OpenSSL on Linux servers includes a command line tool for testing TLS. What is the name of the tool and the correct syntax to connect to a web server?

The correct answer is C. openssl_s_client -connect www.website.com:443. The correct tool name is 'openssl s_client' (with a space, as s_client is a subcommand of the openssl utility), and the correct flag to specify the target host and port is '-connect'. The full correct syntax is 'openssl s_client -connect www.website.com:443', where 443 is the…

Submitted by chen.hong· Mar 6, 2026Cryptography and PKI / Implementing Secure Protocols and Tools

Question

OpenSSL on Linux servers includes a command line tool for testing TLS. What is the name of the tool and the correct syntax to connect to a web server?

Options

Aopenssl s_client -site www.website.com:443
Bopenssl_s_client site www.website.com:43
Copenssl_s_client -connect www.website.com:443
Dopenssl_client -connect www.website.com:443

How the community answered

(29 responses)

A
10% (3)
C
86% (25)
D
3% (1)

Explanation

The correct tool name is 'openssl s_client' (with a space, as s_client is a subcommand of the openssl utility), and the correct flag to specify the target host and port is '-connect'. The full correct syntax is 'openssl s_client -connect www.website.com:443', where 443 is the standard HTTPS/TLS port. This command initiates a TLS handshake and displays detailed certificate and connection information.

Topics

#TLS/SSL#OpenSSL#Linux command line#Network security tools

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