Has anyone had success with getting IBM's client access (5250 emulator) working with ISA? I got all the ports opened correctly and it is communicating with the AS/400 but the problem I'm having now is the AS/400 disconnects the session. I've run a sniffer trace and found that the TCP/IP window size is large with ISA running on W2K then it was with Proxy 2.0 on NT 4. Do I need to mess with the MTU or something? Thanks in advance for your assistance. --Bill