OpenClaw Server Security & Installation

Overview

This skill guides the setup of a secure, self-hosted OpenClaw instance. It covers SSH hardening, Firewall configuration, Tailscale VPN setup, and the OpenClaw installation itself.

Workflow

Phase 1: System Hardening

1. Lock down SSH

   • Goal: Keys only, no passwords, no root login.
   • Action: Modify /etc/ssh/sshd_config.
   • Commands:

     # Backup config
     sudo cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
     # Disable Password Auth
     sudo sed -i 's/^#*PasswordAuthentication .*/PasswordAuthentication no/' /etc/ssh/sshd_config
     # Disable Root Login
     sudo sed -i 's/^#*PermitRootLogin .*/PermitRootLogin no/' /etc/ssh/sshd_config
     # Reload SSH
     sudo sshd -t && sudo systemctl reload ssh
     

2. Default-deny Firewall

   • Goal: Block everything incoming by default.
   • Action: Install and enable UFW.
   • Commands:

     sudo apt update && sudo apt install ufw -y
     sudo ufw default deny incoming
     sudo ufw default allow outgoing
     sudo ufw enable
     

     Note: Ensure you have console access or a fallback before enabling if SSH is not yet allowed on another interface, though we configure Tailscale next.

3. Brute-force Protection

   • Goal: Auto-ban IPs after failed login attempts.
   • Action: Install Fail2ban.
   • Commands:

     sudo apt install fail2ban -y
     sudo systemctl enable --now fail2ban
     

Phase 2: Network Privacy (Tailscale)

1. Install Tailscale

   • Goal: Create a private VPN mesh network.
   • Commands:

     curl -fsSL https://tailscale.com/install.sh | sh
     sudo tailscale up
     

   • Wait for user to authenticate the Tailscale link.

2. Configure SSH & Web via Tailscale

   • Goal: Allow traffic only from the Tailscale subnet (100.64.0.0/10) and remove public access.
   • Commands:

     # Allow SSH over Tailscale
     sudo ufw allow from 100.64.0.0/10 to any port 22 proto tcp
     # Remove public SSH access (Adjust rule name/number as needed)
     sudo ufw delete allow OpenSSH || sudo ufw delete allow 22/tcp
     # Allow Web ports over Tailscale
     sudo ufw allow from 100.64.0.0/10 to any port 443 proto tcp
     sudo ufw allow from 100.64.0.0/10 to any port 80 proto tcp
     

3. Disable IPv6 (Optional)

   • Goal: Reduce attack surface.
   • Commands:

     sudo sed -i 's/IPV6=yes/IPV6=no/' /etc/default/ufw
     if ! grep -q "net.ipv6.conf.all.disable_ipv6 = 1" /etc/sysctl.conf; then
       echo "net.ipv6.conf.all.disable_ipv6 = 1" | sudo tee -a /etc/sysctl.conf
     fi
     sudo sysctl -p && sudo ufw reload
     

Phase 3: OpenClaw Installation

1. Install OpenClaw

   • Commands:

     npm install -g openclaw && openclaw doctor
     

2. Configure Owner Access

   • Required Input: Ask the user for their Telegram ID.
   • Action: Update the config to allowlist only that ID.
   • JSON Config Target (verify location via openclaw doctor):

     { 
       "dmPolicy": "allowlist", 
       "allowFrom": ["YOUR_TELEGRAM_ID"], 
       "groupPolicy": "allowlist" 
     }
     

3. Secure Credentials

   • Goal: Restrict file permissions.
   • Commands:

     chmod 700 ~/.openclaw/credentials 2>/dev/null || true
     chmod 600 .env 2>/dev/null || true
     

4. Final Audit

   • Action: Run the built-in security audit.
   • Command:

     openclaw security audit --deep
     

Verification Status

Run to confirm:

sudo ufw status verbose
ss -tulnp
tailscale status
openclaw doctor