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====== Check SSL Cert Expire Date ======

===== Expire Date =====
<code>
echo | openssl s_client -showcerts -servername <sniname> -connect <server>:<port> 2>/dev/null | openssl x509 -noout -startdate -enddate

Beispiel:
echo | openssl s_client -showcerts -servername dwiki.heisl.org -connect dwiki.heisl.org:443 2>/dev/null | openssl x509 -noout -startdate -enddate
</code>
\\

===== Subject =====
<code>
echo | openssl s_client -showcerts -servername <sniname> -connect <server>:<port> 2>/dev/null | openssl x509 -noout -subject

Beispiel:
echo | openssl s_client -showcerts -servername dwiki.heisl.org -connect dwiki.heisl.org:443 2>/dev/null | openssl x509 -noout -subject
</code>

\\

===== Text =====
<code>
echo | openssl s_client -showcerts -servername <sniname> -connect <server>:<port> 2>/dev/null | openssl x509 -noout -text

Beispiel:
echo | openssl s_client -showcerts -servername dwiki.heisl.org -connect dwiki.heisl.org:443 2>/dev/null | openssl x509 -noout -text
</code>
\\

===== Text local =====
Cert Text local abfragen inkl. der Cert Chain
<code>
openssl crl2pkcs7 -nocrl -certfile <CERT> | openssl pkcs7 -print_certs -text -noout
</code>