Google DNS Public

[Guest]

[ramonrocha]

Dear ,

How do I do to block Google DNS plublic?
8.8.8.8
8.8.4.4
4.4.4.4

some users are changing the dns to google and bypass HTTP proxy transparent.

[dda]

You need to fix your windows security first of all.  Then block 80 and 443 in the firewall to force them through the proxy.

[ramonrocha]

Please, send more information about firewall rules to block 80 and 443 ports.

[dda]

Ordinary users should not be able to change DNS.  They are set as local Administrators and should not be.  In the firewall section go to outgoing firewall and take the ticks off ports 80 and 443.  Make sure Endian is the default gateway.

[dda]

...and put the proxy settings into internet explorer proxy settings.

[kieronrob]

You can also create outgoing firewall rules that block 8.8.8.8 and 8.8.4.4 thus preventing the users from using the google DNS servers.

[mmiat]

block ANY dns request, port 53 tcp/udp, so they can use only internal dns