iptables
 

I am reading different facts so I am a little confused. When you add some stuff to the iptables, do you have to restart it? If so, would any current services on the machine be affected, ie web service? I need to open ports for backup agent.

Cento 5.5 in question


execute /etc/init.d/iptables restart


tntrac

Personally I've always restarted iptables after modifing the rules.

# service iptables status

see if your new rules are there. If not then restart is required.

Let's say if a restart is needed, would it affect other services (downtime) during the restart? Like web service?

Thank you for the response.

if you do
Then it should only restart iptables unless you got some kind of custom init script which I you probably don't. you web and other services should be just fine.