After delivering several presentations at Cisco Live and Cisco Connect this year, I received a few questions regarding DNS Response Policy Zones (RPZ) and how can they be used to block DNS resolution to known malicious hosts and sites. I decided to
The Syrian Electronic Army continues to hammer away at media organizations. This afternoon the Syrian Electronic Army appears to have compromised the registrar Melbourne IT which hosts the domains of notable media organizations like Twitter, The New
ShareThis provides a mechanism for web surfers to share content online through a customizable widget. According to the information on their website, ShareThis interacts with “more than 94% of U.S. Internet users across more than 2 million
DNS records are an attractive target for distributors of malware. By compromising the DNS servers for legitimate domains, attackers are able to redirect visitors to trusted domains to malicious servers under attacker control. DNS requests are served
A memory error is a condition that occurs any time one or more bits being read from memory have changed state from what was previously written. By even the most conservative of estimates Internet devices experience more than 600,000 memory errors per
Network Solutions is a domain name registrar that manages over 6.6 million domains. As of July 16, 2013, the Network Solutions website is under a Distributed Denial of Service (DDoS) attack. Recently, Network Solutions has been a target for attackers
UPDATE: This blog post is related to the redirection of domain name servers that occurred back in June 2013. This post is NOT related to the ongoing activity occuring July 16, 2013. Cisco TRAC is currently analyzing the ongoing issues with Network
This introductory post explains how one of Cisco’s security research groups established a network data collection capability for large amounts of network traffic. This capability was necessary to support research into selected aspects of the Domain
Are you excited about March Madness? Turn on a TV and it will be hard to avoid the games, the news, the commentaries, and the jokes about it. If you eavesdrop in any restaurant, bar, or office conversation, I can assure you that you will hear
