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1.6. Firewalls and Security

Some corporate firewalls and proxy servers with restrictive access rules make it impossible to establish a persistent TCP/RTMP connection to a FlashCom Server. Some corporate IT staffs may open access to remote FlashCom Servers, but others will not. When corporate web access is permitted but TCP/RTMP connections are not allowed, FlashCom provides a tunneling feature that allows Flash and FlashCom to send and receive RTMP over HTTP. When tunneling is employed, the Flash Player works with the user's browser to poll the communication server instead of establishing a direct Player-to-server TCP connection. When RTMP is tunneled, it is known as RTMPT. As of this writing, neither the Flash Player nor FlashCom directly supports SSL. However, encryption is an option when using tunneling, because browsers support SSL and an SSL proxy can be used with the server. For more information, see the article Tunneling Flash Communications Through Firewalls and Proxy Servers at:

http://www.macromedia.com/devnet/mx/flashcom/articles/firewalls_proxy.html

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