Category Archives: SSL

The consequence of not renewing ATA certificate in time

A customer who uses Microsoft Advanced Threat Analytics (ATA) recently had severe issues with their ATA implementation. At first, the portal started to behave strangely, not showing all information in alerts and some configuration settings were missing. After a restart … Continue reading

Posted in ATA, Certificates, PKI, SSL | Tagged , | 1 Comment

Get a free publicly trusted certificate using Let’s Encrypt, PowerShell and DNS

I have previously blogged about the free publicly trusted certificate solution Let’s Encrypt, see here. In this post, I will show how you can request a certificate with a PowerShell script and prove ownership of the domain name using DNS … Continue reading

Posted in CA, Certificates, LetsEncrypt, PKI, SAN, SSL | Tagged , , , , , | Leave a comment

SSL Certificates and SAN – What domain names are valid?

An SSL certificate has a field called Subject. The Subject field contains the domain name that the certificate is valid for. Subject can only contain one domain name: The field Subject can have more information, like the screenshot below, but … Continue reading

Posted in Certificates, PKI, SAN, SSL | Tagged , , , | Leave a comment