Checking refusal of a network connection

[Markus Elfring]

> It looks like the service isn't listening at the time the so.connect is called.

* I get an other impression from the programs “/usr/bin/netstat” and “/usr/bin/ss”.

* The data transmission seems to work also for my small script “socket-send_test_data1.tcl”
  (even when the identification “::1” was passed as a command parameter).

Regards,
Markus