shell:$ nslookup -timeout=2 -retry=1 'a.sg.servergo.pw'
;; Got SERVFAIL reply from 1.1.1.1, trying next server
;; Got SERVFAIL reply from 8.8.8.8
Server:		8.8.8.8
Address:	8.8.8.8#53

** server can't find a.sg.servergo.pw: SERVFAIL