Checking refusal of a network connection

Markus Elfring Markus.Elfring at
Fri May 31 13:39:59 EDT 2019

> 	Well, providing minimal code samples that produce the problem would be a start.

I prefer an other approach to clarify relevant software configuration differences.

> 	Otherwise we are just guessing...

I can offer other data before.

> Maybe you have a firewall problem.

I hope not.

I can try another server variant out as expected.

elfring at Sonne:~/Projekte/Python> /usr/bin/python3 &
[1] 14067
elfring at Sonne:~/Projekte/Python> /usr/bin/ss -t -l -p -H|grep python
LISTEN    0          5    *     users:(("python3",pid=14067,fd=3))
elfring at Sonne:~/Projekte/Python> /usr/bin/python3 --server_id localhost --server_port 1234
Using Python version:
3.7.2 (default, Dec 30 2018, 16:18:15) [GCC]
elfring at Sonne:~/Projekte/Python> Result:

Can connections work also with a network service address like “[::1]:35529”
(which would be used by the C++ server implementation so far)?
How does the software situation look like for the support of the IPv6 loopback address?


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