{"action":"opened","issue":{"url":"https://api.github.com/repos/bagder/curl/issues/390","labels_url":"https://api.github.com/repos/bagder/curl/issues/390/labels{/name}","comments_url":"https://api.github.com/repos/bagder/curl/issues/390/comments","events_url":"https://api.github.com/repos/bagder/curl/issues/390/events","html_url":"https://github.com/bagder/curl/issues/390","id":101768197,"number":390,"title":"TLSv1.2 error?","user":{"login":"lmarkus","id":736932,"avatar_url":"https://avatars.githubusercontent.com/u/736932?v=3","gravatar_id":"","url":"https://api.github.com/users/lmarkus","html_url":"https://github.com/lmarkus","followers_url":"https://api.github.com/users/lmarkus/followers","following_url":"https://api.github.com/users/lmarkus/following{/other_user}","gists_url":"https://api.github.com/users/lmarkus/gists{/gist_id}","starred_url":"https://api.github.com/users/lmarkus/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lmarkus/subscriptions","organizations_url":"https://api.github.com/users/lmarkus/orgs","repos_url":"https://api.github.com/users/lmarkus/repos","events_url":"https://api.github.com/users/lmarkus/events{/privacy}","received_events_url":"https://api.github.com/users/lmarkus/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-18T22:56:35Z","updated_at":"2015-08-18T22:56:35Z","closed_at":null,"body":"I've been banging my head against this for the past few days:\r\nI can connect against the following URL from my laptop, but not from my dev box.\r\nI just rebuilt openSSL and curl form scratch to make sure I'm on the latests version.\r\n\r\nI'm successfully able to manually establish a connection via `openssl s_client -connect <url>`\r\nAny pointers on what I could check here?\r\nThanks!\r\n\r\n\r\n```bash\r\n$ curl -vvv \"https://ms136.slack-msgs.com\"\r\n* Rebuilt URL to: https://ms136.slack-msgs.com/\r\n*   Trying 54.175.159.82...\r\n* Connected to ms136.slack-msgs.com (54.175.159.82) port 443 (#0)\r\n* ALPN, offering http/1.1\r\n* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH\r\n* successfully set certificate verify locations:\r\n*   CAfile: /etc/ssl/certs/ca-certificates.crt\r\n  CApath: none\r\n* TLSv1.2 (OUT), TLS header, Certificate Status (22):\r\n* TLSv1.2 (OUT), TLS handshake, Client hello (1):\r\n* Unknown SSL protocol error in connection to ms136.slack-msgs.com:443 \r\n* Closing connection 0\r\ncurl: (35) Unknown SSL protocol error in connection to ms136.slack-msgs.com:443 \r\n```\r\n\r\n```bash\r\n$ curl --version\r\ncurl 7.44.0 (x86_64-unknown-linux-gnu) libcurl/7.44.0 OpenSSL/1.0.2d zlib/1.2.8\r\nProtocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp \r\nFeatures: IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP UnixSockets \r\n```"}}