I have a small LAN and want to allow access to an internal(no real ip, sorry ;-)) web server to Internet clients
The gateway is using iptables v1.2.11(debian sarge) I have activated port forwarding, so that Internet traffic targeted at my gateway's port 80 is forwarded to the internal web server and works just fine. (To make things a bit clear: the Internet accesses the gateway through $INET_IP, the LAN accesses the gateway through $LAN_IP, the IP of the internal web server is $HTTPD_IP) What I also want, however, is to allow other LAN hosts have access to the same web server using the FQDN of the gateway(say http://mysite.dyndns.org). To do that correctly I must also SNAT LAN packets destined to $INET_IP of the gateway: iptables -t nat -A POSTROUTING -p TCP -i $LAN_IFACE -d $HTTPD_IP --dport 80 -j SNAT --to-source $LAN_IP Which gives me an error: iptables v1.2.11: Can't use -i with POSTROUTING Finally, I want to be able to contact the web server from the gateway through the FQDN as well. So I need to DNAT locally generated packets so that they are sent to the proper host: iptables -t nat -A OUTPUT -p TCP -d $INET_IP --dport 80 -j DNAT --to-destination $HTTPD_IP:80 Which also gives me an error: iptables v1.2.7a: Invalid argument Firstly, I would really apreciate it if someone could tell me what is wrong with rules 2 and 3? Secondly, is there a way to achieve this functionality? p.s. These rules are taken from Oscar Andreasson's extensive discussion of DNAT target in his "Iptables Tutorial 1.2.0", section 11.3 (http://iptables-tutorial.frozentux.net/iptables-tutorial.html). Thanks a lot in advance, Antonis ____________________________________________________________________ http://www.freemail.gr - äùñåÜí õðçñåóßá çëåêôñïíéêïý ôá÷õäñïìåßïõ. http://www.freemail.gr - free email service for the Greek-speaking. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
