HostGuard

ClawGuard

Security assistant for OpenClaw. Check whether the local OpenClaw service is reachable beyond localhost and whether it is running with elevated privileges.

Features

• 🔒 Network Binding Check: Detect if OpenClaw is exposed beyond localhost
• 🔐 Privilege Check: Detect if running with elevated privileges (root/admin)
• 📋 Configuration Analysis: Review host/port settings in env files
• 🔧 Conservative Fix: Offer safe lockdown recommendations

Trigger Conditions

• "Check OpenClaw security" / "检查OpenClaw安全"
• "Is OpenClaw exposed?" / "OpenClaw是否暴露?"
• "Check if running as root" / "检查是否以root运行"
• "Lockdown OpenClaw" / "锁定OpenClaw"
• "claw-guard"

---

Quick Check Commands

Check Network Binding (macOS/Linux)

# Find OpenClaw process and check binding
PORT=${OPENCLAW_PORT:-18789}
echo "Checking port $PORT..."
lsof -i :$PORT -P -n 2>/dev/null | grep LISTEN || echo "No listener on port $PORT"

Check Privilege

# Check if running as root
if [ "$(id -u)" = "0" ]; then
  echo "⚠️ Running as root (elevated privileges)"
else
  echo "✅ Running as user $(whoami) (uid=$(id -u))"
fi

Check Configuration

# Check env files for HOST setting
for f in .env.local .env.development .env.production .env; do
  if [ -f "$f" ]; then
    HOST_VAL=$(grep -E "^(OPENCLAW_HOST|HOST)=" "$f" 2>/dev/null | cut -d= -f2)
    if [ -n "$HOST_VAL" ]; then
      echo "Found HOST=$HOST_VAL in $f"
    fi
  fi
done

Full Security Check

# Run all checks
echo "🛡️ ClawGuard Security Check"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━"

# 1. Check user
echo ""
echo "🔐 User/Privilege:"
if [ "$(id -u)" = "0" ]; then
  echo "  ⚠️ Running as root"
else
  echo "  ✅ Running as $(whoami) (uid=$(id -u))"
fi

# 2. Check port
PORT=${OPENCLAW_PORT:-18789}
echo ""
echo "🔌 Network Binding (port $PORT):"
LISTEN_INFO=$(lsof -i :$PORT -P -n 2>/dev/null | grep LISTEN)
if [ -n "$LISTEN_INFO" ]; then
  echo "  $LISTEN_INFO"
  if echo "$LISTEN_INFO" | grep -q "127.0.0.1"; then
    echo "  ✅ Loopback only (safe)"
  elif echo "$LISTEN_INFO" | grep -q "0.0.0.0\|::"; then
    echo "  ⚠️ Listening on all interfaces (may be exposed)"
  else
    echo "  ℹ️ Check binding manually"
  fi
else
  echo "  ℹ️ No listener detected"
fi

# 3. Check config
echo ""
echo "📋 Configuration:"
for f in .env.local .env.development .env.production .env; do
  if [ -f "$f" ]; then
    HOST_VAL=$(grep -E "^(OPENCLAW_HOST|HOST)=" "$f" 2>/dev/null | cut -d= -f2)
    if [ -n "$HOST_VAL" ]; then
      echo "  $f: HOST=$HOST_VAL"
    fi
  fi
done

echo ""
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━"

---

What to Check

1. Configuration Check

Read local env files in this order:

• .env.local
• .env.development
• .env.production
• .env

Look for:

• OPENCLAW_HOST or HOST
• OPENCLAW_PORT or PORT
• Default port: 18789

2. Network Binding Check

Use system commands to check if the port is listening:

• lsof -i :{port} (macOS/Linux)
• netstat -tlnp | grep {port} (Linux)
• netstat -ano | findstr :{port} (Windows)

Classify the binding:

• loopback only (127.0.0.1, ::1) → ✅ Safe
• wildcard (0.0.0.0, ::) → ⚠️ May be exposed
• private network (10.x, 192.168.x) → ⚠️ Local network only
• public address → ❌ Potentially exposed

3. Privilege Check

Check if running with elevated privileges:

• Unix: Check if uid == 0 (root)
• Windows: Check for Administrator group membership

---

Reporting Behavior

• Distinguish runtime listener state from config file state
• Do not claim definite public exposure based only on 0.0.0.0 or ::
• Use wording like "may be reachable beyond localhost" unless you have stronger evidence
• If no active listener is detected, say so explicitly
• Elevated privileges are a warning, not proof of compromise

---

Fix Behavior

• Never modify files without explicit user permission
• Only offer a fix when an existing HOST or OPENCLAW_HOST entry is present
• Before editing, create a .bak backup beside the file
• Change only the host value to 127.0.0.1
• Preserve comments and quoting where possible
• If no existing host entry is found, explain that the active config source may be elsewhere

---

Example Report

🛡️ ClawGuard Security Report
━━━━━━━━━━━━━━━━━━━━━━━━━━━━

📋 Configuration
├─ Host: 127.0.0.1 (from .env)
├─ Port: 18789
└─ Status: ✅ Loopback only

🔌 Network Binding
├─ Listening: Yes
├─ Binding: 127.0.0.1:18789
└─ Assessment: ✅ Local only

🔐 Privileges
├─ User: bingo (uid=501)
└─ Status: ✅ Not elevated

━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎯 Conclusion: ✅ Secure configuration

---

Error Handling

No env file found     → "⚠️ No configuration file found"
Port not listening    → "ℹ️ No active listener detected"
Permission denied     → "❌ Cannot check privileges"
Command not available → "⚠️ Required tool not available"

---

Notes

• This is a read-only security assessment tool
• No files are modified without explicit permission
• All checks are conservative and non-invasive
• Use system tools (lsof, netstat, whoami) for detection