Language Selection

English French German Italian Portuguese Spanish

User Mode Linux: Maximizing performance, jailing attackers

Filed under
Interviews

User Mode Linux (UML)has ideal security features for controlling and jailing hackers once they've taken the sweetened bait of a 'honeypot,' says User Mode Linuxauthor and project architect Jeff Dike. UML can log all terminal traffic to the host in a way that's invisible and impossible to interfere with from inside the UML unlike Xen and VMware.

Take a tour of UML with Dike as he offers best practices, explains how to boot from an empty jail, talks about jailing attackers and more.

What are some unique issues of server consolidation with User Mode Linux?

Jeff Dike: From my point of view, server consolidation doesn't differ greatly from any other virtualization workload. So, the advantages of UML apply here the same as in other areas.

One aspect of server consolidation that may distinguish it from other virtualization workloads is that the host administrator may not trust the UML administrators. In this case, the UML administrators won't have shell access on the host, and the host administrator will need to decide how they will be allowed to access their UMLs.

The easy solution is to allow only network access. But this will increase the support burden when UML owners make their UMLs inaccessible by misconfiguring their networks. In this case, allowing the equivalent of logging in on a hardwired terminal would be nice, so that the UML admins still have access to their UMLs and can fix the network themselves.

So how should host administrators determine access criteria for UML?

Full Story.

More in Tux Machines

KDE Says Its Next Plasma Desktop Release Will Start a Full Second Faster

According to the developer, the upcoming KDE Plasma 5.13 desktop environment release will start a full second faster than previous versions because of the removal of the QmlObjectIncubationController component, which apparently slowed down the entire desktop, and promises to let users pin apps on the panel that contain spaces in their desktop file names. Goodies are also coming to the upcoming KDE Applications 18.04 software suite this spring, which makes creating of new files with the Dolphin file manager instantaneous, improves drag-and-drop support from Spectacle to Chromium, and lets users configure the Gwenview image viewer to no longer display the image action buttons on thumbnails when they hover with the mouse cursor over them. Read more

Intel Coffee Lake OpenGL Performance On Windows 10 vs. Linux

For those curious about the state of Intel's open-source Mesa OpenGL driver relative to the company's closed-source Windows OpenGL driver, here are some fresh benchmark results when making use of an Intel Core i7 8700K "Coffee Lake" processor with UHD Graphics 630 and testing from Windows 10 Pro x64 against Ubuntu 16.04.3 LTS, Ubuntu with the Linux 4.16 Git kernel and Mesa 18.1-dev, and then Intel's own Clear Linux distribution. Read more

Why open source could be IBM's key to future success in the cloud

Do those same developers need IBM? Developers certainly benefit from IBM's investments in open source, but it's not as clear that those same developers have much to gain from IBM's cloud. Google, for example, has done a stellar job open sourcing code like TensorFlow and Kubernetes that feeds naturally into running related workloads on Google Cloud Platform. Aside from touting its Java bonafides, however, IBM has yet to demonstrate that developers get significant benefits for modern workloads on its cloud. That's IBM's big challenge: Translating its open source expertise into real, differentiated value for developers on its cloud. Read more

Top 8 Debian-Based Distros

Most people tend to forget that despite Ubuntu's success over the years, it's still just a distro based on another distro - Debian. Debian on its own, however, isn't really well suited for newer users...hence the explosion of distros based on Debian over the recent years. There are lot of great choices for Linux users. Which one is best for you? Read more