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Re: [lvs-users] LVS-NAT problems for SMTP cluster

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVS-NAT problems for SMTP cluster
From: Joseph Mack NA3T <jmack@xxxxxxxx>
Date: Sat, 3 May 2008 10:35:19 -0700 (PDT)
On Sat, 3 May 2008, Jason Ledford wrote:

> I am doing a smtp cluster and after I got the lvs part figured out, smtp 
> works just fine.  In your telnet session, how do you get as far as the mail 
> from and rcpt to if you aren't getting a response?  If you telnet to the 
> server does it respond with a banner?

I think there's the beginnings of the exchange in the HOWTO

> I've given LVS-DR a spin and that worked fine, but the issue with that
> is that outgoing SMTP messages (e.g. sendmail queue) would be sent from
> the various real server public source IPs.

what public IPs? For security, the only public IP on the 
realserver should be the VIP

> When I've done this, I am getting traffic all the way: client >
> (internet) > gateway 80.1.1.1 >  VIP on director > RIP on real server >
> back to director (ipvs?) > gateway 80.1.1.1 > (internet) > client.

so the LVS is working

> But telnet session initiated from the client looks like:
>
> HELO localhost
> MAIL FROM: infernix@xxxxxxxxxxxx
> RCPT TO: root@localhost
>
> No text is returned from the server. At all.

I don't really know what's going on. Since LVS is working, 
there must be something at the application layer. Is 
localhost a valid address in this context?

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
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