Hy everyone,
after the Nagios core update from 4.4.3 to 4.4.4 I realized, that everytime (once a day) the check_ssl_cert Check is being
executed on my hosts with the result "SSL_CERT CRITICAL <FQDN_HOSTNAME>: No certificate returned".
The check_ssl_cert Version is 1.88.0
Even if I execute the command manually on the Nagios Server, with the parameter "-H" for hostname.
Forward and backward DNS lookups are identical, so thats OK.
After some undetermined time, the Check suddenly works on the CLI on the Nagios Server.
Thanks in advance.