In the ever-changing world of threats, spammers have once again discovered a new way to bypass spam filters using a new technique called “image spam.” In this tip, Mike Chapple provides an example of image spam and explains how the threat can hurt your organization, and what you can do to protect against these attacks.

DNS amplification attacks can generate enough bogus traffic to blow almost anyone off the Internet. Learn how these packet flood attacks work and how to defend your organization.

Instant messaging can be a conduit through which viruses come in to and sensitive data goes out of the corporate network. Enterprises need a thorough IM policy and the technical measures to back it up, regardless of whether IM is allowed or strictly prohibited. This tip outlines the factors you should consider when writing an IM policy and the technical measures for enforcing it.