Thursday, January 20, 2011

How to allow secure mail SMTP ports at the firewall?

Following iptables rules will allow server SMTPS incoming client request (open port 465) for server ip address "server_IP" :

#iptables -A INPUT -p tcp -s 0/0 --sport 1024:65535 -d server_IP --dport 465 -m state --state NEW,ESTABLISHED -j ACCEPT
#iptables -A OUTPUT -p tcp -s server_IP --sport 465 -d 0/0 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT

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