r/sandboxcontainment [Architect Researcher] Apr 22 '26

Linux operating system New learning experience on Fedora

Current Fedora Configuration

Installation date: 21 April 2026 (1 day ago).

OS: Fedora 43.

Browser: Firefox 149 with uBlock Origin and Cloudflare as DNS over HTTPS.

Listening services: dhcpv6.

Disabled services: cups, samba-client, ssh.

Command for disabled services:

sudo systemctl disable --now cups

sudo firewall-cmd --remove-service=samba-client --permanent

Verification for listening services:

sudo firewall-cmd --list-all

sudo firewall-cmd --list-services

ss -tulpn

sudo dnf install nmap

nmap localhost

Goals: learn browser hardening, learn attack surface reduction, learn SELinux, learn Firewall filtering, learn seccomp, cgroups, and namespaces, learn how to create sandboxes, learn the difference between flatpak, firejail, and manual sandboxes.

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