I am trying to open a connection on a machine both ways. That is I am trying to open say the port 8001 and I did this.
iptables -A INPUT -p tcp –dport 8001 -j ACCEPT
Now how to configure so the server lets the outgoing packets generated by the program listening on 8001.
Best Answer
iptables -A OUTPUT -p tcp --sport 8001 -j ACCEPT
You can also use the connection tracking take care of it, with something like
iptables -A OUTPUT -m state --state ESTABLISHED -j ACCEPT
-- some people have preferences one way or the other, use whichever one suits you better.