I have an application that uploads a file through http from outside the firewall to a webserver internally. It keeps dropping my connection around 15-20 min in to the transfer giving a '10053 - Connection aborted' from the ISA server. I've increased the connection timeout in IIS on the webserver and on the outgoing and incoming web requests on the ISA server config. I've also tried the installing the firewall client to the webserver but to no avail. The application works fine internally since it's quicker on the LAN and doesn't have to go through the firewall. Any input would be greatly appreciated John