MASQUERADE HELP!

[ryansdv]

Hi! I'm new with Linux. I have a linux gateway with 2 NIC.
In order to share the internet connection of eth0 to eth1 I always run this script below mannually. Please help me were would I put this to automically run everytime I restart.

iptables --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE
iptables --append FORWARD --in-interface eth1 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward

Thank you and more power.

 

[santanudas]

It’s depending upon the flavour of Linux you are using. If you use RedHat then it could be placed in the file ‘/etc/rc.local’ Just add those line at the end.

Cheers!!

 

[flugh]

On my Fedora Core 2 box, there's something like /etc/networking/ifup.d/ (something like that). Basically, you put the scripts you want run in there when an interface comes up.

Sorry. I'd be more verbose, but somebody lost their mind and booted my box into Windows for a bit and I'm flying blind ;-) That might get you started in the right direction though.

----
JBR

 

[ericbrunson]

Actually, it you're using fedora you should already have an /etc/init.d script for iptables. If you make the changes you want to your iptables and then issue the command 'service iptables save', then the next time iptables is started with the init script, the state will be restored. That should work in RH, also.

 

[ryansdv]

Actually I'm using Red Hat, so I'll take the advice of santanudas. And I'll take note also the advice for other linux flavor.

To you all, thank you very much and more power!

 

[ericbrunson]

That should work in RH, also.

As far back as RH 8.