Asymmetric routing is a situation where a packet traverses from a source to a destination in one path and takes a different path when it returns to the source. This is commonly seen in Layer-3 routed networks, for instance on Internet.
Capturing packets from computer networks can sometimes sound like an activity reserved for hackers and geeks. Looking at a stream of raw packets is not for the fainthearted, but thankfully there are a number of technologies out there that can make the task easier.
The Bunker, near Sandwich in Kent, is an unassuming place, as the name implies, it’s what goes on underground that is of interest. However, there are outward signs that this is a slightly unusual place: a barbed-wire topped fence surrounds the premises, on top of a green metal container sits an enormous exhaust pipe. To enter, I’m required to show my passport to security.
Last week, a technical glitch forced the Internet Corporation for Assigned Names and Numbers, which is in charge of domain names, to abruptly shut down a system for letting companies and organizations apply for new names.
Despite popular reports, the hacktivist group Anonymous is not hacking, killing, or taking down the Internet today via DDoS attacks on root DNS servers. The Internet will remain completely functional.
Will the hacker group Anonymous make good on its threat to take down the Internet Saturday? Probably not. But it could slow it down, according to a number of security experts. And it may depend in part on how unified Anonymous is about the attack -- there are some indications of divisions within the group.
While Anonymous managed to take down Interpol's website on at the end of February and have defaced a number of vulnerable sites including, most recently, Panda Security, threats to take down bigger targets have often failed to materialize. What some believed to be the group's boldest plan yet—an effort to bring down the Internet's entire Domain Name System (DNS) in what they're calling #opGlobalBlackout
Two new projects to link Europe to Japan - one via the northern coast of Russia and the other via the North American coastline, will soon slash connection times between the two continents.
stratsec security researcher Sergei Shevchenko, has put together an indepth blog posting on the MS12-020 RDP vulnerability, showing that a mere 443 byte payload is all it would take to crash remote installations with a Blue Screen of Death.
Shevchenko compared the updated system files including Rdpcore.dll and RdpWD.sys to determine the exact code changes made and found modifications of the function HandleAttachUserReq(). Using this information, he went on to construct a 443 byte payload using the original packet crash provided by Luigi Auriemma.
Chinese telecommunications company ZTE has demonstrated an optical fiber network transmitting at a blazing 1.7TBs!
The network which uses Wavelength Division Mutiplexing separtes data into different wavelengths and transmits them over the same optical fiber. In the demonstration, ZTE made use of 8 different channels, each transmitting at 216.4Gbps and covered a distance of 1,087 miles over standard optical cables.
Don't hope of this coming to an ISP near you within the next 5 years though.
