I have an Apache2.0.55 server under Ubuntu, serving multiple VHosts, with a reverse proxy that redirects a top-level directory of one of the sites to a Rails application running mongrel. The mongrel is started using --prefix=top_level_dir, and most of this Rails app works fine. One of my forms expects upload of large files (half a MB or more), and this works fine when passed to mongrel directly, but via mod_proxy, I get "connection reset" and this in error.log: Connection reset by peer: proxy: prefetch request body failed to localhost from AAA.BBB.CCC.DDD I checked the Apache source code, and there seems to be a 16384 byte buffer which it uses to try to prefetch the POST body so it can send Content-Length. After googling a bit, I tried setting some Apache2 special environment variables that promised to modify the behaviors: SetEnv downgrade-1.0 SetEnv proxy-sendcl SetEnv proxy-sendchunked I tried these one at a time... still get the error. What am I doing wrong? Clifford Heath. --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx