Firewall Wizards mailing list archives
RE: iptables dnat problem
From: "Luke Butcher" <Luke.Butcher () alphawest com au>
Date: Thu, 9 Feb 2006 09:02:28 +1100
Hi Michael, I suspect it's because you haven't specified the destination address. Maybe try something like the following iptables -t nat -A PREROUTING -d $SECOND_IP_EXT -p tcp -m tcp --dport 25 -j DNAT --to-destination $SECOND_IP_INT:10025 Luke Butcher Network/Security Consultant www.alphawest.com.au -----Original Message----- From: Michael [mailto:michael () insulin-pumpers org] Sent: Sunday, 5 February 2006 5:30 AM To: firewall-wizards () honor icsalabs com Subject: [fw-wiz] iptables dnat problem I have a mail daemon running on a border system bound to port 25, INADDR_ANY I'd like to run another smtp daemon on a virtual IP address on the same system. I have the new daemon running on port 10025 iptables -t nat -A PREOUTING -p tcp -d $SECOND_IP -dport 25 REDIRECT --to-port 10025 The daemon responds just fine to other hosts located on the same /24 as the localhost, however remote hosts a hop or two away never seem to get connected. This method seems to work fine for UDP ... I run a second name server on this host configured as an RBL. Suggestions ??? Michael _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- iptables dnat problem Michael (Feb 07)
- Re: iptables dnat problem Juan Pablo Feria Gomez (Feb 08)
- <Possible follow-ups>
- RE: iptables dnat problem Luke Butcher (Feb 20)
- RE: iptables dnat problem Michael (Feb 09)