fronter can be used to test a list of domain names against your CDN endpoint to validate if they are frontable.

Censys.io is nice way to find possible frontable domains, especially if you use their API.

Usage

1. Create a list of domain names

$ cat domains.txt 
www.suzuki.kanagawa.jp
cdn-atfujita-verizon.azure.aaq.jp
cdn.ambitenergy.jp
cdn.msjpdsi.com
cdn2.msjpdsi.com
images.suzuki.kanagawa.jp
jp.amari.com
jp.aorus.com
jp.mosaic-collection.com
jp.shama.com
jp.trip-fever.com
support.kinq.jp
td-cdn.aaq.jp
tile.cdn.mierune.co.jp

2. Run fronter

$ python3 fronter.py -d rip-derbycon.azureedge.net -f domains.txt
[+] CDN Endpoint: rip-derbycon.azureedge.net

[+] Testing: www.suzuki.kanagawa.jp
[+] Testing: cdn-atfujita-verizon.azure.aaq.jp
[+] Testing: cdn.ambitenergy.jp
[!] Testing: cdn.msjpdsi.com
[+] Testing: cdn2.msjpdsi.com
[!] Testing: images.suzuki.kanagawa.jp
[+] Testing: jp.amari.com
[+] Testing: jp.aorus.com
[+] Testing: jp.mosaic-collection.com
[+] Testing: jp.shama.com
[+] Testing: jp.trip-fever.com
[!] Testing: support.kinq.jp
[+] Testing: td-cdn.aaq.jp
[+] Testing: tile.cdn.mierune.co.jp

[+] Done!
Login to VPS and find your frontable domains
cat /var/log/apache2/access.log | grep python-requests | awk -F"canary-" {'print $2'} | cut -d " " -f 1 | sort -u

3. Login to your VPS to see what domains are frontable

$ cat /var/log/apache2/access.log | grep python-requests | awk -F"canary-" {'print $2'} | cut -d " " -f 1 | sort -u

cdn2.msjpdsi.com
cdn.ambitenergy.jp
cdn-atfujita-verizon.azure.aaq.jp
jp.amari.com
jp.aorus.com
jp.mosaic-collection.com
jp.trip-fever.com
td-cdn.aaq.jp
tile.cdn.mierune.co.jp
www.suzuki.kanagawa.jp