Domain-name registrar Joker.com acknowledged this weekend that distributed denial-of-service attacks had caused numerous problems for customers that use its domain-name service (DNS) servers to advertise the Internet addresses of their domains.
"Joker.com currently experiences massive distributed denial of service attacks against nameservers," the company said in a statement posted to its Web site. "This affects DNS resolution of Joker.com itself, and also domains which make use of Joker.com nameservers."
Customers complained late last week that the unavailability of Joker.com's DNS servers had caused their sites to be unaccessible as well. The domain-name registrar maintains the names database for about 550,000 domains, according to network security firm Netcraft.
Attacks using the domain-name system (DNS)--a normally invisible system for looking up the Internet addresses associated with Web-site and server names--have becoming increasingly popular. Last year, attackers used local domain hijacking to send Web browsers to fraudulent sites and attempt to scam the users. This month, Internet services provider VeriSign and the U.S. Computer Emergency Readiness Team (US-CERT) warned (pdf) that denial-of-service attacks using recursive DNS queries are gaining in popularity.
Posted by: Robert Lemos