WCF Service EndPoint Address

Question

Hi,
Can anyone please expalin this to me, it just seems strange and i'm having issues with an application.

1. My endpoint service conenction is: http://RRAPP01PROD:8101/DynamicsAx/Services/RRSalesOrderAIF
2. The WCF Service generates correctly in Visual Studio to the above address and produces the Service Reference file
3. If I open the Reference file and scroll to the bottom the GetEndPointAddress is returning an EndPointAddress of net.tcp://rrapp01prod:8201/DynamicsAx/Services/RRSalesOrderAIF
4. If I open Postman and enter the endpoint address of http://RRAPP01PROD:8101/DynamicsAx/Services/RRSalesOrderAIF it connects and returns info abount the connection in XML format, if I browse the information I noted that soap12:address is "net.tcp://rrapp01prod:8201/DynamicsAx/Services/RRSalesOrderAIF"

My question is why is the address port numbers different?? (8101 vs 8201)

Regards
Peter

Answer 1

Hi @Peter Annandale ,
Because WCF net.tcp and HTTP cannot use the same port.

The TCP/IP protocol uses a 16-bit number, called a port, to differentiate connections to multiple network applications running on the same machine. If an application is listening on a port, then all TCP traffic for that port goes to that application. Other applications cannot listen on that port at the same time.

Many protocols have a standard or default port number that they use. For example, the HTTP protocol typically uses TCP port 80.

https://learn.microsoft.com/en-us/dotnet/framework/wcf/samples/net-tcp-port-sharing-sample
Best regards,
Lan Huang

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