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SSL Certificate Expiration

One of my web servers makes a call to a partners server that is outside of our network.  I think their https:// certificate expired.  Normally i could check this using an internet browser but the partner does not have a web site up at the https address.  Basically we are calling a service over port 443 using https.  Is there a way to see if their ssl certificate expired?
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deklinm
Asked:
deklinm
2 Solutions
 
Steve BinkCommented:
Use openssl_x509_parse() to examine the validity dates.
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ahoffmannCommented:
or if you have openssl:
  openssl s_client -connect remote.tld:443
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