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Old 09-25-2001, 07:48 AM   #1
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Registered: Sep 2001
Posts: 1

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iptables redirect

I'm having problems getting iptables to redirect from my firewall to my web server. I have two NIC cards. eth0 for the internet and eth1 for my LAN. my kernel is 2.4.9 and I have all of the netfiltering options for IPv4 and IPv6 built into it.

I have tried these rules in all sorts of combos.

iptables -P INPUT ACCEPT

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -t nat -A POSTROUTING -o eth1 -s -d -j MASQUERADE
iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 80 -j DNAT --to-destination

#iptables -A FORWARD -s -d -i eth1 -o eth0 -p tcp --dport 80 -j ACCEPT
#iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 80 -j DNAT --to-destination
#iptables -t nat -A PREROUTING -i eth0 -s -p tcp --dport 80 -j REDIRECT --to-destination

When I connect to it from the internet it I have a long wait for the first connection (I generally reconnect) and then it gives me a "The page cannot be displayed message". When I connect to the server from my LAN I get the web page. I would appreciate any input on this.


Brett Hartnett
Old 09-26-2001, 09:11 PM   #2
LQ Guru
Registered: Jun 2001
Location: South Alabama
Distribution: Fedora / RedHat / SuSE
Posts: 7,155

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I have this line

iptables -A tcp_packets -p TCP -s 0/0 --dport 80 -j allowed

and this one

iptables -A INPUT -p TCP -i eth0 -j tcp_packets

hope it helps

Last edited by DavidPhillips; 09-26-2001 at 09:14 PM.


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