RE: Publishing Exchange Server - Weird Problem
- From: Dave Morrow <David.Morrow@xxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 30 Nov 2001 08:47:17 -0500
I'll check out that Hotfix. Thanks for the tip.
You're right, it does seem to be the Win98 clients that mostly experience
the problem. It's strange though, when the client connects to resolve the
hostname (entered as "exchange.mydomain.com") it successfully connects,
changes the servername to the NETBIOS name and confirms the mailbox name.
Then, when Outlook tries to actually connect to the mailbox, it fails. I
tried using the LMHOSTS file and that does cure the problem, but I really
would rather not place LMHOSTS files on all of my mobile users
laptops....know what I mean? I wonder if, for some reason after connecting,
and resolving the mailbox name, if the client is placing the private IP
address of the exchange server in the profile somehow????
-----Original Message-----
From: Iain.Mclaren@xxxxxxxxxxxx [mailto:Iain.Mclaren@xxxxxxxxxxxx]
Sent: Friday, November 30, 2001 4:41 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Publishing Exchange Server - Weird Problem
http://www.ISAserver.org
This problem may be related to one of a few issues
What version of O/S are the Outlook clients running?
If its anything older than Windows2000 then you will
need to apply MS Hotfix Q291000 to the ISA server,
as the RPC connect packets from older MS O/S's (win95 through NT4) don't
comply with ISA server's RPC filter.
However it could also be that the client isn't able to resolve the
Netbios name of the exchange server (the server name displayed after a
check mailbox name in the outlook client completes successfully) a quick and
easy way to test this is to enable the clients lmhosts file and add an entry
of the Netbios name of the exchange server being published and the IP
address of the ISA rule publishing it.
Iain
-----Original Message-----
From: Dave Morrow [mailto:David.Morrow@xxxxxxxxxxxx]
Sent: 29 November 2001 16:01
Subject: RE: Publishing Exchange Server - Weird Problem
Actually, I should have been more clear. The problem exists with an
Exchange Server client using RPC communications
-----Original Message-----
From: Muqeem Syed [mailto:Syed.Muqeem@xxxxxxxxxxxx]
Sent: Thursday, November 29, 2001 10:54 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Publishing Exchange Server - Weird Problem
http://www.ISAserver.org
the outgoing connection form the server is made to a random port on the
client side.. check to see if you have any outgoing protocol rule that
denies outgoing traffice on certain ports.. .. the incoming traffic to the
server is on port 25 but outgoing port could be any random port.. you might
want to check if there is any outgoing protol rule that defines to deny
traffic on those ports.
-----Original Message-----
From: Dave Morrow [mailto:David.Morrow@xxxxxxxxxxxx]
Sent: Thursday, November 29, 2001 4:40 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] Publishing Exchange Server - Weird Problem
http://www.ISAserver.org
I have this very strange problem with publishing an Exchange server behind
ISAServer.
I use the "Secure Mail Server" publishing wizard to publish my Exchange
server. Everything works fine with respect to POP/SMTP but Outlook clients
connecting to my server can only resolve their mailbox name (when they setup
their profile). When they launch Outlook it fails to connect to the server.
I know it can connect since it properly resolves the name and sets up the
profile.
David A. Morrow
Network Administrator
Autodata Solutions Company
David.Morrow@xxxxxxxxxxxx
http://www.autodata.net <http://www.autodata.net>
Phone: (519) 951-6067 Fax: (519) 451-6615
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