Issues with Remote
Desktop and Vista
There have been reported issues with accessing
Remote Desktop sessions from a Vista PC. Some commonly know issues
are:
1) Vista
makes use of TCP Window Scaling. This can cause compatibility issues
with some routers. It doesn't seem to affect web browsing for most
pages, but does affect remote desktop.
http://support.microsoft.com/kb/932134/en-us
Try updating the routers firmware. Many router
manufactures have released firmware updates with the following
"fix"; "Fixed the TCP Window Scaling issue with Windows Vista". You
may also want to review the manufacturers Vista router compatibility
lists. If there are no updates or they do not resolve the problem,
try testing by by-passing the client-side router, and connecting
directly to the modem. If doing so, make sure the Windows firewall
is enabled and Windows and virus updates are current before doing
so.
The following link outlines how to do make changes to TCP Windows
scaling within Vista, but to date I have not seen this resolve the
problem.
http://www.tech-recipes.com/rx/1744/vista_tcp_cannot_communicate_primary_dns_server
2) There is also a known "fix"
for some issues relating to connections, performance, Java, mail,
some web pages, and RDP from Vista, which is adjusting the TCP
receive, window tuning.
To display the current configuration, at a
command line enter:
netsh interface tcp show global
As a rule setting to "restricted" will resolve
the problem:
netsh interface tcp set global
autotuninglevel=restricted
If not, try disabling all together:
netsh interface tcp set global
autotuninglevel=disabled
To enable (the default is enabled/normal):
netsh interface tcp cp set
global autotuninglevel=normal
