Esta mañana, al ver las gráficas de conexiones entrantes, mensajes rechazados…etc en nuestros relays de entrada, he notado un bajón importante en cuanto a spam recibido. La gráfica siguiente lo muestra claramente, cómo a partir de última hora de ayer empiezan a bajar los rechazos por listas negras (línea negra, rosa y verde):

Leyendo la lista de SpamAssassin, hacían referencia al siguiente artículo del WashingtonPost, que comenta cómo varios ISPs que daban conectividad a la empresa de hosting «McColo Corp.» han procedido a «cortarles» el servicio y por tanto, han hecho desaparecer a este ISP de Internet. Esta empresa se dedicaba al envío de spam desde sus servidores, alojamiento de pornografía infantil, fraude…etc; Security Fix se puso en contacto con los ISPs de ésta, comunicándoles a qué se dedicaban con informes creados por otras empresas de seguridad y parece que ha surgido efecto :-)

Posted at 07:06 PM ET, 11/11/2008
Major Source of Online Scams and Spams Knocked Offline

A U.S. based Web hosting firm that security experts say was responsible for facilitating more than 75 percent of the junk e-mail blasted out each day globally has been knocked offline following reports from Security Fix on evidence gathered about criminal activity emanating from the network.

For the past four months, Security Fix has been gathering data from the security industry about McColo Corp., a San Jose, Calif., based Web hosting service whose client list experts say includes some of the most disreputable cyber-criminal gangs in business today.

On Monday, Security Fix contacted the Internet providers that manage more than 90 percent of the company’s connection to the larger Internet, sending them information about badness at McColo as documented by the security industry.

…

Two hours later, I heard from Benny Ng, director of marketing for Hurricane Electric, the Freemont, Calif., company that was the other major Internet provider for McColo.

Hurricane Electric took a much stronger public stance: «We shut them down,» Ng said.

The badness attributed to McColo was not limited to spam. It included child pornography sites; sites that accepted payment for spam and child porn; rogue anti-virus Web sites; and a huge malicious software operation that apparently stole banking and credit card data from more than a half million people worldwide.

Otra buena noticia, junto a la de EstDomains que ya comentábamos el otro día :-)