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Re: Elementary Woody Firewall with DSL.



On Thu, 2002-11-07 at 13:15, Dan.Hunt wrote:
> With this done I can Start and stop or restart the firewall, ping the Debian 
> GNU/Linux Woody box from the Woody DSL firewall, and ping back the 
> other way. I can ping the net from the firewall, but not from inside. 
> 
> Am I missing something important?

Hey, Dan.

Possibly. On the gateway try...

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

Then try to access outside from inside. If it works now, then you need
to setup packet forwarding on the gateway's kernel. The above line does
this on-the-fly. To do it on startup, edit /etc/network/options and
change ip_forward to 'yes'. You can make sure syn cookies and spoof
protection are on as well while you're there.

If this doesn't make the packets traverse the gateway properly, then
something else is wrong.

Kind Regards
Crispin Wellington

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