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Re: [FW-1] MS Outlook/SecureClient issue

Hi Jeffrey,

I believe this to be an MTU issue with the client machine (its actually a bug with the Linksys router not being able to handle fragmented UDP traffic). Reduce the MTU window size of the client workstation to resolve the problem, if you upgrade to SecureClient FP3 there is an exe file in the program files\securemote\bin directory called MTuadjust.exe that does exactly this.

best Regards

Andy


-----Original Message-----
From: ext Larson, Jeffrey [mailto:[email protected]]
Sent: Wednesday, December 11, 2002 9:22 PM
To: [email protected]
Subject: [FW-1] MS Outlook/SecureClient issue


We are experiencing Microsoft Outlook connectivity issues connecting to an
Exchange 5.5 server when the SecureClient client (NG fp2) resides behind a
Linksys (BEFSR41) router.  All other applications that are accessed seem to
function with no issues through the VPN tunnel.  We are using hide behind
NATing, via the Linksys, using private IP addressing with the WAN interface
using a DSL line via a PPPoE connection. This address is distinct from any
of our DMZ and internal private addresses.

When attempting to connect to the Exchange server via MS Outlook 2002, we
receive the following message box:

Outlook is retrieving data from the Microsoft Exchange Server <ServerName>.
You can cancel the request or minimize this message to the Windows taskbar
until Outlook closes the message automatically.

After the retrieval of data has completed (which takes 60 to 90 seconds),
you can view the content within the mailbox.  However, if you attempt any
action, such as forward the message, Outlook will again perform the
retrieval process above before sending the message.

We are experiencing these same delays with earlier versions of Outlook but
do not receive the message above.  The Outlook 97/98/2000 clients appear to
be in a hung state but  is experiencing the same issue as the Outlook 2002
client.  After approximately 60 - 90 seconds the Outlook 97/98/2000 client
functions normally until you attempt to perform an action, such as forward a
message.  When you attempt to forward a message, after approximately 60
seconds the following message is displayed;

Network problems are preventing connection to the Microsoft Exchange Server
computer.

When the SecureClient is directly connected to the DSL circuit, not residing
behind the Linksys router, all Outlook clients function normally.  I would
greatly appreciate any feedback on a possible resolution to this issue.

Thank You,
Jeffrey Larson

Senior LAN Technician
Michigan Millers Mutual Ins.CCNA  Network+
<mailto:[email protected]>

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