A graph based on the data downloaded from CAIDA AS Relationships at 1st of July 2015.
Sometimes just asking politely makes your day.
A few moments later, he had created the alias firstname.lastname@example.org. He decided to give the address a test run by trying to get a trusted certificate.
To his surprise, Comodo issued the certificate, no questions asked.
The Certification Authority Authorization (CAA) DNS Resource Record allows a DNS domain name holder to specify one or more Certification Authorities (CAs) authorized to issue certificates for that domain.
How to check a domain’s CAA record which is identified by a type257 DNS record:
$ dig +short -t TYPE257 google.com
\# 19 0005697373756573796D616E7465632E636F6D
For more information:
IPv6 Services Monitoring Tool (IPV6-SMT) update: Code now follows the HTTP redirect location if web server returns an HTTP redirect header.