DNS/server_fingerprintについて、ここに記述してください。

https://w3dt.net/tools/fpdns

# dig chaos txt version.bind @IP address


1. 9.9.9.9 など

9.9.9.9 version.bind. 86400 CH TXT "Q9-P-5.1"

209.244.0.3 (level3) version.bind. 1 CH TXT "Version: recursive-main/20717463"

2. not vul.

77.88.8.8

version.bind. 86400 CH TXT "PowerDNS Recursor 4.0.8 (built Dec 11 2017 10:39:35 by root@4351f9921268)"