I am setting up a SSL expiration monitor on [domain name] but I am getting an error I believe is being caused by an application firewall.
Invalid SSL certificate. Authentication failed! Closing the connection… Exception message: A call to SSPI failed, see inner exception.
The message received was unexpected or badly formatted
Would you please forward this to the vendor to see if they have a means of allowlisting our networks?
Our external nats:
[ list of IP addresses]
I can dig further and exempt their IPs. I just wonder why firewalls would even come into play for such a scan.
If my Chrome/browser can reveal the validity of an SSL cert, why would an external scan run into problems?