Hello,

look at directory /proc/sys/net/ipv4 and check the value in the file
ip_forward.
The value must be set to 1.

regards

Steve
----- Original Message -----
From: <romba@fem.maschinenbau.uni-dortmund.de>
To: <suse-security@suse.com>
Sent: Monday, October 18, 1999 10:50 AM
Subject: [suse-security] Firewall/router - doesn't forward


>
> Hello!
>
> We are currently trying to build a packet filtering firewall using
> SUSE Linux 6.2 and ipchains. The hardware used is a Pentium 133 with
> two Level One NICs using the Realtek 8139 chipset.
>
> >From what we read in the literature (Firewall and Ipchains HowTo,
> several articles in the german magazine ct etc.) it seemed quite
> manageable, but then reality struck.
>
> After several successless tests with a bigger installation  we set up
> an installation almost identical to the one shown in part 6.3 of the
> "Firewall and Proxy Server HOWTO" written by Mark Grennan, the only
> difference being the IP-adresses for the outside part.
>
> Our setup passes all the tests described except one - it doesn't
> forward.  I can ping any computer from the firewall/router, I
> can ping both sides of the firewall from the LAN, but I can only ping
> the outside adress from the outside and I can't get through it.
> IP-forwarding is switched on and all default policies in ipchains are
> set to ACCEPT.
>
> We are quite desperate (and my boss is losing patience), so any ideas
> are highly welcome. Might it be useful to try some other network
> adapters? Is there something we have overlooked? Is there a fault in
> the HOWTO?
>
> Best regards
>
>
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