The setup:
* A LAN with several PC's, an NT web server using IIS
* A Linux (RedHat), router with 2 NIC's, one connected to the DSL modem, the other connected to our LAN.
* All our PC's on the LAN can access the internet through the default gateway.

What works: Users outside our LAN can access our web site through the internet just fine. Inside users can also access our web site using the local IP of the web server.

What does NOT work: Inside users cannot correctly display HTML pages on our web that have href commands that point to jpg files on our web server. That is because the HTML code contains the IP address of our router. In other words the IP address someone would use to point to our web server from the outside.

How can I fool the LAN side PC's into thinking they are browsing the web from the internet? A couple people said I would have to use IP fowardwarding. We used to have a Netopia router which did the trick, but ever since the Northpoint fallout, we have been trying to get the Linux router to do what the Netopia did in the past.

Any help would be greatly appreciated!!

Thanks

Wes:

ipchains -P forward DENY

ipchains -A forward -s 192.168.0.0/24 -d 0/0 -j MASQ


thats it


you also need to set forward to 1

[david@xxxxxx /]$ cat /proc/sys/net/ipv4/ip_forward

1

[david@xxxxxx /]$

if it says 0 do this

[root@xxxxxx /]# echo 1 > /proc/sys/net/ipv4/ip_forward