On the morning of  Tuesday the 22nd, we will block access to our recursive DNS servers from off of our network.  This will help reduce the use of our DNS servers as part of the ongoing DNS Amplification Attacks as well as protect their quality of service for all of our customers.  This will, however, cause issues for any roaming device that has our DNS servers hard coded.  These devices should be configured to use server assigned DNS settings instead.  For more information please see our forums.
-Kelsey and William