Greetings,
I am using Redhat 7.2 (2.4.7-10) with Iptables
(1.2.3) and I am attempting to forward my http traffic to an internal web
server.
I have successfully setup NAT and MASQUERAD'ing
for the internal network, but I am unable to forward any traffic.
Here is the firewall script I am using (it is not
complete and cheesy, but I am taking baby steps):
--
#!/bin/sh
#
## Script to setup the NAT on a IPTables based
firewall
#
modprobe iptable_nat
iptables -F
iptables -t nat -A
POSTROUTING -o eth1 -j MASQUERADE
echo 1 >
/proc/sys/net/ipv4/ip_forward
# Optional modules for NAT
modprobe
ip_nat_ftp
modprobe ip_nat_irc
--
The command I have been trying to use with
forwarding the http traffic to the internal web server is
this:
iptables -t nat -A PREROUTING -p tcp
--dport 80 -i eth1 -j DNAT --to-destination 10.100.1.250:80
With (as you most likely have guessed)
10.100.1.250 being the IP of my local internal web server, eth0 is internal
and eth1 is the external, I am able to ping the web server from the firewall
box and view the apache served pages from the firewall, but unable to forward
any external traffic.
Thanks for any help or pointers in
advance.
Regards,
Steven
