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How To Open a Port on CentOS 5


Nathan
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I needed to open a certain outgoing port on my CentOS 5 server. Now that I know how I figured I would share with you.

 

It's really pretty simple. First you will need to login to your server via SSH. I use Putty. After that su - to root.

 

Open Outgoing Port:

iptables -A RH-Firewall-1-OUTPUT -p tcp -m state --state NEW -m tcp --dport 65 -j ACCEPT

 

Open Incoming Port:

iptables -A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 65 -j ACCEPT

 

Once done you need to save your iptables by running this command:

service iptables save

 

Now restart the service:

/etc/init.d/iptables restart

 

That's it your done!

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