[isalist] Re: SMTP Outbound from different IP addresses
- From: "Thor (Hammer of God)" <thor@xxxxxxxxxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Tue, 4 Mar 2008 06:57:41 -0800
http://www.ISAserver.org
-------------------------------------------------------
Receiving is easy... The goal was for all of them to SEND with the same
IP, which you can't guarantee with ISA using multiple IPs on the
external interface.
t
> -----Original Message-----
> From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-
> bounce@xxxxxxxxxxxxx] On Behalf Of Han Valk
> Sent: Tuesday, March 04, 2008 5:39 AM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] Re: SMTP Outbound from different IP addresses
>
> http://www.ISAserver.org
> -------------------------------------------------------
>
> Mmm I asumed that those SMTP serverd also needed to receive SMTP
> traffic.
>
> ________________________________
>
> From: isalist-bounce@xxxxxxxxxxxxx on behalf of Jerry Young
> Sent: Tue 3/4/2008 1:36 PM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] Re: SMTP Outbound from different IP addresses
>
>
> I think this was for outbound traffic, not inbound.
>
> How would you ensure that the IP address ISA used to send mail to the
> Internet changed? I can't think of any way it could; unless it can do
> a
> one-to-one NAT.
>
> A non-ISA server solution is available, though.
>
> Three mail gateways with external interfaces on them are used in the
> mail
> traffic path both inbound and outbound. ISA could then sit between
> them.
>
> Would require 3 MX records, though, and some modification of the
> Exchange
> SMTP Connector (assuming Exchange inside) to use the mail gateways as
> smart
> hosts.
>
> Mail flow would then go Internet -> Mail Gateways -> ISA -> Exchange
> for
> inbound and Exchange -> ISA -> Mail Gateways -> Internet for outbound.
>
> Could get more clever with load balancing on either side but I figured
> less
> complexity with this example would help make it easier to understand.
> :)
>
>
> On Tue, Mar 4, 2008 at 5:45 AM, Han Valk <Han.Valk@xxxxxxxxxxxxxxx>
> wrote:
>
>
> http://www.ISAserver.org <http://www.isaserver.org/>
> -------------------------------------------------------
>
> Why not? Configure 3 different IP addresses on the external NIC.
> Configure 3
> different SMTP server publishing rules each pointing to
different
> IP
> address
> on the external NIC.
>
> ________________________________
>
> From: isalist-bounce@xxxxxxxxxxxxx on behalf of Thomas W Shinder
> Sent: Mon 3/3/2008 6:06 PM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] Re: SMTP Outbound from different IP addresses
>
>
> Hi Rob,
>
> That would be a nice feature. But no, you can't do that.
>
> Thomas W Shinder, M.D.
> Site: www.isaserver.org <http://www.isaserver.org/>
> <http://www.isaserver.org/>
> Blog: http://blogs.isaserver.org/shinder/
> Book: http://tinyurl.com/3xqb7 <http://tinyurl.com/3xqb7>
> MVP -- Microsoft Firewalls (ISA)
>
>
>
>
> ________________________________
>
> From: isalist-bounce@xxxxxxxxxxxxx
> [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Rob Moore
> Sent: Monday, March 03, 2008 10:47 AM
> To: isalist@xxxxxxxxxxxxx
> Subject: [isalist] SMTP Outbound from different IP
> addresses
>
>
> Hello all-
>
> ISA 2006 Standard.
>
> I'm guessing this is a fairly simple question. Hope so,
> anyway.
>
> We have three servers that do SMTP outbound. Is there a
> way to
> have
> each one send SMTP traffic from a different IP address on our
one
> ISA
> server?
> I'd like to isolate them to different IP addresses so when one
> gets
> blacklisted (as happened over the weekend) they don't all get
> blacklisted.
>
> Thanks,
> Rob
>
>
>
> ++++++++++++++++++++++++++++++++++++
>
>
> May your life preach more loudly than your lips.
> --William Ellery Channing
>
>
> ++++++++++++++++++++++++++++++++++++
>
>
> ________________________________
>
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>
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>
>
> --
> Cordially yours,
> Jerry G. Young II
> Microsoft Certified Systems Engineer
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