Stopping BYOD's using a particular proxy!
we have just stopped using the RM SafetyNet Plus service for our filtering and area now using the SafetyNet Universal service instead.
However, my predecessor for some some reason made public an RM proxy address of adslcache.rmplc.co.uk which bypasses our onsite proxy server!!! Can I do anything to prevent BYOD's from getting out to the web using this adslcache . . . address as a proxy?
I was thinking that maybe doing something on our DNS server may prevent this!?!?!
Any ideas/help will be greatly appreciated.