SSL VPN:Poor performance & memory resources

[Mr. Magoo]

I notice that I connect via SSL VPN to my organization.
Then I launch RDP (Remote Desktop) and connect to my machine at work.

In the first 15 minutes or so, response time is great.
Then gradually I notice that things slow downgraphics in documents do not
appear as promptly anymore, I attempt to reply to e-mails and it takes
seconds untill I see the window to let me type, etc. I am using Vista with
1GB RAM memory. I have a co-worker using XPSP2 from a machine with 1GB RAM
and he reports same behavior when using the SSL VPN.

I notice that if I reboot my machine, I connect again to the same RDP
session and response time is good. Then I start using my machine at work via
RDP, and things slow down again.

My question is:
How sensitive is a client machine if SSL (in this case, SSL VPN) process is
in place? I know SSL is intense on the server side and I do have an SSL
acceleration card on the VPN gateway, but I would like a confirmation on
whether an SSL connection like this would also make memory a more sensitive
resource. My user experience with my machine is fine other than this, and
therefore I am trying to determine whether limited memory in the client side
could be the cause of this.

 

[S. Pidgorny]

Well, it depends. Many things can go wrong between VPN client and the
server, as well as on the VPN server. If you can temporarily configure
another VPN server, and use some other TCP-based service other than RDP, you
can create performance baseline and pinpoint the root cause. You may also
wish to monitor the VPN server performance metrics like processes memory and
CPU during the session.

You don't give enough details, and the nature of the issue - "slow rendering
on RDP client" - really don't give much space for more advice.

--
Svyatoslav Pidgorny, MS MVP - Security, MCSE
-= F1 is the key =-

* http://sl.mvps.org * http://msmvps.com/blogs/sp *

"Mr. Magoo" <MrMagoo@discussions.microsoft.com> wrote in message
news03CB730-1158-4238-89EE-75CCAEE74A70@microsoft.com...
>I notice that I connect via SSL VPN to my organization.
> Then I launch RDP (Remote Desktop) and connect to my machine at work.
>
> In the first 15 minutes or so, response time is great.
> Then gradually I notice that things slow downgraphics in documents do not
> appear as promptly anymore, I attempt to reply to e-mails and it takes
> seconds untill I see the window to let me type, etc. I am using Vista with
> 1GB RAM memory. I have a co-worker using XPSP2 from a machine with 1GB RAM
> and he reports same behavior when using the SSL VPN.
>
> I notice that if I reboot my machine, I connect again to the same RDP
> session and response time is good. Then I start using my machine at work
> via
> RDP, and things slow down again.
>
> My question is:
> How sensitive is a client machine if SSL (in this case, SSL VPN) process
> is
> in place? I know SSL is intense on the server side and I do have an SSL
> acceleration card on the VPN gateway, but I would like a confirmation on
> whether an SSL connection like this would also make memory a more
> sensitive
> resource. My user experience with my machine is fine other than this, and
> therefore I am trying to determine whether limited memory in the client
> side
> could be the cause of this.
>
>