Outlook Slow after installing Firewall

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Guest

Hi all

We have a subsidiary company's network that connects to our network to access mail over a gigabit link.
Mail is hosted in Exchange 5.5 server that is common for both the networks.
But the subsidiary is having a seperate Domain under the common AD forest.

We implemented a Firewall to isolate the 2 networks and ever since we have one problem.

In the XP PCs Outlook 2000 is running very slow. Especially, when a user right-clicks on a file and select "Send to mail recipient as attachment" it takes 3 minutes for the window to appear. But the problem is not seen in Win98/2000 PCs in the same network with Outlook 2000.

The firewall is configured to allow all traffic from the clients to the Exchange server and the Domain controller and vice-versa and no denials are happening.

Another observation is, when I stop/disable the firewall the performance is good as with other users.

I have tried modifying the RPC client protocols and the Exchange provider. Also checked the Name resolution. Still no solution.
I feel this is related to Firewall and XP interoperability.

Can somebody help me in this?

Regards
Venkat
 
Hi Venkat,

What firewall are you using??

-----Original Message-----
Hi all

We have a subsidiary company's network that connects to
Click to expand...
our network to access mail over a gigabit link.
Mail is hosted in Exchange 5.5 server that is common for both the networks.
But the subsidiary is having a seperate Domain under the common AD forest.

We implemented a Firewall to isolate the 2 networks and
Click to expand...
ever since we have one problem.
In the XP PCs Outlook 2000 is running very slow.
Click to expand...
Especially, when a user right-clicks on a file and
select "Send to mail recipient as attachment" it takes 3
minutes for the window to appear. But the problem is not
seen in Win98/2000 PCs in the same network with Outlook
2000.
The firewall is configured to allow all traffic from the
Click to expand...
clients to the Exchange server and the Domain controller
and vice-versa and no denials are happening.
Another observation is, when I stop/disable the firewall
Click to expand...
the performance is good as with other users.
I have tried modifying the RPC client protocols and the
Click to expand...
Exchange provider. Also checked the Name resolution. Still
no solution.
 
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