{ auto_https off servers :80 { protocols h1 h2c } } http://captive.apple.com:80 { respond "Success" } http://clients3.google.com:80 { respond 204 } http://connectivitycheck.gstatic.com:80 { respond 204 } http://www.msftncsi.com:80 { respond "Microsoft NCSI" } http://www.msftconnecttest.com:80 { respond "Microsoft Connect Test" } http://ipv6.msftconnecttest.com:80 { respond "Microsoft Connect Test" } http://detectportal.firefox.com:80 { respond "" } http://:80 { redir https://{host}{uri} permanent }