Tool 04 / port 443 only
What certificate does this host present?
Connects to port 443, keeps only a certificate the system trusts, and reports the issuer, the names covered and the expiry date.
How to read the result
- A short lifetime with an automatic renewal is healthier than a long manual one.
- Every hostname you serve should appear in the subject alternative names.
- The issuer tells you which authority your chain depends on.