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

[Joseph Mack NA3T]

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 at infernix.net
> RCPT TO: root at 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

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Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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