[CentOS] Putting nat routing into place permanently? -- service iptables save

Preston Crawford me at prestoncrawford.com
Tue Nov 1 16:53:35 UTC 2005

On Tue, 2005-11-01 at 08:38 -0800, Bryan J. Smith wrote:
> Preston Crawford wrote:  
> > What's the canonical way to do this in CentOS/RHEL? I
> > know how to do it from the command line, but how to do
> > I make a NAT route permanent?
> Tom Brown <tom.brown at goodtechnology.com> wrote:
> > rc.local ?
> Actually, for newer kernel 2.4+ Fedora-based distros
> (including CentOS 3+), it's recommended you use the "service
> iptables save" (or "/etc/init.d/iptables save").

Oh, interesting.

> It basically parses the currently configured tables in the
> kernel and outputs them (in short-hand form) to the
> configuration file /etc/sysconfig/iptables.


> Then configure the iptables script to start at boot for
> run-levels 2+.  FYI, I'm not sure what happens to any "saved

Okay, here you lost me. Are you saying we run /etc/sysconfig/iptables at
boot for the various runlevels?

> changes" if you re-configure /etc/sysconfig/iptables from the
> "Firewall Setup" though.  So do that with care.

Okay. Thanks.


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