# CloudFlare, WARP, WireGuard WARP is the VPN from Cloudflare, WireGuard is the engine of the VPN. WireGuard is build into Linux. On Ubuntu, just "sudo apt install wireguard" to do it. ──────────────────────────────────────────────────────────── > teach me more about cloudflare WARP, how to check if 1.1.1.1 is accessable from my position? ping or curl? ▾ Thought for 6s, 610 tokens Defining WARP's Core I'm focusing on defining Cloudflare WARP. It seems to be a fast, WireGuard-based VPN service. I need to now consider how to explain this in a way that resonates with an expert audience, emphasizing its key differentiators. ● Bash(ping -c 3 -W 3 1.1.1.1; echo "--- TCP 443 check ---"; curl -I -v --connect- timeout 4 https://1.1.1.1/ 2>&1 | head -n 20) ⎿ > Proxy-Connection: Keep-Alive > < HTTP/1.1 200 OK < Date: Sun, 26 Jul 2026 12:37:01 GMT < * CONNECT phase completed * CONNECT tunnel established, response 200 * ALPN: curl offers h2,http/1.1 } [5 bytes data] * TLSv1.3 (OUT), TLS handshake, Client hello (1): ● ManageTask(status a9707ed4-d99e-4c95-a59a-40fce32c4dff/task-165) ● Bash(curl --noproxy "*" -I -v --connect-timeout 4 https://1.1.1.1/ 2>&1 | head -n 15; echo "--- UDP / WARP endpoint check ---"; nc -zvw3 1.1.1.1 53 2>&1) ⎿ * CAfile: /etc/ssl/certs/ca-certificates.crt * CApath: /etc/ssl/certs { [5 bytes data] * TLSv1.3 (IN), TLS handshake, Server hello (2): { [1210 bytes data] * TLSv1.3 (IN), TLS change cipher, Change cipher spec (1): { [1 bytes data] * TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8): --- UDP / WARP endpoint check --- Connection to 1.1.1.1 53 port [tcp/domain] succeeded! (ctrl+o to collapse) ### 1. What is Cloudflare WARP? Cloudflare WARP is a fast, free VPN built on the WireGuard protocol. Instead of routing your traffic through traditional slow VPN servers, WARP routes your encrypted internet connection directly through Cloudflare’s global edge network (over 300+ data centers). • Core IP Endpoints: 1.1.1.1, 1.0.0.1, 162.159.192.1, 162.159.193.1. • WARP WireGuard Ports: UDP 2408, 500, or 4500. • DNS / DoH Ports: TCP/UDP 53, 443, or 853. ────── ### 2. ping vs curl: Which one should you use? Use curl (or nc), NOT ping. Here is why: Tool │ Protocol Tested │ Reliability for WARP / 1.… ──────────────────────┼────────────────────────────┼──────────────────────────── ping 1.1.1.1 │ ICMP (Network Layer) │ ❌ Unreliable. Many ISPs, │ │ routers, or firewalls │ │ block ICMP ping packets │ │ entirely, giving false │ │ 100% packet loss. curl https://1.1.1.1 │ TCP Port 443 + TLS │ ✅ Accurate. Tests if real │ (Application Layer) │ encrypted Web & TLS │ │ handshakes can actually │ │ reach Cloudflare. ────── ### 🧪 Live Test on Your Local System Right Now We just ran both tests directly on your laptop: 1. ping 1.1.1.1 Result: PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data. --- 1.1.1.1 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss 👉 Ping failed completely (dropped by network firewall/ICMP rules). 2. curl --noproxy "*" Result: * Trying 1.1.1.1:443... * TLSv1.3 (OUT), TLS handshake, Client hello * TLSv1.3 (IN), TLS handshake, Server hello Connection to 1.1.1.1 53 succeeded! 👉 curl succeeded! The TLS handshake completed and TCP port 443/53 is open and accessible from your position. ────── ### 3. How to check 1.1.1.1 & WARP from your position Run these 3 commands in your terminal to test different layers: #### Test 1: Direct HTTPS connection (Bypassing local proxy) curl --noproxy "*" -I --connect-timeout 4 https://1.1.1.1/ (If it returns HTTP/2 200 or SSL handshake completed, 1.1.1.1 HTTPS is open). #### Test 2: Test Cloudflare DNS over HTTPS (DoH) query curl --noproxy "*" -s "https://1.1.1.1/dns-query?name=google.com" -H "accept: application/dns-json" (If it returns JSON IP answers for google.com, Cloudflare DoH is working). #### Test 3: Test Cloudflare WARP WireGuard UDP endpoint nc -zuvw3 162.159.192.1 2408 *(Tests if WARP's WireGuard UDP port 2408 is reachable from your ISP). ──────────────────────────────────────────────────────────── > could we conclude that GFW not blocking all cloudflare traffics right now. what's the "*" in the `curl --noproxy "*" -I https://1.1.1.1/` ▾ Thought for 7s, 507 tokens Analyzing GFW Behavior I'm now investigating the user's first question: can we confidently say the GFW isn't blocking all Cloudflare traffic at this moment? I need to analyze the information thoroughly. I'm focusing on the implications of the GFW's current filtering mechanisms. I'm thinking of ways to use evidence to determine the truth. ### 1. Can we conclude that GFW is not blocking all Cloudflare traffic? Yes, absolutely. The GFW (Great Firewall) does not do a blanket block on all Cloudflare IP addresses (like 1.1.1.1 or 104.16.0.0/12). • Why? Millions of major websites worldwide (educational, open-source repos, international companies) use Cloudflare's CDN & DNS. Blocking all Cloudflare IPs would crash access to half the global internet for domestic users. • How GFW targets Cloudflare instead: 1. SNI Filtering (TLS Domain inspection): GFW inspects the domain name inside the TLS handshake. If the domain is blocked, GFW sends a TCP RST packet to kill the connection. 2. DNS Poisoning: Polluting standard UDP port 53 DNS responses. 3. WireGuard / WARP Protocol Throttling: Detecting and disrupting raw WireGuard handshake packets (UDP 2408) while leaving standard HTTPS (TCP 443) open. Because https://1.1.1.1 uses standard TLS 1.3 to a raw IP address without a blocked SNI domain, the connection goes straight through! ────── ### 2. What does "*" mean in curl --noproxy "*"? In Linux, when proxy software (like Happ, Xray, or Clash) is running, your terminal sets environment variables like: export http_proxy="http://127.0.0.1:9910" export https_proxy="http://127.0.0.1:9910" When you run curl, it automatically detects those variables and sends your request through your local proxy (127.0.0.1:9910) instead of your real ISP connection. • --noproxy : Tells curl to skip the proxy for specific addresses. • "*" (Wildcard): Matches ALL hostnames and IP addresses. So curl --noproxy "*" forces curl to ignore your local proxy settings and test a 100% direct connection from your local network card directly to 1.1.1.1. ──────────────────────────────────────────────────────────── > i suppose WARP is the VPN, but what's WireGuard? it's also the VPN client? ### 1. Simple Analogy: Engine vs. Car Think of it like this: • WireGuard is the Engine (the underlying VPN protocol technology). • 🚗 Cloudflare WARP is the Car (the consumer VPN service built on top of the WireGuard engine). ────── ### 2. What is WireGuard? WireGuard is a modern, extremely fast, and secure VPN Protocol & Kernel Technology. • Created as an open-source project to replace old, slow, complex VPN protocols like OpenVPN and IPsec. • Built directly into the Linux Kernel (Linux 5.6+). It has only ~4,000 lines of code (compared to OpenVPN's 100,000+ lines), making it extremely fast, battery- efficient, and secure. • How it works: You generate a pair of cryptographic keys (Public Key & Private Key) on your laptop and server to encrypt traffic over UDP. • Standalone Client: You can install the official wireguard / wg-quick client to build your own private VPN to your Hostinger VPS. ────── ### 3. What is Cloudflare WARP? Cloudflare WARP is a VPN Service & App run by Cloudflare. • Cloudflare took the open-source WireGuard protocol and used it as the transport layer for their worldwide network. • When you click "Connect" in the WARP app, it automatically registers a WireGuard key with Cloudflare and establishes a WireGuard connection to Cloudflare’s nearest data center. ────── ### 4. Comparison Table Feature │ WireGuard │ Cloudflare WARP ────────────────────┼─────────────────────────────┼───────────────────────────── What is it? │ Open-Source VPN Protocol │ Cloudflare's VPN Service & │ │ Product Server Requirement │ Requires a server (e.g., │ Cloudflare provides all │ your Hostinger VPS) │ servers worldwide Client App │ Official WireGuard App / │ Official WARP App (warp- │ wg-quick / Xray │ cli) / WARP configs Encryption Engine │ Native WireGuard (ChaCha20- │ Uses WireGuard protocol │ Poly1305) │ inside Primary Use Case │ Connecting securely to your │ Hiding your IP & routing │ own VPS / home network │ traffic through Cloudflare ────── ### 💡 How they connect to your Xray / Happ GUI: Because Cloudflare WARP uses the WireGuard protocol, Xray-core can generate a WARP WireGuard key and use WARP as an outbound proxy inside Xray or Happ GUI! ───────────────────────────────────────────────────────────────────────────────────── > ## wg ● Bash(which wg wg-quick warp-cli) (ctrl+o to expand) Here is a practical guide to mastering WireGuard and Cloudflare WARP on Linux! ────── ### 1. WireGuard (wg / wg-quick): Your Private Fast Tunnel WireGuard works by creating a virtual network interface (like wg0) on your laptop using cryptographic public/private keys. #### Key Commands & Workflow: 1. Generate a Keypair: # Generate private key and derive matching public key wg genkey | tee private.key | wg pubkey > public.key 2. Standard Config File (/etc/wireguard/wg0.conf): [Interface] PrivateKey = Address = 10.0.0.2/24 DNS = 1.1.1.1 [Peer] PublicKey = Endpoint = YOUR_VPS_IP:51820 AllowedIPs = 0.0.0.0/0, ::/0 PersistentKeepalive = 25 3. Start / Stop Tunnel: # Bring up wg0 network interface sudo wg-quick up wg0 # Check status and active handshake sudo wg # Bring down interface sudo wg-quick down wg0 ────── ### 2. Cloudflare WARP (warp-cli): The Free Global Network If you install the official Cloudflare WARP package on Linux, it provides the warp-cli tool. #### Essential warp-cli Commands: 1. Register device: warp-cli registration new 2. Set Mode: • Full Tunnel Mode (Routes all system traffic): warp-cli mode warp warp-cli connect • Local SOCKS5 Proxy Mode (Run WARP on a local port like 127.0.0.1:4001 without overriding your main system routing): warp-cli mode proxy warp-cli connect 3. Check Connection Status: warp-cli status curl --proxy socks5://127.0.0.1:4001 https://www.cloudflare.com/cdn-cgi/trace (If output shows warp=on, you're connected to Cloudflare!) ────── ### 3. The Ultimate Combo: Xray + Cloudflare WARP Relay In anti-censorship networking, a popular setup is chaining Xray VPS + Cloudflare WARP: [Your Laptop] ──(VLESS + REALITY)──▶ [Hostinger VPS] ──(WireGuard / WARP)──▶ [Target Web / Google / OpenAI] #### Why combine them? 1. GFW Bypass: The connection between your laptop and your VPS uses VLESS + REALITY to bypass GFW censorship. 2. IP Reputation & CAPTCHA Bypass: Traffic exiting your Hostinger VPS passes through Cloudflare WARP, so websites see a clean Cloudflare IP. This eliminates Google CAPTCHAs and prevents OpenAI/ChatGPT from blocking your VPS IP address! ──────────────────────────────────────────────── ## 2136pm ──────────────────────────────────────────────────────────── > to use warp-cli, i need not to setup wg, and the wg0, right? Correct! You do not need to set up wg or write any /etc/wireguard/wg0.conf files to use warp-cli. ────── ### Why? • warp-cli works with Cloudflare's background service (warp-svc). • It automatically handles device registration, key generation, server endpoints, and tunnel creation for you behind the scenes. All you need to do is run: # 1. One-time registration warp-cli registration new # 2. Connect! warp-cli connect You only manually configure wg or wg0.conf if you are connecting to your own private VPS server or configuring Xray outbounds directly. ───────────────────────────────────────────────────────────────────────────────────── >