Firewall Wizards mailing list archives
RE: Load Balancing
From: "Daniel Chemko" <dchemko () smgtec com>
Date: Thu, 18 Nov 2004 14:34:17 -0800
I know this is a very easy problem to fix, but I apparently am losing
my
mind and cannot think.
This question should really be sent to netfilter () lists netfilter org but I'll bite anyways. Because both computers are on the same subnet, the destination computer will try to directly send the message to the source machine. This'll break CONNTRACK in Netfilter, and it'll make the packet path look like a triangle if it works at all. In roder to fix the problem, you'll need to SNAT the packet on the server as well as DNAT which you're already doing. Eg: iptables -t nat -A PREROUTING --destination $dstpc_fake -j DNAT --to $dstpc_real iptables -t nat -A POSTROUTING --destination $dstpc_real --source $local_net/$local_msk -j SNAT --to $local_fw_ip You will loose all the source ip specifications on the detination box, but it's the only way to properly do it. _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Load Balancing Nathaniel Hall (Nov 18)
- Re: Load Balancing Mark Tinberg (Nov 18)
- <Possible follow-ups>
- RE: Load Balancing Daniel Chemko (Nov 18)