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lookup record under mac

nslookup google.com
dscacheutil -q host -a name google.com

Clear mac(big sur) dns cache

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

clear ios dns cache

enter airplane mode for 15 seconds

clear chrome dns cache

chrome://net-internals/#dns

clear safari dns cache (doesn’t work for me…)

developer menu -> Empty cache 

Loading custom DNS on Mac Safari

遇到很诡异的问题，同样的 local domain 在 chrome 打得开，safari 打不开。弄了很久后，测试打开 DNSSEC 后 safari 就能用了

Router:

• Forward local domain queries to upstream DNS
• Enable DNSSEC support

Local DNS Server:

• Enable DNSSEC