Routing Question 1

[RoryJMcKenna]

I have a Linux box running Red Hat 9... I have a PPPOE connection setup and have four static IP's to play with... What I am trying to accomplish is getting my Linux box to route traffic from ETH1 to PPP0.

I can ping ETH1 from the internet but I cannot ping anything from ETH1...

Could anyone tell me what my route statement needs to say.


Thanks!

 

[thedaver]

Don't bother writing it yourself, use a stable product

Jay's Firewall

http://firewall-jay.sf.net/

http://www.surfinbox.com/dir.php

 

[ericbrunson]

Actually, it doesn't matter what tool you use if the upstream (towards the internet) devices don't know to use your eth1 as the gateway for the ppp ip addresses. What are the subnets and masks?

 

[RoryJMcKenna]

Hi I have tried the jay-firewall... This is great but I need to just act as a Router... I dont want to do NAT at all. The outside world should be able to ping the boxes on the other side of the gateway box.

Any Ideas??

 

[ericbrunson]

Make sure ip-forwarding is enabled. I assume since you ignored my last post that your upstream routing is correct.

cat /proc/sys/net/ipv4/ip_forward

It should say '1'. If it doesn't:

echo 1 > /proc/sys/net/ipv4/ip_forward

 

[RoryJMcKenna]

Thanks very much!!!! that was the best tip I got all day!

 

[RoryJMcKenna]

one more thing.. Where do I set that to default to "1" on boot?

 

[sleipnir214]

Look in /etc/sysctl.conf

You will see a line which reads:

net.ipv4.ip_forward = 0

Change it to read:

net.ipv4.ip_forward = 1





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