So every now and then, I will notice that our OpenDNS service will not be blocking queries. I usually perform the following steps to resolve.
Login to each DNS server and
Clear DNS Cachethen wait 5 minutes.
Pull up a command prompt and type:
1 2 3 4
ping 188.8.131.52 nslookup whoami.akamai.net. netsh interface ip show dns nslookup -type=txt debug.opendns.com
Go to OpenDNS
Go to the test blocked site
www.internetbadguys.comand ensure it is blocked by provider.