Hello, Does anyone have a pointer on adding additional authentication filters to ISA server? Looking at the MSDN site it indicates that the APIs are quite similar. We have a University wide kerberos system that has a client for IIS and I was wondering if I could install it directly on ISA. Bill William Holmes (MCP) Department of Computer Science 310 Upson Hall Cornell University Ithaca, NY 14853 wtholmes@xxxxxxxxxxxxxx 607 255-1757 (o) 607 227-6049 (c)