Last night we applied serveral Microsoft patches. After the reboot the server is no longer accessible from the network, even though the network status in "Network Connections" shows "Connected."
I have also confirmed that the switch has a link light to the server. I have swapped cables, updated the NIC drivers, and I have uninstalled all Microsoft updates. The server is still not able to access anything on the network.
I have even gone so far as setting the IP address to a private IP address with no gateway, and connected my laptop to the server with a cross-over cable with another private IP. The two system can not ping each other.
As a last ditch effort I have installed another NIC. The behavior is the same - Windows and the switch all have link status, but the results are the same. The server can not access anything on the network.
I am at my wits end with this server. Does anyone have any suggestions on what I can do to get this system back to working?
Server is running Windows 2003 64-bit.
EDIT -- I have found the following in the event log:
“Event ID: 4292 – The IPSec driver has entered Block mode. IPSec will discard all inbound and outbound TCP/IP network traffic that is not permitted by boot-time IPSec Policy exemptions”.
However I cannot figure out how to get the IPSec Service started -- it times out when I try to mannually start the service (it is set to auto start up but it is failing).