The message "Address already in use" indicates the core problem. Something
*else* is already attached to port 6661. Either another instance of stunnel, or
some system service.
-- Mike
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Hi, I am new to stunnel on a MAC. When I run stunnel with the enabled
configuration [mllp-to-dip], I am prompted for a local password and then for my
certificate passphrase. I am not able to establish a tunnel. See logs:
Initializing service [mllp-to-dip]
[ ] stunnel default security level
Hiya,
Thank you for your message.
I can confirm in your logs says that port number already exists and is
being used.
Therefore either find out what service using that port in question or
change the port restart your stunnel
Systemctl restart stunnel4
Then to check systemctl status stunnel4
