How does iptables hashlimit module work?

Hashlimit is an iptables module that allows one to define rules that in effect will limit traffic speed (bytes / time unit) or frequency (connections / time unit) per target or origin ports / IPs. The inner workings of this module and / or how to make it work correctly remains a mystery for many.

Hashlimit is also close friends with the limit module, only much more powerful, capable of expressing rate limiting per source IP (for example) in a single rule.

Source: Stuff I do: How does iptables hashlimit module work?

IEEE sets new Ethernet standard that brings 5X the speed without disruptive cable changes

“Going beyond 1 Gb/s with existing Cat5e and Cat6 cables was little more than a talking point two years ago. But now with NBASE-T, we have the ability to extend the life of an enormous asset —your wired network. The Cat5e and Cat6 installed in just the last 15 years now exceeds an estimated 70 billion meters of cabling, which is more than 10 trips to Pluto,”

Source: IEEE sets new Ethernet standard that brings 5X the speed without disruptive cable changes

How to permanently stop Windows 10 reboots after installing updates

If you do not want to wait for Anniversary Update (which will be released in July 2016) or if Active Hours is not a solution for you, you can permanently stop Windows 10 reboots after updates are installed if you follow the steps below.

via How to permanently stop Windows 10 reboots after installing updates

Just bought a refurbished I7 machine with Windows 10 Home edition to use for gaming  and run VMs via Virtual Box.  The VMs need to be up 24/7 if they are an active unit.   This box has a lot of RAM so it can run many VMs.  Microsoft brought them all down last night with an update then reboot.  This is totally unacceptable.  Most of the solutions on the web using gpedit.msc or regedit do not work on Windows Home since we are the lowest OS on the MS totem pole.

The procedure in the above website worked for Windows 10 Home.   Now I just have to wait a week or so to see if it really stops the auto reboot.  I don’t mind having to queue up updates that require reboot.  VMs  need to be shutdown gracefully.  Many people use their computers for doing things other than consuming mass media.

Philae Found! Rosetta Spies Dead Comet Lander

Now, in photographs taken by Rosetta’s OSIRIS camera as the spacecraft zoomed within 2.7 kilometers (1.6 miles) of the comet’s surface on Sept. 2, the guesswork of Philae’s fate can be put to rest. The lander really did end up on its side, with two of its three legs awkwardly poking upwards. It seems to be jammed in a dark crack, proving why it was so hard to maintain contact with the robot after landing.

Source: Philae Found! Rosetta Spies Dead Comet Lander

Microsoft and Liebherr Collaborating on New Generation of Smart Refrigerators

With the SmartDevice capability, future Liebherr refrigerators will help in shopping and planning meals with intelligent food management. Stored groceries can be monitored using internal cameras and object recognition technology. This process not only captures images for viewing but also recognizes individual food items inside the refrigerator. This information flows automatically into an inventory list, which lets the customer see quickly and clearly what is in the refrigerator from anywhere. Using the SmartDeviceBox voice module, additional groceries can be added to a shopping list that customers can access when on the move using an app for iOS, Android or Windows devices.

Source: Microsoft and Liebherr Collaborating on New Generation of Smart Refrigerators | Cortana Intelligence and Machine Learning Blog

Think Before You Parallelize

The loop abstractions examined here are just one type of parallel or concurrent programming abstraction available. There is a whole universe out there, Actor Models, Async/Await, Tasks, Thread Pools, and so on. Be sure to understand what you are using, and measure whether it will really be useful, or whether you should focus on fast single threaded algorithms or look for third party tools with better performance.

Source: Think Before You Parallelize

With Windows 10, Microsoft Blatantly Disregards User Choice and Privacy

The tactics Microsoft employed to get users of earlier versions of Windows to upgrade to Windows 10 went from annoying to downright malicious. Some highlights: Microsoft installed an app in users’ system trays advertising the free upgrade to Windows 10. The app couldn’t be easily hidden or removed, but some enterprising users figured out a way. Then, the company kept changing the app and bundling it into various security patches, creating a cat-and-mouse game to uninstall it.

Source: With Windows 10, Microsoft Blatantly Disregards User Choice and Privacy: A Deep Dive | Electronic Frontier Foundation

And while users can disable some of these settings, it is not a guarantee that your computer will stop talking to Microsoft’s servers. A significant issue is the telemetry data the company receives. While Microsoft insists that it aggregates and anonymizes this data, it hasn’t explained just how it does so.

NanoRacks To Catalyze Concepts for Deep Space Habitats

The Ixion Team is a new addition to NASA’s NextSTEP effort, and will begin by conducting a comprehensive feasibility study evaluating the conversion of rocket upper stages into habitats. This innovative approach offers a pathway that is more affordable and involves less risk than fabricating modules on the ground and subsequently launching them into orbit.

Source: NanoRacks To Catalyze Concepts for Deep Space Habitats

GE is building America’s first offshore wind farm with turbines twice as tall as the Statue of Liberty

GE and Deepwater Wind, a developer of offshore turbines, are installing five massive wind turbines in the middle of the Atlantic Ocean. They will make up the first offshore wind farm in North America, called the Block Island Wind Farm.

Over the past several weeks, the teams have worked to install the turbines 30 miles off the coast of Rhode Island, and are expected to finish by the end of August 2016. The farm will be fully operational by November 2016.

Source: GE is building America’s first offshore wind farm with turbines twice as tall as the Statue of Liberty

Social Security Administration Now Requires Two-Factor Authentication

Sadly, it is still relatively easy for thieves to create an account in the name of Americans who have not already created one for themselves. All one would need is the target’s name, date of birth, Social Security number, residential address, and phone number. This personal data can be bought for roughly $3-$4 from a variety of cybercrime shops online.

After that, the SSA relays four multiple-guess, so-called “knowledge-based authentication” or KBA questions from credit bureau Equifax. In practice, many of these KBA questions — such as previous address, loan amounts and dates — can be successfully enumerated with random guessing.  What’s more, very often the answers to these questions can be found by consulting free online services, such as Zillow and Facebook.

Source: Social Security Administration Now Requires Two-Factor Authentication — Krebs on Security