Basics
Beginner
Understanding Linux Users, Groups & File Permissions
Who is allowed to do what on your server? This foundational guide explains users, groups and file permissions with real …
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8 min read
Tag
Security: guides & tutorials
All Serverküche tutorials tagged Security – hands-on step-by-step self-hosting guides for your own server.
7 tutorials
All tutorials
Security
Intermediate
Setting up a WireGuard VPN: secure access to your own server
A lean WireGuard VPN natively on the netcup server: keys, server and client config, firewall, phone QR – plus the Docker …
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12 min read
Security
Advanced
CrowdSec: modern, collaborative intrusion prevention
Set up CrowdSec with the Traefik bouncer: detect attacks from the access logs, block attackers with a 403 and benefit …
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17 min read
Applications
Intermediate
Hardening & optimizing Nextcloud: clear every warning (part 2)
Get your Nextcloud admin overview green: set up HSTS headers, email sending, enforced two-factor auth and brute-force …
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13 min read
Security
Intermediate
Restic backups: encrypted and off-site
Off-site backups with Restic: set up encrypted, restore snapshots, prune with retention and automate via a systemd …
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12 min read
Security
Intermediate
Setting up Fail2ban: block brute-force attacks automatically
Fail2ban watches your logs and bans IPs after too many failed attempts – with a safe whitelist for your own address so …
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8 min read
netcup
Intermediate
Setting up the netcup firewall in the SCP (with the stateless-UDP trick)
Set up the netcup firewall as network protection in front of the server: composable policy templates in the SCP – with …
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11 min read