ipvs + source nat

[trietz]

Hi,

a few days ago I post these problem: 
http://archive.linuxvirtualserver.org/html/lvs-users/2006-10/msg00053.html
<http://dict.leo.org/ende?lp=ende&p=/gQPU.&search=unfortunately>
Unfortunately i didn't get an answer. After testing i assume it is a 
timeout problem.
I think the procedure is the following:

1. Client creates a smtp connection over the director to the realserver, 
which works perfect

2. Connection hang for a while and times out

3. Realserver try to close the connection, but the director doesn't 
"SNAT" the package

It looks like the director forgot the connection, cause the timeout from 
the realserver is longer than the timeout from the director.

Has anybody operating experience with lvs and tcp timeouts?
Can i drop the packages with internal source ip on the external 
interface of the director?

Thanks in advance,
Thomas