Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from Madrid, Spain

308 Permanent Redirect

Checks

4 PASS 4 REVIEW

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

Crawlability

Action

robots.txt present, sitemap with 0 URLs

REVIEW

robots.txt present, sitemap with 0 URLs

robots.txt is present

Got: 10240 bytes

sitemap.xml is present

sitemap.xml contains invalid XML

Search engines may not be able to parse the sitemap. Fix XML validation errors.

sitemap.xml is empty — no URLs found

An empty sitemap provides no value. Add <url> entries for your pages.

robots.txt does not reference a sitemap

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

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.

Why this matters

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.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK

Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed

<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><title>Terraform | HashiCorp Developer</title><meta http-equiv="x-ua-compatible" content="ie=edge"/><meta property="og:locale" content="en_US"/><meta property="og:type" content="website"/><meta property="article:publisher" content="https://www.facebook.com/HashiCorp/"/><meta name="twitter:site" content="@HashiCorp"/><meta name="twitter:card" content="summary_large_image"/><meta name="theme-color" content="#000"/><meta name="description" property="og:description" content="Explore Terraform product documentation, tutorials, and examples."/><meta name="twitter:description" content="Explore Terraform product documentation, tutorials, and examples."/><meta property="og:site_name" content="Terraform | HashiCorp Developer"/><meta property="og:title" content="Terraform | HashiCorp Developer"/><meta property="og:image" content="https://developer.hashicorp.com/og-image/terraform.jpg"/><link rel="canonical" href="https://developer.hashicorp.com/terraform"/><link rel="icon" href="/favicon.ico" sizes="48x48"/><link rel="icon" href="/favicon.svg" sizes="any" type="image/svg+xml"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="google-site-verification" content="zRQZqfAsOX-ypXfU0mzAIzb5rUvj5fA4Zw2jWJRN-JI"/><meta name="ahrefs-site-verification" content="9d739b21c466a84dae91df1c79396081a9072152e64f765c9390fed6f249fb84"/><meta name="zd-site-verification" content="xnvnvv1i0wl4tf0pzaymb" data-product="hcp"/><meta name="zd-site-verification" content="36fp2i1pj67d8cjtzf4fi9" data-product="terraform"/><meta name="zd-site-verification" content="nbe87kfyp1sck7b13vj1i" data-product="packer"/><meta name="zd-site-verification" content="wvsmmqa1cfb9am9zlwfj" data-product="consul"/><meta name="zd-site-verification" content="cw22oopfwr68ujj0n5pn9i" data-product="boundary"/><meta name="zd-site-verification" content="lkslvganwfgfqfwpdeicgh" data-product="vault"/><meta 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sitemap.xml 200 OK

Type URL Set URLs 0 entries Valid XML No

TLS Certificate Expiry & Recommendations

38 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

days left

0d 30d 60d 90d+

Recommended actions

Add includeSubDomains to the HSTS directive
Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
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

CDN & Delivery

Vercel

REVIEW

Vercel

Site is served via Vercel CDN

Got: x-vercel-id: cdg1::p5njb-1775593660890-4d5aacf67654

CDN Detected: Vercel

Provider Vercel Evidence x-vercel-id: cdg1::p5njb-1775593660890-4d5aacf67654

DNS Records

2 A records, 22 ms lookup

PASS

2 A records, 22 ms lookup

Resolves to 2 IPv4 address(es)

Got: 66.33.60.66, 76.76.21.142

No IPv6 (AAAA) records

CNAME record at zone apex

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Got: cname.vercel-dns.com

4 nameserver(s) configured

Got: ns1.vercel-dns-3.com, ns3.vercel-dns-3.com, ns4.vercel-dns-3.com, ns2.vercel-dns-3.com

No MX records — email not configured via DNS

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

No SPF record found in TXT records

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

DNS resolution time: 22 ms

Got: 22 ms

A	66.33.60.66, 76.76.21.142
AAAA	—
CNAME	cname.vercel-dns.com
NS	ns1.vercel-dns-3.com, ns3.vercel-dns-3.com, ns4.vercel-dns-3.com, ns2.vercel-dns-3.com
MX	—
TXT	—
CAA	Lookup not available with standard resolver

Resolved in 22 ms

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

Redirect Chain

1 redirect(s), 271 ms total

PASS

1 redirect(s), 271 ms total

Single redirect

Got: https://www.terraform.io → https://developer.hashicorp.com/terraform (308)

WWW normalization redirect

Cross-domain redirect detected

https://www.terraform.io

95 ms · HTTP/1.1

308

https://developer.hashicorp.com/terrafor...

176 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://www.terraform.io	308	95 ms	HTTP/1.1	Vercel
2	https://developer.hashicorp.com/terrafor...	200	176 ms	HTTP/1.1	Vercel

See the visual redirect chain in the HTTP Probe tab →

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

HTTP→HTTPS redirect uses 302 instead of 301

Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.terraform.io/

308https://terraform.io/

HTTP → HTTPS

308http://www.terraform.io/ → https://www.terraform.io/

Use 301 (permanent) instead of 302 (temporary)

A+

HTTP Probe Timing

Total 155 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

39 ms

TCP Connect

1 ms

TLS Handshake

39 ms

Time to First Byte

155 ms

Total Time

155 ms

Connection waterfall

DNS Lookup 39 ms TCP Connect 1 ms TLS Handshake 39 ms Server Processing 75 ms Content Transfer 0 ms

Domain Intelligence

Domain intelligence data not available

INFO

Domain intelligence data not available

RDAP and WHOIS lookup both failed

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.