ISA Clients, Slow Drive Access over ISA VPN

microsoft.public.isa.clients - Microsoft Internet Security and Acceleration


ISA Clients >> Slow Drive Access over ISA VPN

by Ben » Fri, 18 Nov 2005 22:37:47 GMT

Hi,

We've been using ISA as our VPN server for 6 months now, everything seems to
be working fine, but just recently people have been complaining of slow
drive access. Apparently it can take between 20 - 30 seconds, just to get a
directory listing of a small folder.
I used CMAK to create the client VPN connections, which specifies the
internal DNS server, and runs a logon script from the server.
Is there anything that I should check for, or anyway to speed it up?
This may just be down to more people using VPN since we have rolled it out,
if so not a lot we can do about it, (except wait for 24mb broadband). I just
want to rule out anything else that might be causing a problem.

Cheers

Ben


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ISA Clients >> Slow Drive Access over ISA VPN

by Sergio Fonseca [MVP] » Thu, 24 Nov 2005 06:00:55 GMT


Hi Ben,

Only folders enumeration are slow?

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ISA Clients >> Slow Drive Access over ISA VPN

by Ben » Thu, 24 Nov 2005 19:48:47 GMT

Hi Sergio

Folder enumeration & opening files. For example, MS Word 2003 automatically
points to the My Documents folder, if a user is working offline or in the
office, and opens work, then goes to "File > Open" the directory listing
opens instantly. However over the VPN doing the same action hangs word for
over a minute, as it seems to be looking across the VPN link, back at the
server.
I have set slow link detection in group policy to '20480' (which should be
mob broadband speed), anything slower shouldn't sync offline files.

Cheers

Ben
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ISA Clients >> Slow Drive Access over ISA VPN

by Sergio Fonseca [MVP] » Thu, 24 Nov 2005 21:13:57 GMT

Hi Ben,

Can you please dump a few "netstat -n" results while you try those slow
operations?


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