Category Archives: SSL

The consequence of not renewing ATA certificate in time

Posted on 13 January, 2020 by Tom Aafloen

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 , | 2 Comments

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

Posted on 4 December, 2017 by Tom Aafloen

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?

Posted on 29 March, 2016 by Tom Aafloen

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