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src_addr for outgoing NAT packets.

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: src_addr for outgoing NAT packets.
From: Joseph Mack <mack.joseph@xxxxxxx>
Date: Tue, 30 Jan 2001 16:40:55 -0500
In a VS-NAT LVS, the incoming packets are NAT'ed (or
whatever it's called) to the real-servers.

The returning packets are NAT'ed (in the opposite sense)
on the director by rules like

ipchains -A forward -p tcp -j MASQ -s realserver1 telnet -d 0.0.0.0/0

If there are several IP's on the outside of the director eg

192.168.2.1 eth0
192.168.2.110 eth0:1 (the VIP)

how does the director know to make the src_addr = VIP 
for the outgoing packet?

In general for a NAT box, how is the src_addr chosen for masqueraded
packets, when there are several IPs on the outside of the NAT box.

Joe


-- 
Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin
contractor to the National Environmental Supercomputer Center, 
mailto:mack.joseph@xxxxxxx ph# 919-541-0007, RTP, NC, USA


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