Re: Custom application filter development ...
- From: "Nitin (Indigo)" <nagarwal@xxxxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Wed, 28 Aug 2002 19:59:13 +0530
1. No, Exchange server is not handling mail from the Internet
(using Smart Host for sending)
2. Currently no relay is allowed through Exchange server (but I can
set it to relay from machines on the subnet)
I implemented the logic of setting Exchange server as the Master and
configure all other SMTP servers to relay through Exchange but had the
following problem:
1. If a user neither uses Microsoft SMTP service on his machine nor
the Exchange Server to send mail but instead uses an external SMTP
server (say mail.yahoo.com) then how do I track that mail?
What do I do now?
Thanks
Nitin
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, August 28, 2002 7:35 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Custom application filter development ...
http://www.ISAserver.org
Is this Exchange server also handling mail from the Internet?
Does it limit who can relay through it?
If all you want to do is limit outgoing SMTP to a single server, then
create a Client Address Set, add the "master" Exchange server's IP to it
and limit the SMTP protocol rule to that Client Address Set.
Now you configure the remaining SMTP servers to relay through the
"master" and you get the tracking you want.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/pages/author_index.asp?aut=3
http://jalojash.org/isatools
Read the books!
----- Original Message -----
From: Nitin Agarwal <mailto:nagarwal@xxxxxxxxxxxxxxxxxxxx>
To: [ISAserver.org <mailto:isalist@xxxxxxxxxxxxx> Discussion List]
Sent: Wednesday, August 28, 2002 6:41 AM
Subject: [isalist] Re: Custom application filter development ...
http://www.ISAserver.org
Thanks Jim
But can't Exchanger server, on receiving a mail destined for another
domain, re-send the mail (or in other words forward the mail and act
simply like a relay agent). Otherwise is there any way that I can
achieve my goal of allowing only Exchange server to send mails out of
ISA (and redirecting mails from other SMTP servers to the exchange
server for further transport).
Thanks
Nitin
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: Wednesday, August 28, 2002 6:57 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Custom application filter development ...
http://www.ISAserver.org
That's a pretty complex design, since it also requires the main Exchange
server to accept mail destined for domains it doesn't hold.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://isaserver.org/pages/author_index.asp?aut=3
http://jalojash.org/isatools
Read the books!
----- Original Message -----
From: Nitin (Indigo) <mailto:nagarwal@xxxxxxxxxxxxxxxxxxxx>
To: [ISAserver.org <mailto:isalist@xxxxxxxxxxxxx> Discussion List]
Sent: Tuesday, August 27, 2002 10:18 PM
Subject: [isalist] Custom application filter development ...
http://www.ISAserver.org
Hi
I am trying to make a SMTP filter that would redirect all SMTP traffic
coming from the intranet (except from the Exchanger server) to the
Exchange server. Reason being I want to restrict only Exchange server to
be able to send mails (for tracking purposes). I also don't want to
configure other SMTP servers individually to relay to exchange server.
Just wanted to know if someone has made such/similar application filter
using ISA SDK.
Thanks
Nitin
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