[Nottingham] Port forwarding with iptables

[Phil Lakin]

On Tue, 2003-04-29 at 16:36, Steve Goodliff wrote:

> Maybe the router isn't sending its responses  back to the redhat box ? but
> trying to directly send to the workstation on the 10.x network which it cant
> reach.
> 
> 

Hi,

If tcpdump isnt picking up any returning packets, the data must be going
in a different direction.

Sounds like the adsl router is trying to send the response down the
wrong pipe.. Can you check the routing table on the adsl router ?

Why not just allow selective forwarding to the routers http ports,
instead of trying to dnat from your internal network to the external
network ?

also, check /etc/sysctl.conf 
and make sure net.ipv4.ip_forward is set to 1

Phil