Speaker
Duane Wessels
(Verisign)
Description
Recent attacks bring renewed attention to the millions of open resolvers on the Internet. Discovery of open resolvers has traditionally been done by wide-scale surveys of known name servers or address space. Such surveys suffer from a few problems: (1) probing traffic may be seen as abusive; (2) the desire to provide open resolver addresses to the "good guys" but keep them away from the "bad guys"; and (3) big surveys take a long time and are updated on the surveyor's schedule.
Verisign has developed a new tool that allows network administrators to scan their own address space for open resolvers at their own convenience and quickly view the results.
Primary author
Duane Wessels
(Verisign)
