We had the following issue recently which kept some of our users in India from connecting to our server. Thought I would share with everyone:
Installing security update MS05-019 or Windows Server 2003 Service Pack 1 may cause network connectivity between clients and servers to fail CAUSE This problem occurs because the code incorrectly increments the number of host routes on the computer when the code modifies the MTU size of a host route. The maximum number of host routes is controlled by the Registry Value in MaxIcmpHostRoutes. The default number of host routes is 1,000. Because of the incorrect increment, the number of host routes eventually reaches the maximum value. After the maximum value is reached, the ICMP packets are ignored.
Mary Ubach 937.498.3085 CAD Admin Copeland Corporation Page: 937.493.1538