sshd443_server.conf

foreground = yes
client = no

pid =
syslog = no

ciphers = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384

[sshd443]
# if you're not worried about running stunnel as root, change this to:
# accept 443
accept = /tmp/sshd443.sock
connect = 127.0.0.1:22
cert = /etc/stunnel_certificates/fullchain.pem
key = /etc/stunnel_certificates/privkey.pem