Linux Journal February 2019 by Linux Journal

Author:Linux Journal
Language: eng
Format: mobi, epub
Publisher: Linux Jourmal LLC
Published: 2019-01-30T06:00:00+00:00

$ openssl s_client -showcerts -connect google.com:443 </dev/null

This command connects to the remote server using TLS and dumps a large amount of information about the TLS handshake to your console. If you had not redirected standard input from /dev/null, the connection would remain open, allowing you to interact directly with the server on port 443 (you can close this connection explicitly with Ctrl-D).

Below is an (abbreviated) view of the output, which I explore through the remainder of this article:

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