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Update sysctl settings recommendations (#251)

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* Update sysctl settings recommendations
* Update author names

Signed-off-by: Tommy <contact@tommytran.io>
Co-authored-by: wj25czxj47bu6q <96372288+wj25czxj47bu6q@users.noreply.github.com>
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Tommy 2024-06-16 13:47:54 -07:00 committed by GitHub
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content/posts/linux/Desktop Linux Hardening.md
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@ -2,7 +2,7 @@
title: "Desktop Linux Hardening" title: "Desktop Linux Hardening"
date: 2022-08-17 date: 2022-08-17
tags: ['Operating Systems', 'Linux', 'Privacy', 'Security'] tags: ['Operating Systems', 'Linux', 'Privacy', 'Security']
author: Tommy author: Tommy, wj25czxj47bu6q
--- ---
Linux is [not a secure desktop operating system](/posts/linux/linux-insecurities/). However, there are steps you can take to harden it, reduce its attack surface, and improve its privacy. Linux is [not a secure desktop operating system](/posts/linux/linux-insecurities/). However, there are steps you can take to harden it, reduce its attack surface, and improve its privacy.
@ -33,7 +33,7 @@ Depending on your distribution, encrypted swap may be automatically set up if yo
Most desktop Linux distributions including Fedora, openSUSE, Ubuntu, and so on come with [NetworkManager](https://en.wikipedia.org/wiki/NetworkManager) by default to configure Ethernet and Wi-Fi settings. Most desktop Linux distributions including Fedora, openSUSE, Ubuntu, and so on come with [NetworkManager](https://en.wikipedia.org/wiki/NetworkManager) by default to configure Ethernet and Wi-Fi settings.
WfKe9vLwSvv7rN has detailed guide on [trackability reduction with NetworkManager](/posts/linux/networkmanager-trackability-reduction/) which I highly recommend you check out. wj25czxj47bu6q has detailed guide on [trackability reduction with NetworkManager](/posts/linux/networkmanager-trackability-reduction/) which I highly recommend you check out.
In short, if you use NetworkManager, add the following to your `/etc/NetworkManager/conf.d/00-macrandomize.conf`: In short, if you use NetworkManager, add the following to your `/etc/NetworkManager/conf.d/00-macrandomize.conf`:
``` ```
@ -285,9 +285,9 @@ _This section extensively references [Madaidan's Linux Hardening Guide](https://
_See ["2.2&nbsp;Sysctl"](https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl) in Madaidan's guide._ _See ["2.2&nbsp;Sysctl"](https://madaidans-insecurities.github.io/guides/linux-hardening.html#sysctl) in Madaidan's guide._
Madaidan recommends that you disable [unprivileged user namespaces](https://github.com/sangam14/CloudNativeLab/blob/master/LXC/Linux%20Containers/User_namespaces.md) due to the [significant attack surface for privilege escalation](https://madaidans-insecurities.github.io/linux.html#kernel). However, some software such as Podman and LXC relies on unprivileged user namespaces. If you wish to use such software, do not disable `kernel.unprivileged_userns_clone`. Madaidan recommends that you disable [unprivileged user namespaces](https://github.com/sangam14/CloudNativeLab/blob/master/LXC/Linux%20Containers/User_namespaces.md) due to the [significant attack surface for privilege escalation](https://madaidans-insecurities.github.io/linux.html#kernel). However, some software such as Podman and LXC relies on unprivileged user namespaces. If you wish to use such software, do not disable `kernel.unprivileged_userns_clone`. Note that this setting does not exist in the upstream kernel and is added downstream by some distributions.
If you are using Kicksecure or Whonix, most of this hardening is included by default. If you are using Debian, you should consider [morphing it into Kicksecure](https://www.kicksecure.com/wiki/Debian). On other distributions, you can copy the [configuration files from Kicksecure](https://github.com/Kicksecure/security-misc/tree/master/usr/lib/sysctl.d) into `/etc/sysctl.d/` (but note that these configurations do not disable unprivileged user namespaces). If you are using Kicksecure or Whonix, most of this hardening is included by default. If you are using Debian, you should consider [morphing it into Kicksecure](https://www.kicksecure.com/wiki/Debian). On other distributions, you can copy the configuration file from [Tommy's repository](https://github.com/TommyTran732/Linux-Setup-Scripts/blob/main/etc/sysctl.d/99-workstation.conf).
#### Boot Parameters #### Boot Parameters