On Mon, 9 Dec 2002, Alexandros Papadopoulos wrote: > /sbin/iptables -P OUTPUT DROP > > ##################### > #### CHAIN INPUT #### > ##################### > > ## Accept everything incoming on loopback interface > /sbin/iptables -A INPUT -s 127.0.0.1 -d 127.0.0.1 -i lo -j ACCEPT > > ## Accept all incoming traffic from related or established connections > /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT > > ## Allow connections to our ftp server > /sbin/iptables -A INPUT -p tcp --dport 2121 -j ACCEPT > > ..but still, the packets with the SYN flag set when the client tries to > establish the new data connection are dropped. Someone please tell me > what am I missing? I'm sure it's something obvious but I can't seem to > find it! What about the rules in the OUTPUT chain? Regards, Jozsef - E-mail : kadlec@blackhole.kfki.hu, kadlec@sunserv.kfki.hu PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt Address : KFKI Research Institute for Particle and Nuclear Physics H-1525 Budapest 114, POB. 49, Hungary