安装 Google Authenticator

sudo apt install libpam-google-authenticator

EDNS测试工具
阿里昆仑用户诊断工具
网易DNS检测工具
TXT记录

resolver.dnscrypt.info
whoami.ds.akahelp.net
o-o.myaddr.l.google.com

Debian重启网络

systemctl restart networking

or

systemctl restart NetworkManager.service