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C# WCF Callback to client behind a NAT / Firewall

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May 12, 2008 in Microsoft Products Support & Discussions

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https://extremetechsupport.com/topic/91627-c-wcf-callback-to-client-behind-a-nat-firewall/

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Posted May 12, 2008

Posted May 12, 2008

So I managed to create a service and a client, talking to each other. The service makes callbacks to client but it seems that I "have" to open up TCP port for this. Now, what if the client is behind a NAT / Firewall, I assume there is no solution for calling back to client without opening the TCP port? ...Thanks!

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