Hopefully, you have a starting point to troublshooting flash video errors now. An example of this can be found in this Community discussion: When tunneling the traffic, Web Gateway is only able to provide basic security controls (like URL Filtering). It is possible to tunnel RTMP traffic through the Web Gateway in a transparent setup. Unfortunately, there is no way to make this work with the Web Gateway as it is not HTTP. Notice the lack of HTTP headers in the following screenshot: Similarly, if you are in a transparent environment, such as WCCP, and forward port 80 and 443 traffic to the Web Gateway this negotiation will fail as it is not valid HTTP traffic. Again, this connection does not honor browser settings so it may fail if you block users from connecting directly out on these ports. If you don’t see any traffic on port 1935, there’s a good chance that the site is first negotiating the connection directly over port 80 and or 443. The easiest way is to run Wireshark on the client while you attempt to stream the video and use the filter “tcp.port eq 1935”. How Can I Tell if the Video is Using RTMP? The Web Gateway is an HTTP proxy and will respond with a ‘400 Bad Request’ if the traffic if it does not receive valid HTTP. Since this is a proprietary protocol, and is not HTTP, you can not simply port forward this traffic over to the Web Gateway.In our experience, most servers don’t seem to be configured to allow this fallback over ports 80 or 443. It does have the ability to downgrade to RTMPT (RTMP Tunneled) which uses RTMP data encapsulated in HTTP on port 80, but will often still attempt to connect directly to the server. It will first attempt to connect on port 1935, which is most commonly blocked in a corporate environment. When streaming using RTMP, Flash Player does not honor browser proxy settings and will attempt to connect to the server directly.Why Won’t Flash Videos Play In My Environment? However, some do and this is to help you understand why RTMP may not stream in your environment. ![]() For example, youtube and many other sites don’t. Real Time Messaging Protocol is a proprietary protocol developed by Macromedia, now owned by Adobe, for streaming media over the internet using a flash player and server.
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