HAProxy not passing SSL traffic in TCP mode (unknown protocol)
I've solved it!
You must have 'mode tcp' in both the frontend and backend ugh
frontend https-c-in
bind 178.79.xxx.xxx:443
mode tcp
default_backend c-https
backend c-https
balance source
mode tcp
option ssl-hello-chk
server c-web-01 192.168.xxx.xxx:443 check inter 2000 rise 2 fall 5