shell:$ nslookup -timeout=2 -retry=1 'speedtest.cbn.net.id' ;; Got SERVFAIL reply from 1.1.1.1, trying next server Server: 8.8.8.8 Address: 8.8.8.8#53 Non-authoritative answer: Name: speedtest.cbn.net.id Address: 1.2.3.4