Cloudflare

Cloudflare Services Skill

Comprehensive management of Cloudflare services including DNS, Tunnels, Zero Trust, WAF, Workers, and Pages.

Triggers

Use this skill when you see:

• cloudflare, cf, cloudflare tunnel
• argo tunnel, cloudflared, zero trust
• cloudflare workers, cloudflare pages
• waf, ddos protection, cdn
• dns management, cloudflare dns

Instructions

Cloudflare Tunnel Setup

Install cloudflared

# Linux
curl -L --output cloudflared.deb https://github.com/cloudflare/cloudflared/releases/latest/download/cloudflared-linux-amd64.deb
sudo dpkg -i cloudflared.deb

# macOS
brew install cloudflared

# Windows (winget)
winget install --id Cloudflare.cloudflared

Authenticate and Create Tunnel

# Login to Cloudflare
cloudflared tunnel login

# Create tunnel
cloudflared tunnel create my-tunnel

# List tunnels
cloudflared tunnel list

# Route DNS to tunnel
cloudflared tunnel route dns my-tunnel app.example.com

Tunnel Configuration

# ~/.cloudflared/config.yml
tunnel: <TUNNEL-ID>
credentials-file: /root/.cloudflared/<TUNNEL-ID>.json

ingress:
  # Route to local web server
  - hostname: app.example.com
    service: http://localhost:3000

  # Route to another service
  - hostname: api.example.com
    service: http://localhost:8080

  # SSH access
  - hostname: ssh.example.com
    service: ssh://localhost:22

  # Catch-all (required)
  - service: http_status:404

Run Tunnel

# Run tunnel
cloudflared tunnel run my-tunnel

# Install as service
sudo cloudflared service install

# Run with specific config
cloudflared tunnel --config ~/.cloudflared/config.yml run

DNS Management

# Using Cloudflare API
# Set API token
export CF_API_TOKEN="your-api-token"
export CF_ZONE_ID="your-zone-id"

# List DNS records
curl -X GET "https://api.cloudflare.com/client/v4/zones/${CF_ZONE_ID}/dns_records" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json"

# Create A record
curl -X POST "https://api.cloudflare.com/client/v4/zones/${CF_ZONE_ID}/dns_records" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json" \
  --data '{
    "type": "A",
    "name": "app",
    "content": "192.0.2.1",
    "ttl": 1,
    "proxied": true
  }'

# Create CNAME record
curl -X POST "https://api.cloudflare.com/client/v4/zones/${CF_ZONE_ID}/dns_records" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json" \
  --data '{
    "type": "CNAME",
    "name": "www",
    "content": "example.com",
    "ttl": 1,
    "proxied": true
  }'

Cloudflare Workers

Basic Worker

// worker.js
export default {
  async fetch(request, env, ctx) {
    const url = new URL(request.url);

    // Handle different paths
    if (url.pathname === '/api/hello') {
      return new Response(JSON.stringify({ message: 'Hello World' }), {
        headers: { 'Content-Type': 'application/json' },
      });
    }

    // Proxy to origin
    return fetch(request);
  },
};

Worker with KV Storage

export default {
  async fetch(request, env) {
    const url = new URL(request.url);
    const key = url.pathname.slice(1);

    if (request.method === 'GET') {
      const value = await env.MY_KV.get(key);
      return new Response(value || 'Not found', {
        status: value ? 200 : 404,
      });
    }

    if (request.method === 'PUT') {
      const value = await request.text();
      await env.MY_KV.put(key, value);
      return new Response('Saved', { status: 201 });
    }

    return new Response('Method not allowed', { status: 405 });
  },
};

wrangler.toml

name = "my-worker"
main = "src/index.js"
compatibility_date = "2024-01-01"

[vars]
ENVIRONMENT = "production"

[[kv_namespaces]]
binding = "MY_KV"
id = "your-kv-namespace-id"

[triggers]
crons = ["0 * * * *"]

Deploy Worker

# Install Wrangler
npm install -g wrangler

# Login
wrangler login

# Deploy
wrangler deploy

# Tail logs
wrangler tail

Cloudflare Pages

# Deploy from CLI
wrangler pages deploy ./dist --project-name=my-project

# Create project
wrangler pages project create my-project

# List deployments
wrangler pages deployment list --project-name=my-project

Zero Trust Access

Application Access Policy

# Create access application
curl -X POST "https://api.cloudflare.com/client/v4/accounts/${CF_ACCOUNT_ID}/access/apps" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json" \
  --data '{
    "name": "Internal App",
    "domain": "app.example.com",
    "type": "self_hosted",
    "session_duration": "24h"
  }'

WAF Rules

# Create firewall rule
curl -X POST "https://api.cloudflare.com/client/v4/zones/${CF_ZONE_ID}/firewall/rules" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json" \
  --data '[{
    "filter": {
      "expression": "(ip.src ne 192.0.2.1)",
      "paused": false
    },
    "action": "block",
    "description": "Block all except allowed IP"
  }]'

Page Rules

# Create page rule for caching
curl -X POST "https://api.cloudflare.com/client/v4/zones/${CF_ZONE_ID}/pagerules" \
  -H "Authorization: Bearer ${CF_API_TOKEN}" \
  -H "Content-Type: application/json" \
  --data '{
    "targets": [{
      "target": "url",
      "constraint": {
        "operator": "matches",
        "value": "*example.com/static/*"
      }
    }],
    "actions": [{
      "id": "cache_level",
      "value": "cache_everything"
    }],
    "priority": 1,
    "status": "active"
  }'

Best Practices

1. Tunnels: Use tunnels instead of exposing ports directly
2. DNS: Enable proxied (orange cloud) for DDoS protection
3. Workers: Use Workers for edge logic and caching
4. Security: Enable Zero Trust for internal applications
5. SSL: Use Full (Strict) SSL mode

Common Workflows

Expose Local Service

1. Install cloudflared
2. Create tunnel: cloudflared tunnel create my-tunnel
3. Configure ingress in config.yml
4. Route DNS: cloudflared tunnel route dns my-tunnel app.example.com
5. Run tunnel: cloudflared tunnel run my-tunnel

Deploy Static Site

1. Build static site
2. Deploy with Wrangler: wrangler pages deploy ./dist
3. Configure custom domain in dashboard
4. Enable HTTPS