Exchange over VPN connecting problems

[ruben]

After upgrading to Cisco AnyConnect v2.3.0254 Outlook on the clients will not connect to the Exchange like before.

I can RDP and Ping det exchange server, but Outlook won't connect. Even more strange is that after 10-30 min's of "waiting" Outlook suddenly connects and everything works perfect for the rest of the VPN session.

I have noticed that pinging the exchange server right away after VPN connects don't get any replay, while pinging the VPN router itself does. If I wait for about 30 seconds and ping the exchange server again it replays. It might get sense for some of you...?

[darkbeatzz]

are they vista clients?

[ruben]

Yes, Vista 64-bit

[darkbeatzz]

I have seen this before with checkpoint secure remote but it may work for you also as its more of an issue with rpc and vpn clients.

I implemented method 2 and it resolved the issue

http://support.microsoft.com/kb/899148

let me know how it goes

[ruben]

The following registry key was not there, but I created it (along with the string Server2003NegotiateDisable), however no better result.

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Rpc

After that I did allow all traffic for a short period through the firewall with no better result.

I have run "outlook /rpcdiag" and see that no rpc prossess connects. So the problem is around rpc.

I'm getting short of idéas here...

Also I still can't understand why pinging the server wan't respond before 30-60 sec of waiting after VPN connection is established (while pinging all other servers on the same net responds on first attempt).

[darkbeatzz]

suggest running tcpudmp or wireshark on client machine to see whats happening to the traffic.

http://stuffmate.com/download/tcpdump_for_windows/

post the output here if you want me to review