Firewalls prevent Flash Streaming so Progressive is better?

I have been using streaming Flash video but just found out that it can’t be seen in many places because Flash streams over ports 1935, 443, and 80, which are often closed by firewall. Progressive only needs port 443 so it’s more likely that it will come through firewall. What’s your experience and opinion concerning this?

Hey Kristjan,
Progressive download is over HTTP and streaming happens over rtmp. I think that you want to stream content over rtmp using the Flash Media Server.
Also, when rtmp request comes to flash media server rtmp://Server Name/application name/instance name) the request initially goes to port 1935 if the connection is not established then rtmp has fallback mechanism where it does port scanning and searches for the next available port where rtmp communication can be done with the media server and then it looks for port 80 and then looks for port 443 if the server listens at any of them then the request is handled. But, for this failover mechanism to work the Flash Media server should be configured acordingly
1. Got to the (fms root directory)\conf folder
2. Go to file fms.ini file
3. Go to ADAPTOR.HOSTPORT = :1935,80,443 (enter the following values)
4. Restart the services
4. Then requesting client should request in the following fashion - rtmp://Server Name:443/application name/instance name. Since you want communication only port 443.
5. The request may be in this fashion rtmp://Server Name/application name/instance name. But the response time of this will be greater with respect to the request in point 4.
Also go through this thread http://forums.adobe.com/thread/647821 for the understanding of rtmp failover mechansim
Also, About port 443 it is used for SSL(RTMPS) when you specify -443 in Adaptor.hostport and to use 443 for RTMP you specify 443(without - sign) and also specify the port while making the request.
Lastly, I would like to know since port 80 is default port for serving HTTP request and most servers allow firewall exceptions to it. Is there any special reason that you are not allowing access to it.
Thanks
With Regards
Gaurang Mathur

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