A Simple Curiosity

I have never seen HTTPS on an IP address before, and on further inspection I noticed that the https://1.1.1.1 / https://1.0.0.1 / https://cloudflare-dns.com all share the same certificate. How was this accomplished? I am very intrigued!

It’s called Subject Alternative Names (SAN)

https://www.digicert.com/subject-alternative-name.htm

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That is very cool! I didn’t know you could do that with IP addresses!

Thank you for the (VERY) fast reply :slight_smile:

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