# DNSCrypt DNS stamp
echo | openssl s_client -connect '<IP_ADDRESS>:<PORT>' -servername <SERVER_NAME> 2>/dev/null | openssl x509 -outform der | openssl asn1parse -inform der -strparse 4 -noout -out - | openssl dgst -sha256

# Stubby base64 digest
echo | openssl s_client -connect '<IP_ADDRESS>:<PORT>' -servername <SERVER_NAME> 2>/dev/null | openssl x509 -pubkey -noout | openssl pkey -pubin -outform der | openssl dgst -sha256 -binary | openssl enc -base64

# AliDNS
https://123321.alidns.com/dns-query
https://123456.alidns.com/dns-query
https://123123.alidns.com/dns-query