Summary
The PowerDNS Nameserver is running at this host.
The PowerDNS Nameserver allow remote users to query for version and type information. The query of the CHAOS TXT record 'version.bind', or 'version.pdns' will typically prompt the server to send the information back to the querying source.
Solution
Set 'version-string' in pdns.conf or recursor.conf.
References
Updated on 2015-03-25