https://kb.isc.org/article/AA-00778
Check you BIND version:
[CMD=""]named -v[/CMD]
Check your DNS provider:
[CMD=""]nslookup -q=txt -class=CHAOS version.bind[/CMD]
Check you BIND version:
[CMD=""]named -v[/CMD]
Check your DNS provider:
[CMD=""]nslookup -q=txt -class=CHAOS version.bind[/CMD]