Infrastructure
· 14 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.
BDNSSECUnsigned (DNSSEC not deployed)REVIEW
BCAA RecordsNo CAA records (any CA may issue certificates)REVIEW
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 class="ls-main">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Is my site using HTTP3? Check HTTP3 service on any URL. Test QUIC service, too.">
<title>HTTP/3 Check</title>
<!-- UIkit CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.0.3/css/uikit.min.css" />
<!-- UIkit JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.0.3/js/uikit.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/uikit/3.0.3/js/uikit-icons.min.js"></script>
<link href="https://fonts.googleapis.com/css?family=Quicksand:400" rel="stylesheet">
<link rel="stylesheet" href="/static/style.css">
<link rel="icon" type="image/png" href="/static/favicon-32x32.png" />
<!-- Google Tag Manager -->
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-T8Z9663');</script>
<!-- End Google Tag Manager -->
</head>
<body class="ls-body">
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-T8Z9663"
height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- End Google Tag Manager (noscript) -->
<div class="uk-container">
<div class="uk-align-center" style="margin-bottom:70px;">
<div class="uk-margin-auto uk-margin-large-top uk-grid-small" uk-grid>
<div class="uk-width-1-1" style="padding:0;">
<div class="uk-width-1-1 uk-width-1-2@s uk-width-2-5@m uk-margin-auto">
<a href="/">
<div class="ls-http3check-logo uk-align-center" style="margin-bottom: 0px;"></div>
</a>
</div>
</div>
<div class="uk-width-1-1 uk-container" style="margin-top:0px;">
<div class="uk-width-1-1 uk-width-1-2@s uk-width-2-5@m uk-margin-auto">
<a href="https://www.litespeedtech.com/" target='_blank'>
<div class="uk-text-center uk-text-small uk-text-muted uk-margin-medium-left">
<span uk-icon="icon:bolt; ratio:.75" class="uk-text-warning"></span>Powered By LiteSpeed
</div>
</a>
</div>
</div>
</div>
<div class="uk-margin-auto uk-margin-top uk-width-expand uk-width-3-4@s uk-width-2-3@m uk-position-relative">
<ul class="uk-flex-center@s" uk-tab="connect:.switcher-main;animation:uk-animation-fade;duration:125;">
<li><a href="#"><small>Standard</small></a></li>
<li><a href="#"><small>Advanced</small></a></li>
</ul>
<div class="uk-position-top-right uk-margin-top-small ls-about">
<a class="ls-about-link uk-link-muted" href="/about"><small>About</small></a>
</div>
<div class="uk-switcher switcher-main">
<div>
<div class="uk-padding-small uk-border-rounded uk-box-shadow">
<form id="standard-form" method="get" class="uk-search uk-search-navbar uk-width-1 uk-flex" style="padding-left:10px;">
<input class="uk-search-input" type="search" name="host" placeholder="Hostname" autofocus>
</form>
</div>
<div class="uk-padding-small">
<div class="uk-margin-auto" uk-grid>
<button class="uk-margin-auto uk-width-4-5 uk-width-3-5@s uk-width-2-5@m uk-button uk-button-primary uk-border-rounded" type="submit" form="standard-form">Check</button>
</div>
</div>
<h3 class="uk-heading-line uk-text-center uk-margin-medium-top"><span>Popular Searches</span></h3>
<div class="uk-padding-small uk-child-width-1-2@s uk-text-center uk-grid-small" uk-grid>
<div>
<a class="ls-suggestion-link" href="/?host=www.facebook.com">
<div class="ls-suggestion ls-suggestion-2 uk-card uk-card-body uk-card-small" style="padding:20px 10px;">www.facebook.com</div>
</a>
</div>
<div>
<a class="ls-suggestion-link" href="/?host=www.litespeedtech.com">
<div class="ls-suggestion ls-suggestion-2 uk-card uk-card-body uk-card-small">www.litespeedtech.com</div>
</a>
</div>
<div>
<a class="ls-suggestion-link" href="/?host=www.http3check.net">
<div class="ls-suggestion ls-suggestion-5 uk-card uk-card-body uk-card-small">www.http3check.net</div>
</a>
</div>
<div>
<a class="ls-suggestion-link" href="/?host=www.google.com">
<div class="ls-suggestion ls-suggestion-7 uk-card uk-card-body uk-card-small">www.google.com</div>
</a>
</div>
</div>
</div>
<div class="uk-padding uk-border-rounded uk-box-shadow-small" style="padding-top: 25px;">
<p class="uk-text-center uk-text-small">Use Advanced Search to bypass hostname resolution and use a custom IP address or port.</p>
<form method="get" class=" uk-grid-small uk-align-center" uk-grid>
<div class="uk-width-1-1">
<div class="uk-grid-small" uk-grid>
<div class="uk-width-extend uk-width-1-6@s">
<div class="uk-form-label">Address</div>
</div>
<div class="uk-width-extend uk-width-1-2@m">
<input class="uk-input uk-border-rounded" type="text" name="ip" placeholder="IP Address">
</div>
<div class="uk-width-extend uk-width-1-5@m">
<input class="uk-input uk-border-rounded valid-input" type="text" name="port" value="443" placeholder="Port">
</div>
</div>
</div>
<div class="uk-width-1-1">
<div class="uk-form-controls uk-grid-small" uk-grid>
<div class="uk-width-extend uk-width-1-6@s">
<div class="uk-form-label">Host</div>
</div>
<div class="uk-width-extend uk-width-1-2@m">
<input class="uk-input uk-border-rounded" type="text" name="host" placeholder="Hostname" required>
</div>
<div class="uk-width-extend uk-width-1-4@m">
<button class="uk-width-extend uk-button uk-button-primary uk-border-rounded" type="submit">Check</button>
</div>
</div>
</div>
<input type="text" name="advanced" value="true" hidden>
</form>
</div>
</div>
</div>
</div>
<div class="ls-footer uk-box-shadow-small" uk-grid>
<div class="uk-width-1-1">
<div class="uk-width-extend uk-width-1-2@s uk-margin-auto">
<p>
Copyright © 2019 - <script>document.write(new Date().getFullYear())</script> <a href="https://www.litespeedtech.com/" target="_blank">LiteSpeed Technologies Inc</a><br>
All Rights Reserved. (<a href="https://www.litespeedtech.com/company/privacy-policy" target="_blank">Privacy Policy</a>)
</p>
</div>
</div>
</div>
</div>
</body>
</html>
CURL VariantsActionwww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
CTLS Certificate Expiry & RecommendationsAction20 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Renew certificate — 20 days remaining
- 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, 11 ms lookupPASS
| A | 208.167.245.252 |
| AAAA | — |
| CNAME | — |
| NS | evan.ns.cloudflare.com, mona.ns.cloudflare.com |
| MX | 10 eforward3.registrar-servers.com 10 eforward2.registrar-servers.com 10 eforward1.registrar-servers.com 15 eforward4.registrar-servers.com 20 eforward5.registrar-servers.com |
| TXT | SPF v=spf1 include:spf.efwd.registrar-servers.com -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
A+Subdomain TakeoverNo subdomain takeover risk detectedPASS
A+Reverse DNS1/1 IPs match cert SANPASS
A+Multi-Resolver DNS SpeedMean 20ms across 3 resolvers (spread 37ms)PASS
A+Redirect ChainNo redirects — direct accessPASS
https://http3check.net
20 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://http3check.net | 200 | 20 ms | HTTP/1.1 | LiteSpeed |
A+Domain Intelligencehttp3check.net — via NameCheap, Inc., 7 years, 2 months old, hosted on VultrPASS
302 days
March 15, 2027
20 days
Issued by Let's Encrypt
7 years, 2 months
Registered March 15, 2019
Not enabled
Protects against DNS spoofing
Vultr
ASN AS20473
208.167.245.252
NameCheap, Inc.
Expiry timeline
Recommended actions
- Renew the TLS certificate or verify auto-renewal is working
- 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