On Fri, 2004-09-24 at 04:38, Higuera, Antonio wrote: > Hi, > I have a linux iptables fw with two interfaces: internal and external > (nating the internal traffic) with a public ip. In the internal > interface I have a ms exchange server that forward all the external mail > to the firewall via smtp. > - After setup the linux fw I had a cisco router nating the traffic to > internet and everything went fine. It seems therefore that the exchange > server works properly. > - With the linux machine everything works fine unless the outgoing > smtp.I can telnet the port 25 of the external server but something > happen once the smtp protocol has begun. In fact I can see with a > sniffer that the protocol stop when the external server send back DATA. > In this moment the local exchange stop of sending and the timeout is > reached. > - I tested other smtp applications to send out messages and work fine > with iptables. But what happens with exchange?: works with cisco but not > with iptables!! It's crazy!!! > Any ideas? > Thank you for your help posting your rules might help: iptables -t mangle -vxnL && iptables -t nat -vxnL && iptables -vxnL -- Jason Opperisano <opie@xxxxxxxxxxx>
