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Blocking DNS Changes

Posted: Thu Jan 29, 2015 6:22 am
by pmerrill
I am in need of blocking certain machines on the network from changing their DNS but others can. I've created the following rule that I think says, block all DNS traffic execpt for DNS traffic to the opendns servers. Have I constructed it right?
Rule.jpg
Rule.jpg (53.2 KiB) Viewed 2070 times

Re: Blocking DNS Changes

Posted: Thu Jan 29, 2015 1:58 pm
by ispyisail
does it work?