Hi , I'm trying to connect to an oracle 8.1.7 server behind a linux iptables firewall. I've opened the 1521/tcp port. the tnsping response is OK, but when i'm trying to connect with SQLPLUS, logs tell me SQLPLUS try to connect to a random port ( i think oracle server give sqlnet a port to connect to). I think sqlnet protocol is similar to ftp protocol. if it is the case, is there a ip_conntrack_sqlnet module to solve the problem. Could you tell me what to do to make this work? Thanks, Stephane