mirror of https://github.com/CrimsonTome/tldr.git
17 lines
558 B
Markdown
17 lines
558 B
Markdown
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# openssl s_client
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> OpenSSL command to create TLS client connections.
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> More information: <https://www.openssl.org/docs/manmaster/man1/openssl-s_client.html>.
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- Display the start and expiry dates for a domain's certificate:
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`openssl s_client -connect {{host}}:{{port}} 2>/dev/null | openssl x509 -noout -dates`
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- Display the certificate presented by an SSL/TLS server:
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`openssl s_client -connect {{host}}:{{port}} </dev/null`
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- Display the complete certificate chain of an HTTPS server:
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`openssl s_client -connect {{host}}:443 -showcerts </dev/null`
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