block dns request except from opendns

[n0ticer]

wingate server under DNS resolver, DSL modem & LAN card are all set/bind to use wingate default dns & opendns.

seems everything works great, it blocks & allows what has been configured. but if i change dns settings in workstation using any public dns, wingate can no longer recognize the restricitions, in other words it gets bypass.

is there a way i could set wingate NOT to let workstations access or utilize other dns service aside from what i want to allow like opnedns? or to let all dns query pass thru wingate using opendns.

any idea guys. thanks

[n0ticer]

this has somehow block dns request from public dns

under Extended Networking > Port Security > LAN connection to Internet / Wingate PC <udp & tcp selected>
set port range 53-53, Redirect Packet to 192.168.0.1 <wingate> override port 53

seems working well, but if the public dns service port uses other than 53, thats another problem.

[adrien]

I don't think there are any DNS servers that use anything other than port 53, and I don't know if you can change a client to use a different port either (possibly by editing services file)

So you should be pretty safe with this one.

Adrien