Running two SMMP Server on the same Computer

[jesripurba]

Due to different user requirements, I tried to run 2 SMPP servers on the same computer, with different ports. Both SMPP Servers can connect properly. The user can connect to the first SMPP server successfully. However, when the user tries to connect to the second SMPP server, the following error occurs:
#################
06:13:21.960: Info (SmppClientDemo) Connecting to xxxxxx
06:13:41.973: Error (SmppClient1.Socket) Connection failed. Unexpected error., Exception: System.TimeoutException: The operation has timed out.
at †††
†††††‡.†††
†††‡”‹.<TimeoutAfter>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
at †††
†††††‡.†††
†††‡Ž.<ConnectAsyncInternal>d__61.MoveNext()
#################

Please guide, how can this happen. Are there any license restrictions?

Regards,
Jesri

[alt]

No, it is not the license restriction.

I think it is a firewall problem on the machine.