This little tool lets you check / create a CAA Record for one domain or check several domains if a record exists. It creates records for following DNS:

• Generic - For Google Cloud DNS, Route 53, DNSimple, and other hosted DNS services
• Standard Zone File - For BIND ≥9.9.6, PowerDNS ≥4.0.0, NSD ≥4.0.1, Knot DNS ≥2.2.0
• Legacy Zone File (RFC 3597 Syntax) - For BIND <9.9.6, NSD <4.0.1, Windows Server 2016
• dnsmasq

Clone the repo with

git clone https://github.com/joelgun-xyz/caac.git

This tool runs on Python3.

You need to install a couple of libs from the requirements.txt

PyYAML==5.1.2
dnspython==1.16.0
tqdm==4.31.1
Click==7.0
click-plugins==1.0.4
requests==2.22.0

Change in the cloned project directory and run following command to install them all:

pip3 install -r requirements.txt

You can check for / create a CAA record with:

python3 caac.py -d example.com

You can check several domains for CAA records with:

python3 caac.py -bd example.com,example2.com,example.com

Sample CAA check output:

[ +++ ] Found an entry for "raiffi.ch"!

raiffi.ch. 0 iodef "mailto:[email protected]" 
raiffi.ch. 0 issue "amazon.com" 
raiffi.ch. 0 issue "digicert.com" 
raiffi.ch. 0 issue "quovadisglobal.com" 

If there is no:

python3 caac.py -d vqb.ch

[ +++ ] There was no CAA Record!

Do you want to create one? [y/N]: 

• joelgun - Initial work - up(https://twitter.com/joelgun

This project is licensed under the Apache License - see the LICENSE.md file for details

• CAA helper from SSLMate