Language Selection

English French German Italian Portuguese Spanish

SSH Security Primer: Server Security Settings

Filed under
HowTos

My previous article in this series discussed SSH client security settings. To summarize, if you can’t control installations of rogue SSH clients, your only control is to limit outbound access through firewalling or other network-layer controls. Another of my articles discusses the issues with allowing outbound SSH access to the Internet.

SSH Servers: A Basic Risk Analysis

How do you secure your SSH servers? What are the total risks of such servers to your organization? You’re well aware of the possibility of people hacking your server and getting unauthorized access. That’s bad. But there are other risks. The SANS Institute’s Top 20 risk list really stresses SSH risks. If compromised, that host can be a router/forwarder that will forward any kind of traffic to any host the p0wned box can access—even your "secured" hosts given Internet Assigned Numbers Authority (IANA) reserved IP addresses. (Read RFC 3330 and RFC 1918 for the gory details on these addresses.) In most cases, those addresses aren’t accessible over the Internet.

More of a concern is your host’s threat to the rest of the Internet.

Full Story.

More in Tux Machines

Leftovers: Gaming

today's howtos

Leftovers: Software

Intel Beignet Is Working Out Surprisingly Well For OpenCL On Linux

Beignet is the project out of Intel's Open-Source Technology Center for exposing GPGPU/compute capabilities out of Ivy Bridge hardware and newer when using a fully open-source Linux stack. While Beignet differs greatly from Gallium3D's Clover state tracker, this Intel-specific open-source OpenCL implementation is working out quite well for Ubuntu Linux. While I've been writing about Intel's Beignet project since early 2013, it's probably been about a year now since I tried out the code, which is developed by Intel's OTC graphics team in China. This weekend I tried out Beignet v0.9.2 as trying out the newest Intel OpenCL code has been on my TODO list for a while and it's been working out rather well in my initial tests. Read more