[CentOS] blocking outgoing ports with iptables

T'Krin tkrin at tkrin.net
Sun Oct 30 03:27:22 UTC 2005

> Hi,
> I'm using the generic system-config-securitylevel-tui program on a
> remote server to configure my firewall.  So far it's been fairly decent,
> allowing me to open up ports and whatnot.  But I want to start blocking
> a couple of outgoing ports on my machine.  I want to lock it down so the
> only traffic going in our out of my machine is stuff that I specify.
> Is there a way to do this with the system-config-securitylevel program?
>   If not, what do you recommend I use to configure the firewall?
> thanks,
> ajay

I've  never seen a way block outbound ports using the config tool.  If you
are comfortable with the iptables syntax, you could edit
/etc/sysconfig/iptables to your liking and then restart the iptables


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