Command certcheck verifies remote certificate chains for some common problems like expiration dates or domain name mismatch.
Usage of certcheck:
-addr string
host:port to connect to (defaults to domain:443)
-domain string
use this domain name during TLS handshake
-exp duration
warn if certificate will expire in this period of time (default 720h0m0s)
-file string
read domain+addr pairs from this CSV file