Adobe Flash Media Server (FMS) 3.5 has an optional integrated HTTP server. It allows a single hosted solution for all interactive and streaming applications with progressive delivery when needed. If you have your own web server (either locally or remotely hosted), then you can opt not to install the integrated HTTP server. In these cases, you can configure FMS 3.5 to send HTTP requests to external web servers using HTTP proxying.
HTTP proxying is enabled by default and is configured to local port 8134. FMS normally listens for RTMPT connections on port 80--the default port for HTTP connections. If an RTMPT request is blocked (for example, by firewall rules) or FMS receives an unknown request via the tunneling port, FMS forwards the request across the configured proxy port. This TechNote describes how to manage HTTP proxying.
HTTP proxying is configured in the HTTPTunnel section of the Adaptor.xml file (found in fms_root/conf/_defaultRoot). It requires that you enable HTTP tunneling.