Tags

administration

• Rename Computer

api

• Spamhaus DROP: Cloudflare WAF

apt

• Apt-Cacher NG

apt-cacher-ng

• Apt-Cacher NG

automation

• Cloud-Init VM Templates
• Schedule One-Time Commands
• Send Mail with msmtp

cheatsheet

• Command Reference

cloud-init

• Cloud-Init VM Templates

cloudflare

• Spamhaus DROP: Cloudflare WAF

commands

• Command Reference

dfir

• DKIM: Signature & Selector Check
• DMARC: Alignment Explained
• MD5/SHA256 File Hashes
• Outlook .msg to .eml on Linux
• SPF: What spf=pass Means

dkim

• DKIM: Signature & Selector Check

dmarc

• DMARC: Alignment Explained

dns

• DKIM: Signature & Selector Check
• DMARC: Alignment Explained
• SPF: What spf=pass Means

docker

• Docker & Docker Compose

email

• DKIM: Signature & Selector Check
• DMARC: Alignment Explained
• Outlook .msg to .eml on Linux
• SPF: What spf=pass Means

firewall

• Spamhaus DROP: nftables
• UFW Firewall

forensics

• MD5/SHA256 File Hashes

ftth

• Telekom FTTH Custom Router

hardening

• nginx: Block Direct IP Access
• nginx: ModSecurity WAF + CRS 4
• nginx: Rate Limiting

hashing

• MD5/SHA256 File Hashes

homelab

• Apt-Cacher NG
• Clear Swap Without Reboot
• Cloud-Init VM Templates
• LXC Password Reset
• Telekom FTTH Custom Router
• Windows 11 VM
• Windows 11 VM: RDP Drops
• WireGuard VPN

linux

• Apt-Cacher NG
• Clear Swap Without Reboot
• Command Reference
• Docker & Docker Compose
• Enable Remote Desktop (RDP)
• Extend LVM Volume
• MD5/SHA256 File Hashes
• Outlook .msg to .eml on Linux
• SSH Key Authentication
• Schedule One-Time Commands
• Send Mail with msmtp
• Spamhaus DROP: nftables
• TeamSpeak 3: Install
• TeamSpeak 3: Upgrade
• UFW Firewall
• Ubuntu 26.04: RDP from a Mac
• Unattended Upgrades
• WSL Essentials

lvm

• Extend LVM Volume

lxc

• LXC Password Reset

macos

• MD5/SHA256 File Hashes
• Ubuntu 26.04: RDP from a Mac

mail

• Send Mail with msmtp

maintenance

• Unattended Upgrades

memory

• Clear Swap Without Reboot

modsecurity

• nginx: ModSecurity WAF + CRS 4

msmtp

• Send Mail with msmtp

networking

• Telekom FTTH Custom Router

nftables

• Spamhaus DROP: nftables

nginx

• nginx: Block Direct IP Access
• nginx: ModSecurity WAF + CRS 4
• nginx: Rate Limiting

oobe

• Install with Local Account

outlook

• Outlook .msg to .eml on Linux

phishing

• DKIM: Signature & Selector Check
• DMARC: Alignment Explained
• Outlook .msg to .eml on Linux
• SPF: What spf=pass Means

powershell

• Rename Computer

pppoe

• Telekom FTTH Custom Router

proxmox

• Clear Swap Without Reboot
• Cloud-Init VM Templates
• LXC Password Reset
• Windows 11 VM
• Windows 11 VM: RDP Drops

rate-limiting

• nginx: Rate Limiting

rdp

• Enable Remote Desktop (RDP)
• Enable Remote Desktop (RDP)
• Ubuntu 26.04: RDP from a Mac
• Windows 11: Random RDP Drops

remote-desktop

• Enable Remote Desktop (RDP)
• Enable Remote Desktop (RDP)
• Ubuntu 26.04: RDP from a Mac
• Windows 11: Random RDP Drops

scheduling

• Schedule One-Time Commands

security

• SSH Key Authentication
• Spamhaus DROP: Cloudflare WAF
• Spamhaus DROP: nftables
• UFW Firewall
• Unattended Upgrades
• WireGuard VPN
• nginx: Block Direct IP Access
• nginx: ModSecurity WAF + CRS 4
• nginx: Rate Limiting

selfhosted

• Docker & Docker Compose
• TeamSpeak 3: Install
• TeamSpeak 3: Upgrade

setup

• Install with Local Account

soc

• DKIM: Signature & Selector Check
• DMARC: Alignment Explained
• MD5/SHA256 File Hashes
• Outlook .msg to .eml on Linux
• SPF: What spf=pass Means

spamhaus

• Spamhaus DROP: Cloudflare WAF
• Spamhaus DROP: nftables

spf

• SPF: What spf=pass Means

ssh

• SSH Key Authentication

storage

• Extend LVM Volume

systemd

• TeamSpeak 3: Install
• TeamSpeak 3: Upgrade

teamspeak

• TeamSpeak 3: Install
• TeamSpeak 3: Upgrade

telekom

• Telekom FTTH Custom Router

tls

• nginx: Block Direct IP Access

troubleshooting

• Windows 11 VM: RDP Drops
• Windows 11: Random RDP Drops

ubuntu

• Apt-Cacher NG
• Docker & Docker Compose
• Enable Remote Desktop (RDP)
• Extend LVM Volume
• SSH Key Authentication
• Schedule One-Time Commands
• Send Mail with msmtp
• TeamSpeak 3: Install
• TeamSpeak 3: Upgrade
• UFW Firewall
• Ubuntu 26.04: RDP from a Mac
• Unattended Upgrades
• WSL Essentials

ufw

• UFW Firewall

unifi

• Telekom FTTH Custom Router

virtualization

• Windows 11 VM
• Windows 11 VM: RDP Drops

vlan

• Telekom FTTH Custom Router

vpn

• WireGuard VPN

waf

• Spamhaus DROP: Cloudflare WAF
• nginx: ModSecurity WAF + CRS 4

windows

• Enable Remote Desktop (RDP)
• Install with Local Account
• MD5/SHA256 File Hashes
• Rename Computer
• WSL Essentials
• Windows 11 VM
• Windows 11 VM: RDP Drops
• Windows 11: Random RDP Drops

windows-11

• Enable Remote Desktop (RDP)
• Install with Local Account
• Rename Computer
• Windows 11 VM
• Windows 11 VM: RDP Drops
• Windows 11: Random RDP Drops

wireguard

• WireGuard VPN

wsl

• WSL Essentials

xrdp

• Enable Remote Desktop (RDP)