[isalist] Re: SMTP Connection Closed
- From: "Greg Mulholland" <gmulholland@xxxxxxxxxxxx>
- To: <isalist@xxxxxxxxxxxxx>
- Date: Fri, 19 Jan 2007 13:54:02 +1100
http://www.ISAserver.org
-------------------------------------------------------
hmm that rules that out.
----- Original Message -----
From: "ISA" <ISA@xxxxxxxxxxxxxxxx>
To: <isalist@xxxxxxxxxxxxx>
Sent: Friday, January 19, 2007 1:48 PM
Subject: [isalist] Re: SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
Nope! The only thing I changed was the NOOP to 20 (per Thor's advise).
First time I ever messed around with the Proto filters. Exchange box:
Dell PE2800 2GB mem. ISA: Dell PE1430 1GB mem. Both doing nothing but
handling mail for 3 mail accounts.
Joseph Danielsen, MCSA-Messaging, MCP
-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
On Behalf Of Greg Mulholland
Posted At: Thursday, January 18, 2007 9:42 PM
Posted To: ISA
Conversation: [isalist] Re: SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
gotta be some sort of connect limit, i would have thought noop as well.
Have
you customised any of your smtp rules or smtp filters beyond the normal
setup? have you customised any of the settings exchange connection
limit
settings
whats the hardware specs of the exchange box and isa box?
how long do you wait for the before banner before closing the window?
Greg
----- Original Message -----
From: "ISA" <ISA@xxxxxxxxxxxxxxxx>
To: <isalist@xxxxxxxxxxxxx>
Sent: Friday, January 19, 2007 1:29 PM
Subject: [isalist] SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
Nothing at all -
I enter telnet mail.domain.com 25 (hit enter) the line disappears and
the curser just sits there and blinks - no banner - nothing. If I hit
enter again it goes back to the C:\ prompt.
I tried the steps in that article mentioned earlier - but I can't get
passed the first step (mentioned above). However, I see the port 25
attempt on the ISA firewall logs - then is CLOSES after 5 seconds.
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com
-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx]
On Behalf Of Thor (Hammer of God)
Posted At: Thursday, January 18, 2007 9:24 PM
Posted To: ISA
Conversation: [isalist] SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
What actually happens when the telnet session is initiated? Do you see
anything? Any connect at all?
t
On 1/18/07 6:10 PM, "ISA" <ISA@xxxxxxxxxxxxxxxx> spoketh to all:
http://www.ISAserver.org
-------------------------------------------------------
Thanks guys - I'll follow the article is see what goes -
Did anyone have any problems actually connecting?
I also thought of MTU issues. Two of the sites that can not connect;
one
is fronted with a SonicWall, the other a Linksys (stop, don't even say
it... I know).
Joseph Danielsen, MCSA-Messaging, MCP
-----Original Message-----
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx]
On Behalf Of Greg Mulholland
Posted At: Thursday, January 18, 2007 8:58 PM
Posted To: ISA
Conversation: [isalist] Re: SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
I'm wondering if he is experiencing any other signs of flaky internet
connection. Like in browsing etc etc. Ive seen mtu issues do this.
Greg
----- Original Message -----
From: "Thor (Hammer of God)" <thor@xxxxxxxxxxxxxxx>
To: <isalist@xxxxxxxxxxxxx>
Sent: Friday, January 19, 2007 12:49 PM
Subject: [isalist] Re: SMTP Connection Closed
http://www.ISAserver.org
-------------------------------------------------------
But that wouldn't have anything at all to do with telnetting to 25,
which
I
can do, but I now see that others cannot. A blacklist or etc will
not
affect that.
t
On 1/18/07 4:29 PM, "Amy Babinchak" <amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
spoketh
to all:
It only effects incoming email.
You can get around it by using a smarthost. Your cable company
probably
allows
you to use their server for such purpose. That's how I get around
it.
________________________________
From: isalist-bounce@xxxxxxxxxxxxx on behalf of ISA
Sent: Thu 1/18/2007 7:22 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] SMTP Connection Closed
I thought that would affect my outgoing mail - not incoming!
<unfortunately I can't get a static IP for another few months, I
will
then>
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com <http://www.networkblade.com/>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/image001.jpg>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/image002.jpg>
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx]
On
Behalf Of Amy Babinchak
Sent: Thursday, January 18, 2007 7:20 PM
To: isalist@xxxxxxxxxxxxx
Subject: RE: [isalist] SMTP Connection Closed
according to dsnstuff.com you are listed on 3 blacklists and have no
reverse
DNS entry. That's enough right there to cause you to have
inconsistant
incoming email issues.
________________________________
From: isalist-bounce@xxxxxxxxxxxxx on behalf of ISA
Sent: Thu 1/18/2007 7:06 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] SMTP Connection Closed
Amy:
DNS seems to be working (mail.networkblade.com resolves to the
correct
IP),
"I" am not blacklisting and I don't know how to Grey list.
The ISP (cable company) is always suspect of everything else.
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx]
On
Behalf Of Amy Babinchak
Sent: Thursday, January 18, 2007 7:02 PM
To: isalist@xxxxxxxxxxxxx
Subject: RE: [isalist] SMTP Connection Closed
So assuming that this used to work you've eliminated the other
obvious
things
besides filtering like bad DNS, flakey ISP, blacklisting, grey
listing,
etc?
________________________________
From: isalist-bounce@xxxxxxxxxxxxx on behalf of ISA
Sent: Thu 1/18/2007 6:46 PM
To: isalist@xxxxxxxxxxxxx
Subject: [isalist] SMTP Connection Closed
Good questions!
Thor: I was referring to Exchange filtering NOT ISA. I was not aware
of
the
NOOP config in the SMTP filter properties.
Amy: By client I mean another account with a separate ISP and
Exchange
server
somewhere else in the world. i.e. NJ.
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com <http://www.networkblade.com/>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/%20>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/%20>
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx]
On
Behalf Of Thor (Hammer of God)
Posted At: Thursday, January 18, 2007 6:40 PM
Posted To: ISA
Conversation: [isalist] SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
Just to make sure we're saying the same thing.. Not filtering via
Exchange and
3rd party- the ISA SMTP filter. You disabled that?
t
On 1/18/07 3:30 PM, "ISA" <ISA@xxxxxxxxxxxxxxxx> spoketh to all:
Thor - thanks but I've turned off ALL filtering via Exchange and 3rd
party
software.
I've tried connecting (via telnet) from multiple locations (ISP) and
from
Exchange 2003 and SBS 2003. Some work and Some don't. When watching
the
ISA
real-time logs, the connection is initiated then 5 seconds later it
is
then
closed by the Exchange publishing rule.
A 12-pack for the one who gets this one!
<and this is on my own server/network>
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 08873
732-213-0600
www.networkblade.com <http://www.networkblade.com/>
<http://www.networkblade.com/>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/%20>
<https://harbor.bounceme.net/Exchange/amy/Drafts/RE:%20[isalist]%20SMTP%
20Conn
ection%20Closed.EML/1_multipart/%20>
________________________________
From: isalist-bounce@xxxxxxxxxxxxx
[mailto:isalist-bounce@xxxxxxxxxxxxx]
<mailto:isalist-bounce@xxxxxxxxxxxxx%5d> On Behalf Of Thor (Hammer
of
God)
Posted At: Thursday, January 18, 2007 6:22 PM
Posted To: ISA
Conversation: [isalist] SMTP Connection Closed
Subject: [isalist] Re: SMTP Connection Closed
Check your SMTP filter settings for command lengths... NOOP has been
problematic before at its default of 6 - I changed mine to 20 after
sniffing
traffic and determining some older Exchange boxes were padding NOOP
with
spaces..
t
On 1/18/07 1:46 PM, "ISA" <ISA@xxxxxxxxxxxxxxxx> spoketh to all:
Hope someone can help!
I think this is an ISA 2004 (patched) issue.
From some clients I can send/receive email just fine (and telnet
port
25). But
from other clients I can not. I monitored the ISA logs and observed
the
connection initiated then being closed.
From Exchange 2003 box I shut of IMF and GFI services - still not
luck
receiving email or telnet'ing from a particular client.
Any ideas would be greatly appreciated.
Respectfully
Joseph Danielsen, MCSA-Messaging, MCP
Network Blade Inc.
49 Marcy Street
Somerset, NJ 0887
732-213-0600
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