Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: DNS Test - Internet Security | DShield DNS Test

Sign Up for Free!   Forgot Password?
Log In or Sign Up for Free!

This page will test a DNS server to make sure that it does not respond to the standard NS requests for the root zone. It will run "dig . NS @yournameserver".

To prevent abuse of this page. You are limited to 10 queries, after which you have to wait an hour for any additional queries. We also setup a very simple "math captcha".

What is the result of the math problem shown in the image above?
Enter the IP address or host name of your DNS Server: