Oct 05, 2006
To request a page from a secure (SSL) server on port 443 you can use openssl instead of telnet. Other than that the method is the same: $ openssl s_client -connect XXX.XX.XX.XXX:443 How To Use OpenSSL s_client To Check and Verify SSL/TLS Of OpenSSL provides different features and tools for SSL/TLS related operations. s_lient is a tool used to connect, check, list HTTPS, TLS/SSL related information.Simply we can check remote TLS/SSL connection with s_client .In this tutorials we will look different use cases of s_client .. … OpenSSL OpenSSL is a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library. For more information about the team and community around the project, or to start making your own contributions, start with the community page.
If you have only imaps enabled, see "remote login" section below for how to test using openssl s_client. Check that it's allowing logins # telnet localhost 143 a login "username" "password" Replace the username and password with the ones you added to passwd.dovecot in BasicConfiguration. Note that all IMAP commands begin with a tag, which is
To run openssl, open a command prompt window, use the cd command to change to the folder where you extracted the files in step 5, and then type openssl. Using the openssl program to troubleshoot. To troubleshoot a secure connection using the openssl program, you must know at least two things: The remote server name or IP address.
telnet - Openssl command s_client always says 400 Bad
Engines []. Some third parties provide OpenSSL compatible engines. As for the binaries above the following disclaimer applies: Important Disclaimer: The listing of these third party products does not imply any endorsement by the OpenSSL project, and these organizations are not affiliated in any way with OpenSSL other than by the reference to their independent web sites here. Access IMAP server from the command line using OpenSSL | A May 10, 2011 How to Test SMTP Server from the Command Line via Telnet