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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Hardening Arch Linux (monero.town)

submitted 8 months ago by chevy9294@monero.town to c/linux@lemmy.ml

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Hi, I'm in a process of making fast, (extrenely) secure, and modern laptop. Currently I have Arch Linux with encrypted root partition (unlocked with Nitrokey or long password), secure boot, linux-hardened, firewalld, etc.

I'm running linux-hardened with custom config. I enabled AMD SME, kernel lockdown, added some xanmod patch for more specific cpus, and disabled some unnedded drivers (only those that I'm 100% sure I don't need - Intel, NVidia, Microsoft, Google, Amazon, Virtio). Currently it takes ~50 minutes to recompile the kernel. Are there any tutorials what drivers to disable to speed up this process? After doing that I will try to compile it with -O3 and LTO. Do you know any patches for performance?

I'm planning to enable encrypted swap, install ClaimAV and install flatpak versions for every non open-source app I have.

I also want to have SELinux. Does anyone know where can I learn it? I had it on Fedora and it was not fun using it.

What are other ways I can make my laptop more secure?

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[–] vatson112@lemm.ee 1 points 8 months ago* (last edited 8 months ago)

There are also some kernel settings that you may find useful. Currently I am on the mobile and cannot remember the names. Text me if you need help

Network:

Enable rp and arp filter

Disable IP forwarding if you don't use docker

Disable tcp timestamp

Disable icmp broadcast

Enable syncookies

Enable source route checking

Other:

Enable hard and soft link protection (it is may broke your system, use carefully)

Enable kptr restrict

Disable kexec

Disable sysrq

Enable randomize virtual memory address

Disable JIT for ebpf programms

Disable loading drivers via modprobe in live kernel.

Also check which hardware mitigations is disabled in your kernel. (Spectre, meltdawn) You may enable KASL

Also use selinux or apparmor. I prefer Selinux.

Enable auditd and configure it for auditing actions that your find useful.