Problem: curl: (51) SSL: unable to obtain common name from peer certificate

curl in container

root@my-ci:/etc/ssl/certs# curl -k https://google.com
Hello, World!
root@my-ci:/etc/ssl/certs# curl https://google.com   
curl: (51) SSL: unable to obtain common name from peer certificate

iptables on host

-A PREROUTING -i lxcbr0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8080
-A PREROUTING -i lxcbr0 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 8443

stunnel-mitm-proxy.conf

debug = 3
foreground = yes
pid =

[server]
client = no
cert= ./server.pem
accept = 0.0.0.0:8443
connect = 127.0.0.1:8080

# Run with `stunnel stunnel-mitm-proxy.conf`

wsgi.py

#!/usr/bin/env python

def app(environ, start_response):
    """Simplest possible application object"""
    data = 'Hello, World!\n'
    status = '200 OK'
    response_headers = [
        ('Content-type','text/plain'),
        ('Content-Length', str(len(data)))
    ]
    start_response(status, response_headers)
    return iter([data])

# Run with `gunicorn wsgi:app -b 0.0.0.0:8080`