Re: Setup SMTP Filter
- From: "Jim Harrison" <jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Tue, 3 Jun 2003 09:00:39 -0700
Here's a good starting point:
ftp://ftp.rfc-editor.org/in-notes/rfc2821.txt
RFC's can be a pain to read until you get used to the format.
Then, they can be your best ally.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "Amy Babinchak" <Amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Tuesday, June 03, 2003 08:41
Subject: [isalist] Re: Setup SMTP Filter
http://www.ISAserver.org
This is a multi-part message in MIME format.
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I'm reading this thread with interest as I've been playing around with the
smtp filter trying to optimize it too. but I'm lacking in knowledge on the
smtp commands. Is there a good tutorial you would recommend?
Amy
-----Original Message-----
From: William Robertson [mailto:robertson.william@xxxxxxxxxxxxxx]
Sent: Tue 6/3/2003 10:20 AM
To: [ISAserver.org Discussion List]
Cc:
Subject: [isalist] Re: Setup SMTP Filter
http://www.ISAserver.org
Hi Jim
After enabling the SMTP Filter and setting the NOOP length to 20 bytes,
I then started getting the following alerts from my Firewall:
ISA Server alert: An unknown SMTP command
XXXX ASTPROXY01.AST.CO.ZA
XXXX TCEN-UL-MAILSV01.TELKOM.CO.ZA
XXXX SMTP.LANTIC.NET
XXXX NS2.DHV.NL
XXXX MFCS002.SAMANCORCR.CO.ZA
XXXX JS000414.JOBSERVE.COM
XXXX AVEROMAR01.POVOAHOLDINGS.COM
etc
etc
etc
Do you perhaps know where I may start trying to figure out what exactly
these commands are that I need to enable? (BTW, I have a linux-based
sendmail server - no fancy schmancy exchange servers for me :(
Thanks
William R.
-----Original Message-----
From: Jim Harrison [mailto:jim@xxxxxxxxxxxx]
Sent: 02 June 2003 16:41 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Re: Setup SMTP Filter
http://www.ISAserver.org
Generally, 20 is seen as a good upper limit for NOOP.
AUTH should be 1024, if you enable it.
Don't expect to screen HTML mail; the screener doesn't seem to like
them.
Jim Harrison
MCP(NT4, W2K), A+, Network+, PCG
http://www.microsoft.com/isaserver
http://isaserver.org/Jim_Harrison
http://isatools.org
Read the help, books and articles!
----- Original Message -----
From: "William Robertson" <robertson.william@xxxxxxxxxxxxxx>
To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
Sent: Monday, June 02, 2003 01:03
Subject: [isalist] Setup SMTP Filter
http://www.ISAserver.org
Hi there
My original installation of ISA Server excluded the setup of the SMTP
filter as I appeared to have problems with receiving mail etc. I have
now got some time on my hands ( yeah right.!) and would like to start
playing with it again.
I would like to know of any "out-the-box" tricks that I need to use to
get it working properly. I know for one thing that the default NOOP
value of 6 is apparently too small. Could someone please let me know
what a more acceptable NOOP setting is, as well as any other
variables/settings that I need to customise, or be on the lookout for.
Any reference to reading material to assist with the comprehension of
this topic would be a great asset.
Cheers
William R.
_____
William Robertson
AST Mpumalanga
Systems House / Consultant: Software
Tel: 013-2472703 / 083 638 0354
Fax: 013-2462236
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opinions are those of the sender unless clearly stated as being that
of Columbus Stainless. The person addressed in the e-mail is the sole
authorised recipient. Please notify the sender immediately if it has
unintentionally reached you and do not read, disclose or use the
content in any way. Whilst all reasonable steps are taken to ensure
the accuracy and integrity of information and data transmitted
electronically and to preserve the confidentiality thereof, no
liability or responsibility whatsoever is accepted if information or
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destination.
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