How to open ports on Cent OS/Fedora/Red Hat
To open port XY
Open flle /etc/sysconfig/iptables:
# vi /etc/sysconfig/iptables
Append rule as follows:
-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport XY -j ACCEPT
Save and close the file. Restart iptables:
# /etc/init.d/iptables restart
Verify that port is open
Run following command:
# netstat -tulpn | less
Make sure iptables is allowing port connections:
# iptables -L -n
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