Commenting the line
``` tcp_connection_match=1 # match also local port ```
"solves" the issue in the fist place. tcp_reuse_port = 1 makes no difference: the outgoing INVITE is sent from the local port 443 within the existing TCP sesssion (which is necessary for NAT/FW traversal).
Shouldn't "wss" match the "tls" socket though?
I can live with that change since outgoing connections are never created on this system (WebRTC Gateway) and the existing connection is used anyway.
Pls comment or close!
Thanks for the hint!