Are you familiar with these DNS records: CAA, URI, LOC Are you familiar with the...

Are you familiar with these DNS records: CAA, URI, LOC

DNS   DEREK MANNING   3 COMMENTS

Are you familiar with these DNS records: CAA (Certification Authority Authorization), URI (Uniform Resource Identifier), LOC (Location).

New DNS record

1
CAA (Certification Authority Authorization)

Certification Authority Authorization (CAA) records allow a domain name holder to specify one or more Certification Authorities (CAs) authorized to issue certificates for that domain. (RFC 6844) Adding a CAA record to a domain allows you to reduce the likelihood of someone obtaining an unauthorized SSL certificate for your domain. CAA records are also inherited by subdomains which means that a CAA record set for example.com will also apply to any subdomain, such as sub.example.com unless it is overridden. Below is an example of a CAA record for a domain which authorizes certificates to be issued by Comodo.

yourdomain.com. CAA 0 issue “comodo.com”
2
URI (Uniform Resource Identifier)

A Uri Record is a DNS record used to represent raw actions. A URI consists of a prefix and its contents. The record is a means for publishing mappings from hostnames to URIs. A URI record looks like the below:

_ftp._tcp.yourdomain.com. 90 IN URI 10 1 "ftp://ftp.yourdomain.com/home"
ftp: service.
tcp: protocol which is the transport protocol of the desired service. It is usually TCP or UDP.
yourdomain.com: name. the domain name for which this record is for.
90: TTL.
10: priority which is the priority of the target host. The lower the value, the higher the priority.
1: weight which is used for records with the same priority. Higher value means more preferred.
"ftp://ftp.yourdomain.com/home": target which holds the URI of the target enclosed in double-quote.

3
LOC (Location)

A LOC record specifies geographic location information for a domain name. It contains the following information: Latitude / Longitude. Altitude. Size (diameter of the location described). Horizontal / Vertical precision of the data. A sample record of yourdomain.com for the coordinates: 64°22′23″N 38°45′32″W looks like the below:

youedomain.com. IN LOC 64 22 23.000 N 38 45 32.000 E -2.00m 0.00m 10000m 10m
We are constantly packing new features into our service. If you want other DNS records to be supported, give us a shout in the comments and we will add it for you!





Ron Salazar
June 28, 2018 AT 7:30 AM

I have been with Dynu for many years and it is so encouraging to see that you are adding more and more features. Keep up the good work!

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Anthony Cooper
June 29, 2018 AT 11:31 AM

I think CAA record is extremely useful. I myself do not use the other 2 records.

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DEREK MANNING
June 29, 2018 AT 5:16 PM

You are absolutely right Anthony! CAA record is the most used of the 3 DNS records.

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