Designed for Debian 13 (Trixie) & Raspberry Pi OS

Harden Your Linux Servers in 60 Seconds

Stop leaving your Linux servers exposed to automated botnets, credential stuffing, and kernel exploits.

Whether you are spinning up a fresh Debian 13 VPS on DigitalOcean/AWS or hardening a Raspberry Pi OS node at home, configuring enterprise-grade security manually takes hours—and one wrong line in sshd_config can lock you out permanently. The Debian Hardening Suite is a bulletproof, production-tested automation utility engineered for system administrators, DevOps engineers, and self-hosters who demand elite security without the configuration headache.

Debian & Raspberry Pi OS Hardening Suite Banner

Get Hardening Suite — $19

Includes AMD64 & ARM64 standalone binaries + Lifetime updates

root@debian-vps:~# sudo ./harden-debian-amd64

Enter your Gumroad License Key: [********]

✓ Gumroad license verified successfully. Proceeding with hardening.

[+] Detected active SSH service unit: ssh.service

[+] Select SSH port: [1] 2222 (Recommended)

✓ System secured successfully. Zero lockouts detected.

🛡️ What Gets Secured Automatically

Enterprise security profiles compiled into a single automated script.

Dedicated Admin Provisioning

Bypasses hidden default cloud accounts (debian/ubuntu), forces a dedicated sudo-capable user, and enforces interactive password creation with state verification.

OpenSSH Lockdown

Moves SSH to a custom port, completely disables root password logins, strips X11 forwarding vulnerabilities, and configures strict key-only authentication.

UFW Firewall Engineering

Default-deny incoming policy with selective port allowances and an optional, interactive IPv6 toggle to keep firewall logs clean.

Systemd-Backed Fail2ban

Actively monitors your custom SSH port via the systemd journal to instantly ban brute-force attackers.

Advanced Kernel & Network Sysctl

Writes a hardened profile (/etc/sysctl.d/99-security.conf) protecting against IP spoofing, SYN floods, ICMP redirects, and memory exploitation (ASLR).

Zero-Lockout Safety Net

Generates timestamped backups (/var/backups/debian-hardening/) with instant out-of-band rollback commands provided in every completion summary.

🔒 Integrated License Key Security

This release includes built-in automated license verification. When executed on your server, the script prompts for your valid Gumroad License Key and securely pings Gumroad's API (https://api.gumroad.com/v2/licenses/verify) to ensure authorized usage before any system modifications occur.

📦 What’s Included in Your Download (`harden-debian-v1.1.7.zip`)

•
harden-debian-amd64 — Standalone binary for x86_64 cloud servers (AWS, DigitalOcean).
•
harden-debian-arm64 — Standalone binary for Raspberry Pi OS & ARM64 VPS.
•
SHA256SUMS & README.md — Verification and documentation.

💰 Choose Your License Tier

Includes automated Gumroad API license verification and compiled binaries.

Standard License

For personal servers, home labs, and indie developers.

$19

✓ Single-user license
✓ AMD64 & ARM64 binaries
✓ Built-in license verification

Get Standard — $19

Popular

Pro / Team License

For agencies, freelancers, and multi-server management.

$49

✓ Client deployment rights
✓ Priority support & updates
✓ Multi-server environments

Get Pro License — $49