Topic: Win2003 SP1 and MS05-019 Connectivity Issues - Hotfix Available
Win2003 SP1, or Win2000/XP/2003 + MS05-019 clients encounter connectivity issues in various scenarios. This is caused by the host ignoring ICMP Destination Unreachanble - Next Hop messages from intermediate devices.
A hotfix is now available for this.
Link : Network connectivity between clients and servers may not work after the installation of security update MS05-019 or Windows Server 2003 Service Pack 1
http://support.microsoft.com/kb/898060
Network connectivity between clients and servers may fail. This failure occurs after the installation of either security update MS05-019 or Microsoft Windows Server 2003 Service Pack 1 (SP1). Any one or more of the following symptoms may occur:
- Inability to connect to terminal servers or to file share access
- Failure of domain controller replication across WAN links
- Microsoft Exchange servers cannot connect to domain controllers
Thanks to Clint Denham for the heads-up on this issue!

