Hi All, Any idea how to resolve this issue. As the ISA server is hanging continously without any response. ISA is in integrated mode. Pls. advice. Vinay. ISA Server name: XXXXXXXXXXX ISA Server detected a spoof attack from Internet Protocol (IP) address 127.0.0.1. A spoof attack occurs when an IP address that is not reachable via the interface on which the packet was received. If logging for dropped packets is set, you can view details in the packet filter log.