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.
CDNS RecordsAction1 A records, 418 ms lookupREVIEW
| A | 192.0.66.110 |
| AAAA | 2a04:fa87:fffd::c000:426e |
| CNAME | heroku.go-vip.net |
| NS | — |
| MX | — |
| TXT | — |
| 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 CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
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.
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'.
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)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.
Source: DNS performance benchmarks
BTLS Certificate Expiry & Recommendations59 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
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
A+Redirect ChainNo redirects — direct accessPASS
https://www.heroku.com
148 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://www.heroku.com | 200 | 148 ms | HTTP/1.1 | nginx |
A+IPv6 ReadinessIPv6 reachable (180 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 8 URLsPASS
User-agent: *
Disallow: /readme.html
Disallow: /wp-admin/
Disallow: /wp-content/themes/orbitmedia-elementor/html/
# START YOAST BLOCK
# ---------------------------
User-agent: *
Disallow: /wp-json/
Disallow: /?rest_route=
Sitemap: https://www.heroku.com/sitemap_index.xml
# ---------------------------
# END YOAST BLOCK
- https://www.heroku.com/post-sitemap.xml
- https://www.heroku.com/page-sitemap.xml
- https://www.heroku.com/heroku-art-sitema...
- https://www.heroku.com/heroku_customers-...
- https://www.heroku.com/heroku_event-site...
- https://www.heroku.com/podcast-sitemap.x...
- https://www.heroku.com/category-sitemap....
- https://www.heroku.com/author-sitemap.xm...
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: www
HTTP → HTTPS
Consistent
A+Domain Intelligenceheroku.com — via MarkMonitor Inc., 19 years oldPASS
338 days
June 15, 2027
59 days
Issued by Let's Encrypt
19 years
Registered June 15, 2007
Not enabled
Protects against DNS spoofing
Unknown
2a04:fa87:fffd::c000:426e
MarkMonitor Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
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