Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
CCrawlabilityActionrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
<!DOCTYPE html>
<html xmlns="https://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta charset="utf-8" />
<meta name="Author" content="Apple Inc." />
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
<link rel="shortcut icon" href="/favicon.ico" />
<link rel="icon" href="/favicon.ico" />
<link rel="mask-icon" href="/apple-logo.svg" color="#333333">
<link rel="stylesheet" href="/assets/styles/global.dist.css?51172657083" type="text/css" />
<link rel="stylesheet" href="/assets/styles/dark-mode.css?54232608030" type="text/css" media="(prefers-color-scheme: dark)" data-color-scheme="dark" />
<link rel="stylesheet" href="/assets/styles/localization.css?54232608030" type="text/css" />
<script src="/assets/scripts/lib/jquery/jquery-3.6.0.min.js?45232608030"></script>
<script src="/assets/scripts/settings.js?45232608030"></script>
<script src="/assets/scripts/language-locales.js?45232608030"></script>
<script src="/assets/scripts/DeveloperBreadcrumbs.js?45232608030"></script>
<script src="/assets/metrics/scripts/analytics-module.js?45232608030"></script>
<script async src="/assets/scripts/retinate.js?45232608030"></script>
<script src="/assets/scripts/global-logout.js?45232608030"></script>
<script async crossorigin src="https://sfss.cdn-apple.com/2.0.0-beta.2/sf-symbol.js?28172637106"></script>
<link rel="stylesheet" href="https://sf-saas.cdn-apple.com/2.4.0-beta.0/animations/all.css" type="text/css" />
<link rel="stylesheet" href="https://www.apple.com/wss/fonts?families=SF+Pro,v3|SF+Pro+Icons,v3">
<link rel="stylesheet" href="https://www.apple.com/wss/fonts?family=SF+Mono&v=2" type="text/css" />
<link rel="stylesheet" href="https://www.apple.com/wss/fonts?family=Apple+Icons&v=1" type="text/css" />
<title>iCloud - Apple Developer</title>
<meta name="omni_page" content="iCloud - (English)" />
<meta name="Description" content="Securely store your app’s data and documents in iCloud — and keep them up to date across macOS, iOS, watchOS, tvOS, and the web. With iCloud, your users can access the information they want, wherever they want it." />
<meta name="search_icon" content="/assets/elements/icons/icloud/icloud-96x96_2x.png">
<meta property="og:locale" content="en_US" />
<meta property="og:site_name" content="Apple Developer" />
<meta property="og:type" content="website" />
<meta property="og:image" content="https://developer.apple.com/news/images/og/icloud-og.jpg" />
<meta property="og:title" content="iCloud - Apple Developer" />
<meta property="og:description" content="Securely store your app’s data and documents in iCloud — and keep them up to date across macOS, iOS, watchOS, tvOS, and the web. With iCloud, your users can access the information they want, wherever they want it." />
<meta property="og:url" content="https://developer.apple.com/icloud/" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:image" content="https://developer.apple.com/news/images/og/icloud-og-twitter.jpg" />
<meta name="twitter:title" content="iCloud - Apple Developer" />
<meta name="twitter:description" content="Securely store your app’s data and documents in iCloud — and keep them up to date across macOS, iOS, watchOS, tvOS, and the web. With iCloud, your users can access the information they want, wherever they want it." />
<meta name="twitter:url" content="https://developer.apple.com/icloud/" />
<link rel="alternate" href="https://developer.apple.com/cn/icloud/" hreflang="zh-CN" />
<link rel="alternate" href="https://developer.apple.com/jp/icloud/" hreflang="ja-JP" />
<link rel="alternate" href="https://developer.apple.com/kr/icloud/" hreflang="ko-KR" />
<link rel="alternate" href="https://developer.apple.com/icloud/" hreflang="en" />
<link rel="canonical" href="https://developer.apple.com/icloud/" />
<link rel="stylesheet" href="/icloud/styles/icloud-common.css" type="text/css">
</head>
<body id="icloud-overview">
<script>
// Execute immediately to avoid UI flash
(function () {
// Prevent React dev mode from running this multiple times
if (window.__didRunColorThemeScript) {
return;
}
window.__didRunColorThemeScript = true;
const prefersDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
const body = document.body;
// If theme-dark or theme-light is already applied, do nothing and lock it
if (body.classList.contains("theme-dark") || body.classList.contains("theme-light")) {
// Set the data-color-scheme attribute based on the existing theme
body.setAttribute('data-color-scheme', body.classList.contains("theme-dark") ? "dark" : "light");
// Prevent future modifications
window.__disableColorScheme = true;
// Hide the color picker immediately
const style = document.createElement('style');
style.textContent = '.color-scheme-toggle { display: none !important; }';
document.head.appendChild(style);
return;
}
// Otherwise, set theme normally based on user settings or system preference
if (window.Settings && window.Settings.preferredColorScheme) {
const colorTheme = (window.Settings.preferredColorScheme === 'auto') && !prefersDark ? 'light'
: (window.Settings.preferredColorScheme === 'light') ? 'light' : 'dark';
body.setAttribute('data-color-scheme', colorTheme);
colorTheme === "dark" ? body.classList.add("theme-dark") : body.classList.add("theme-light");
} else {
const colorTheme = prefersDark ? 'dark' : 'light';
body.setAttribute('data-color-scheme', colorTheme);
prefersDark ? body.classList.add("theme-dark") : body.classList.add("theme-light");
}
})();
</script>
<link rel="stylesheet" href="/assets/styles/suggest-lang.css?54232608030" type="text/css" />
<div id="suggest-lang" class="ribbon hide" lang="en">
<div class="ribbon-content-wrapper">
<div class="ribbon-content row">
<div class="column large-12 large-centered">
<p><a href="#" id="suggest-link" class="ribbon-link more">View in English</a></p>
<button id="suggest-closer" class="icon icon-after icon-reset" aria-label="Dismiss language suggestion" tabindex="0"></button>
</div>
</div>
</div>
</div>
<script src="/assets/scripts/suggest-lang.js?03162626057"></script>
<link rel="stylesheet" href="/assets/styles/globalnav.css?48212635068" type="text/css" />
<nav id="globalnav" lang="en-US" dir="ltr" aria-label="Global" class="globalnav js" style="--r-globalnav-text-zoom-scale: 1;">
<div class="globalnav-content">
<div class="globalnav-item globalnav-menuback"><button aria-label="Main menu" class="globalnav-menuback-button"><span class="globalnav-chevron-icon"><svg height="48" viewBox="0 0 9 48" width="9" xmlns="http://www.w3.org/2000/svg">
<path d="m1.5618 24.0621 6.5581-6.4238c.2368-.2319.2407-.6118.0088-.8486-.2324-.2373-.6123-.2407-.8486-.0088l-7 6.8569c-.1157.1138-.1807.2695-.1802.4316.001.1621.0674.3174.1846.4297l7 6.7241c.1162.1118.2661.1675.4155.1675.1577 0 .3149-.062.4326-.1846.2295-.2388.2222-.6187-.0171-.8481z"></path>
</svg></span></button></div>
<ul id="globalnav-list" class="globalnav-list">
<li class="
globalnav-item
globalnav-item-apple
ac-gn-item
ac-gn-apple
">
<a href="/" aria-label="Apple Developer" class="globalnav-link globalnav-link-apple ac-gn-link ac-gn-link-apple-developer" id="ac-gn-firstfocus-small">
<span class="ac-gn-link-text globalnav-link-text">Apple Developer</span>
</a>
</li>
<li class="globalnav-item globalnav-menu">
<div class="globalnav-flyout" style="--r-globalnav-flyout-item-total: 0; --r-globalnav-flyout-group-number: 0;">
<div class="globalnav-menu-list" style="--r-globalnav-flyout-item-total: 7;">
<div class="
globalnav-item
globalnav-item-getting-started
globalnav-item-menu
globalnav-item-submenu
" style="--r-globalnav-flyout-item-number: 0;">
<ul class="globalnav-submenu-trigger-group">
<li class="globalnav-submenu-trigger-item">
<a href="/get-started/" data-topnav-flyout-trigger-compact="true" aria-label="Get Started" class="globalnav-link globalnav-submenu-trigger-link globalnav-link-getting-started">
<span class="globalnav-link-text-container">
<span class="globalnav-link-text">Get Started</span>
</span>
<span class="globalnav-link-chevron">
<svg height="48" viewBox="0 0 9 48" width="9" xmlns="http://www.w3.org/2000/svg">
<path d="m8.1155 30.358a.6.6 0 1 1 -.831.8653l-7-6.7242a.6.6 0 0 1 -.0045-.8613l7-6.8569a.6.6 0 1 1 .84.8574l-6.5582 6.4238z"></path>
</svg>
</span>
</a>
</li>
<li class="globalnav-submenu-trigger-item">
<button id="globalnav-menubutton-link-getting-started" class="globalnav-submenu-trigger-button" aria-expanded="false" aria-controls="globalnav-submenu-link-getting-started" aria-label="Get Started menu" data-topnav-flyout-trigger-regular="true">
<span class="globalnav-image-regular globalnav-submenu-button-icon">
<svg height="10" viewBox="0 0 10 10" width="10" xmlns="http://www.w3.org/2000/svg">
<path d="m4.6725 6.635-2.655-2.667a.445.445 0 0 1 -.123-.304.4331.4331 0 0 1 .427-.439h.006a.447.447 0 0 1 .316.135l2.357 2.365 2.356-2.365a.458.458 0 0 1 .316-.135.433.433 0 0 1 .433.433v.006a.4189.4189 0 0 1 -.123.3l-2.655 2.671a.4451.4451 0 0 1 -.327.14.464.464 0 0 1 -.328-.14z"></path>
</svg>
</span>
<span class="globalnav-image-compact globalnav-submenu-button-icon">
<svg height="48" viewBox="0 0 9 48" width="9" xmlns="http://www.w3.org/2000/svg">
<path d="m7.4382 24.0621-6.5581-6.4238c-.2368-.2319-.2407-.6118-.0088-.8486.2324-.2373.6123-.2407.8486-.0088l7 6.8569c.1157.1138.1807.2695.1802.4316-.001.1621-.0674.3174-.1846.4297l-7 6.7242c-.1162.1118-.2661.1675-.4155.1675-.1577 0-.3149-.062-.4326-.1846-.2295-.2388-.2222-.6187.0171-.8481l6.5537-6.2959z"></path>
</svg>
</span>
</button>
</li>
</ul>
<div id="globalnav-submenu-link-getting-started" class="globalnav-flyout globalnav-submenu" aria-labelledby="globalnav-menubutton-link-getting-started" style="--r-globalnav-flyout
BTLS Certificate Expiry & Recommendations62 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records1 A records, 26 ms lookupPASS
| A | 17.253.142.4 |
| AAAA | — |
| CNAME | — |
| NS | c.ns.apple.com, d.ns.apple.com, b.ns.apple.com, a.ns.apple.com |
| MX | 0 |
| TXT | SPF v=spf1 -all |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 363 ms totalPASS
https://icloud-content.com
324 ms · HTTP/1.1
https://developer.apple.com/icloud/
39 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://icloud-content.com | 301 | 324 ms | HTTP/1.1 | purple |
| 2 | https://developer.apple.com/icloud/ | 200 | 39 ms | HTTP/1.1 | Apple |
See the visual redirect chain in the HTTP Probe tab →
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceicloud-content.com — via Nom-iq Ltd. dba COM LAUDE, 11 years, 7 months old, hosted on APPLE-ENGINEERING - Apple Inc., USPASS
107 days
October 28, 2026
62 days
Issued by Apple Inc.
11 years, 7 months
Registered October 28, 2014
Not enabled
Protects against DNS spoofing
APPLE-ENGINEERING - Apple Inc., US
ASN AS714
17.253.142.4
Nom-iq Ltd. dba COM LAUDE
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice