Ok, I trying to build a high performance reverse proxy for serving out images and reducing the load from my webservers (which are Win2k). I've tried squid, and apache on freebsd and linux, and just for fun I tried IIS 5 on win2k just serving the images (no proxy). I used http_load and Apache bench (/usr/sbin/ab) for testing. Apache on linux with mod_proxy kicks the crap out of anything else. I was able to serve 2370 requests/sec on a dual PIII 550. Squid under linux came in second around 550 requests/sec, and we won't even talk about the BSD tests... :) However, when trying to benchmark the Win2k box, I've noticed this with NT 4.0 also, the web server will serve data for a couple of seconds, then nothing, then it will burst again. However, during the times when it's not serving data to my benchmarking clients, it will serve data just fine to another box. Does windows have some sort of Anti-DOS built into it? Maybe an embryonic connection limit? Strange. Jay