* Botnet Command and Control Servers
etc.
-This is because well-behaved domains tend to return fairly stable results to DNS record lookups, and thus domains which don't exhibit this behaviour may be suspsicious or may indicate a domain under attack.
+This is because well-behaved domains tend to return fairly stable results to DNS record lookups, and thus domains which don't exhibit this behaviour may be suspicious or may indicate a domain under attack.
UDR is disabled by default - to enable it, set ``unique-response-tracking=yes`` in recursor.conf.