Most people are aware that TCP port 25 is a reserved port number for the SMTP service. Unknown to many, however, is the existence of another reserved port – TCP/587 – for user submission of messages.
Proposed by RFC 2476 ( ietf.org ), the Message Submission Port is one that should be used by email clients, [...]

L.root-servers.net was recently renumbered from 198.32.64.12 to 199.7.83.42
Well, not exactly recently, it was announced by ICANN in October 2007 ( icann.org )
But hey!.. I wouldn’t bet that many people out there are aware of this.
Having renumbered the server, queries to the old address should have automatically failed. Surprisingly however, queries to the old address continued [...]

记四川汶川大地震。 让我们一起为四川祈祷，为中国祈福。
In memory of Sichuan Earthquake.

Video mirrored from youku.com for faster loading.

Exploiting Google mail servers as open SMTP relays – ( securityfocus.com )
Gmail’s normal approach to messages sent though its SMTP service is to rewrite some of the Message Body headers to prevent identity fraud. By exploiting this flaw, an attacker can easily bypass this restriction. This happens because attack messages are disguised as legitimately destined [...]

Above the access layer, most networking equipment have their architecture divided into two main components – the forwarding plane and the control plane. Understandably, the forwarding plane looks up the next-hop and forwards packets with customized hardware ASICs or highly optimized software algorithms.
The control plane however, is a different thing altogether. Charged with the responsibility [...]