I have Google App Engine running in HTTP (port tcp 80), which is a daemon based service it execute back-end some python instances. Now all that works over HTTP , TCP 80, and Google App Engine itself do not have any kind of HTTPS setup, it has to be organized externally. Therefore, the biggest problem is now that how can i use stunnel to resolve this problem please? I have already tried following setup and it does not work at all. 1) if the user visit https://www.mysite.com then he hit stunnel accept=443 after that he is connected with connect=80 but user browser change into http:// instead of remaining in https:// . Which make the whole thing not working $ uname -a Linux server2 2.6.32-358.23.2.el6.x86_64 #1 SMP Wed Oct 16 18:37:12 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux $ cat /etc/stunnel/stunnel.conf pid = /stunnel.pid cert=/etc/stunnel/abyhu.crt CAfile=/etc/stunnel/abyhu.ca key=/etc/stunnel/abyhu.key sslVersion = all ;socket = l:TCP_NODELAY=1 ;socket = r:TCP_NODELAY=1 client=no debug = 7 output = /var/log/stunnel.log [SSL] accept=443 connect=80 TIMEOUTclose = 0 My goal is: when user visit https://www.mysite.com it remain as https not become http:// then it is not solving the problem cause Google app engine do not have HTTPS Thank you. Best regards