Alex Morgan
Alex Morgan
Senior Hosting Analyst
10+ years testing web hosting infrastructure. Benchmarks servers across 4 continents.
虚拟主机

如何设置CDN 2026

A CDN (Content Delivery Network) serves your website assets from servers located close to each visitor worldwide, dramatically reducing load times for international audiences. Without a CDN, a visitor in Tokyo loading a site hosted in New York adds 150–200ms of latency to every asset. With a CDN, that same visitor loads assets from a nearby Tokyo edge node in under 10ms. This guide covers the fastest and easiest CDN setup: Cloudflare (free plan) on a WordPress site.

我们如何核对文中步骤

发布前，若步骤依赖主机商，我们会在至少两家平台各走一遍；否则在同一环境隔日执行两次。我们记录控制台报错、不同地区的界面文案差异，并在厂商调整按钮位置后立即更新文案。路径与截图每季度抽检。涉及 DNS、SSL 或付款时，我们确认回滚/补救选项，并链接到官方文档以获取权威表述。

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    Step 1: Create a free Cloudflare account

    Go to cloudflare.com and click "Sign Up". Enter your email and create a password. Click "Add a Site" on the dashboard, enter your domain name (without www or https), and select the Free plan. Cloudflare will scan your existing DNS records. review them to confirm they look correct.

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    Step 2: Update your domain's nameservers

    Cloudflare acts as a DNS proxy. all traffic routes through Cloudflare before reaching your server. To enable this, update your domain's nameservers at your domain registrar to the two Cloudflare nameservers it provides (e.g., ada.ns.cloudflare.com and liam.ns.cloudflare.com). Find this in your registrar's DNS/Nameserver settings. DNS propagation typically completes within 1–24 hours.

  3. 3

    Step 3: Enable caching in Cloudflare

    Once your domain is active on Cloudflare, go to Caching → Configuration. Set "Caching Level" to Standard. Set "Browser Cache TTL" to 4 hours (or longer for static assets you change infrequently). Enable "Always Use HTTPS" under SSL/TLS → Edge Certificates to ensure all traffic is encrypted. Cloudflare caches static assets automatically; dynamic pages (WordPress admin, checkout) are not cached by default.

  4. 4

    Step 4: Install the Cloudflare WordPress plugin

    In your WordPress dashboard, go to Plugins → Add New and search for "Cloudflare". Install and activate the official Cloudflare plugin. Connect it to your Cloudflare account using your email and a Cloudflare API Token (create one in your Cloudflare dashboard under Profile → API Tokens → Create Token → Edit Zone DNS). The plugin allows cache purging directly from WordPress.

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    Step 5: Configure Cloudflare performance settings

    In your Cloudflare dashboard → Speed: Enable Auto Minify for HTML, CSS, and JavaScript. Enable Rocket Loader (speeds up JavaScript delivery. test your site afterwards to confirm it doesn't break any interactive elements). Enable Early Hints if available on your plan. Under Images (if on a paid plan), enable Mirage for mobile image optimisation.

  6. 6

    Step 6: Set up Cloudflare firewall rules (optional but recommended)

    Cloudflare's free plan includes basic DDoS protection and a Web Application Firewall. In Security → WAF: enable the Cloudflare Managed Ruleset for WordPress (blocks known WordPress exploits). In Security → Bots: enable Bot Fight Mode to block automated scraping and brute force attacks. These settings add meaningful security with zero performance impact.

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    Step 7: Test and verify CDN is working

    Go to GTmetrix or WebPageTest and test your site from multiple geographic locations. Look for: CDN-served assets (shown in the waterfall as coming from a Cloudflare domain or CDN hostname), improved load times from distant locations (US site should now load faster in Europe/Asia), and green HTTPS padlock in browsers. Also check that your WordPress admin panel (/wp-admin/) still works correctly.

1
SiteGround Fastest
Revenue-critical sites are where SiteGround earns the premium: Google Cloud, SuperCacher, and support that actually reads the ticket before replying.
★★★★½
✓ 优点
  • SiteGround named when the dashboard flow matched what we checked on a live account.
  • High uptime, steady response times on their Google Cloud setup.
  • Staging and daily backups on every plan.
✕ 缺点
  • No free domain included.
  • Steep renewal prices. Check year-two cost before committing.
月价格$3.99
存储空间10 GB SSD
免费域名✕ 否
在线时间99.99%
9.8 /10
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阅读完整评测
2
Hostinger Top Pick
Hostinger has survived multiple yearly cycles on our bench: LiteSpeed, hPanel, and sub-$3 intro pricing still deliver the best overall value for most sites we migrate.
★★★★½
✓ 优点
  • Hostinger named when the dashboard flow matched what we checked on a live account.
  • Fast LiteSpeed loading, consistent in our repeated tests.
  • Good storage, SSL, and backups on entry plans, no forced add-ons at login.
✕ 缺点
  • No phone support on any plan.
  • Staging and extra backups may need a higher plan.
月价格$2.99
存储空间100 GB SSD
免费域名✓ 是
在线时间99.9%
9.9 /10
获取Hostinger优惠 →
阅读完整评测

常见问题

Is Cloudflare really free?+
Yes. Cloudflare's free plan includes CDN, DDoS protection, free SSL, DNS hosting, and basic WAF. It's one of the most generous free services in the web infrastructure space. Paid plans ($20/month+) add advanced firewall rules, image optimisation, and priority support.
Does a CDN replace hosting?+
No. A CDN accelerates content delivery by caching assets at edge locations, but your origin server (your web host) is still required to generate dynamic content (database queries, PHP processing). A CDN reduces the load on your host and improves speed for distant visitors.
Will a CDN break my WordPress site?+
Cloudflare is generally safe to enable and rarely breaks WordPress. The most common issue is stale cache after updating your site. easily fixed by purging cache in the Cloudflare dashboard or WordPress plugin. Rocket Loader occasionally breaks certain JavaScript-heavy themes; disable it if you notice issues.