dns

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 York Times, and The Huffington Post.…

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 publisher sites and 120+ social media channels.”…

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 from dedicated servers that may service many thous…

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 day.  Cosmic radiation, operating a device outsi…

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; in a previous outage, domain name servers were r…

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 Solutions’ hosted domain names and has more…

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 Name Service (DNS), but it can be adapted for other…

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 something about it. Even U.S. President Barack Obama fill…

Around 12:00 GMT March 16, 2013, a distributed denial of service (DDoS) attack took offline both the spamhaus.org website and a portion of its e-mail services. SpamHaus was able to restore connectivity by March 18; however, SpamHaus is still weathering a massive, ongoing DDoS attack. The DDoS attack…