non passive mode connections are fine, but I have some customers who need passive mode.
I have set the passive ports directive in proftpd.conf, and ensured that the relevant ports are open on the firewall, but still can't get the server to do anything useful in passive mode. It eventually times out, saying that no transfer has taken place.