Setup looks like this
Internet
^
Redhat 9 iptables nat/masq (200.200.200.200 public address = eth1;
192.168.2.1 private address = eth0)
^
windows web server (192.168.2.254) | windows clients. (all 192.168.2.X)
Now the rh box is masquerading for the private boxes. Only thing not
standard is that any inbound http connections to the public address
200.200.200.200 is being dnatted to 192.168.2.254 which is the address of
the windows server. This is working as expected. The problem arises when a
internal client tries to connect to the public website.
For instance client request www.mycompany.com and DNS says go here
200.200.200.200 which would be correct if I was sitting on the outside
looking in. I need iptables to basically say if any http request comes from
the internal network addressed to my public address dnat the public
200.200.200.200 to the private address. I have tried the following without
success. Only other thing I know is to setup a internal DNS just so the
internal clients get the internal address. That would however be an extreme
waste of resources.
-A PREROUTING -i eth1 -d 200.200.200.200 -p tcp --dport 80 -j
DNAT --to-destination 192.168.2.254
Can someone help?
Bryan
