Increase Linux Internet speed with TCP BBR congestion control

I recently read that TCP BBR has significantly increased throughput and reduced latency for connections on Google’s internal backbone networks and google.com and YouTube Web servers throughput by 4 percent on average globally – and by more than 14 percent in some countries. The TCP BBR patch needs to be applied to the Linux kernel.

Source: Increase Linux Internet speed with TCP BBR congestion control – nixCraft

CentOS Replacements For Your Production Linux Servers

If you are currently using CentOS 8, you will have to find an alternative operating system. This is because its end-of-life cycle has been cut short in December 2021. But if you use CentOS 7, you do not have to take any action right now. This is because CentOS 7 will reach its End-of-Life on June 30th, 2024.

Source: CentOS Replacements For Your Production Linux Servers

Stupid me installed CentOS 8 in December 2020 instead of 7 without reading the news about this.

New Bluetooth hack can unlock your Tesla—and all kinds of other devices

This class of hack is known as a relay attack, a close cousin of the person-in-the-middle attack. In its simplest form, a relay attack requires two attackers. In the case of the locked Tesla, the first attacker, which we’ll call Attacker 1, is in close proximity to the car while it’s out of range of the authenticating phone. Attacker 2, meanwhile, is in close proximity to the legitimate phone used to unlock the vehicle. Attacker 1 and Attacker 2 have an open Internet connection that allows them to exchange data.

Source: New Bluetooth hack can unlock your Tesla—and all kinds of other devices | Ars Technica

Researcher uses 379-year-old algorithm to crack crypto keys found in the wild

Fermat’s algorithm was based on the fact that any odd number can be expressed as the difference between two squares. When the factors are near the root of the number, they can be calculated easily and quickly. The method isn’t feasible when factors are truly random and hence far apart.

Source: Researcher uses 379-year-old algorithm to crack crypto keys found in the wild | Ars Technica

CentOS Linux 8 is about to die. What do you do next?

The end of CentOS 8 Linux has been coming for awhile now, and the day is finally here. On December 31, 2021, Red Hat‘s CentOS Linux 8 will reach End Of Life (EOL). Since that falls right in the heart of the holiday season, Red Hat will extend CentOS Linux 8 zero-day support until January 31, 2022. Indeed, there will be one last CentOS Linux 8 release — perhaps even after CentOS 8’s official EOL. After that, it’s all over for CentOS Linux.

Source: CentOS Linux 8 is about to die. What do you do next? | ZDNet

Yikes!  Just heard about this.  Last year I chose CentOS 8 over 7 for this server so I would not have to deal with end of life issues for awhile.  It appears CentOS 7 will be good until 2024 and 8 ends today.  Ugh.

Log4j flaw: Attackers are making thousands of attempts to exploit this severe vulnerability

Log4j is used in many forms of enterprise and open-source software, including cloud platforms, web applications and email services, meaning that there’s a wide range of software that could be at risk from attempts to exploit the vulnerability.

Source: Log4j flaw: Attackers are making thousands of attempts to exploit this severe vulnerability | ZDNet

Nuclear penalized multinomial regression with an application to predicting at bat outcomes in baseball

We propose the nuclear norm penalty as an alternative to the ridge penalty for regularized multinomial regression. This convex relaxation of reduced-rank multinomial regression has the advantage of leveraging underlying structure among the response categories to make better predictions. We apply our method, nuclear penalized multinomial regression (NPMR), to Major League Baseball play-by-play data to predict outcome probabilities based on batter-pitcher matchups. The interpretation of the results meshes well with subject-area expertise and also suggests a novel understanding of what differentiates players.

Source: [1706.10272] Nuclear penalized multinomial regression with an application to predicting at bat outcomes in baseball