Windows Server SP2 Causing Networking Problems on SBS Servers
The Microsoft SBS Blog released a post last week with some excellent information about a known problem with networking that occurs after the installation of SP2 onto Small Business Server. A series of resolutions is also posted.
Some of the network problems being seen involve:
Unable to VPN to the Server ("Error 800: Unable to establish connection").
Unable to RDP to SBS server
Unable to connect to shares on SBS server from the LAN
Unable to join a client machine to the domain
Unable to connect to Exchange from Outlook
Unable to connect to SSL sites either on the SBS server or on the Internet (including CompanyWeb)
Slow network performance
Outgoing FTP connections fail
DHCP Server service crashes
Slow domain logins
Intermittent connection failures from NAT clients behind the server
Intermittent RPC communications failures
If you are experiencing any of these problems...
...check out the blog post at: http://blogs.technet.com/sbs/archive/2007/04/24/common-networking-issues-after-applying-windows-server-2003-sp2-on-sbs.aspx