Does DNS Tunneling works if I´am using our internal company proxies and these proxies ask external Internet proxies?
if yes , how can I avoid DNS Tunneling and other Tunneling attacks via Intrushield ?
Which Intrushield Signature recognized Tunneling ?
It should be easy enough to detect if not already. Which DNS tunneling tool are you using? You can check if a signature for it already exists or one can easily be written since the data encapsulated in the DNS packet is typically in clear text.