R: Postfix problem

From: Paolo Ercolani <paolo.ercolani_at_bsc.it>
Date: Thu, 14 Sep 2006 13:34:05 +0200

Thank you. But i have a problem using DNS, because we have a phisical device (Linkproof, anyone know it??) and we can't find the way to use multiple ip addresses for a name.
We are waiting a response from radware about that. So i was looking for another solution, PEN.
If i understood well, pen is better for http.


Da: Ulric Eriksson [mailto:ulric_at_siag.nu]
Inviato: mer 13/09/2006 17.18
A: Paolo Ercolani
Cc: pen_at_siag.nu
Oggetto: Re: Postfix problem

On Wed, 13 Sep 2006, Paolo Ercolani wrote:

> Hi,
> i'm trying to use pen for load balancing postfix, but i have a
> strange result. The client comes in with the local address, so
> i lose all the postfix security and postfix becomes an open
> relay. Anybody can help me?? Can i setup pen making it passing
> the right ip address to postfix???

Nope. ;-) And using a load balancer for mail is really, really

Why do I know this? Because we used to load balance incoming mail
using pen, until we realized that it is already built into smtp
and dns.

ulric_at_ulric-nx9420:~$ dig @maud qbranch.se mx

; <<>> DiG 9.3.2 <<>> @maud qbranch.se mx
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3017
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 6

;qbranch.se. IN MX

qbranch.se. 86400 IN MX 5 mail.365-24.se.

qbranch.se. 86400 IN NS maud.qbranch.se.
qbranch.se. 86400 IN NS grace.qbranch.se.
qbranch.se. 86400 IN NS

mail.365-24.se. 86400 IN A
mail.365-24.se. 86400 IN A
mail.365-24.se. 86400 IN A
maud.qbranch.se. 86400 IN A
grace.qbranch.se. 86400 IN A
kristina.qbranch.se. 86400 IN A

;; Query time: 3 msec
;; WHEN: Wed Sep 13 17:10:44 2006
;; MSG SIZE rcvd: 214

Received on Thu Sep 14 2006 - 13:42:52 CEST

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