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.
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations72 days until leaf cert expires — 2 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records1 A records, 113 ms lookupPASS
| A | 217.196.149.50 |
| AAAA | 2a02:16a8:dc51::50 |
| CNAME | — |
| NS | ns1.postgresql.org, ns2.postgresql.org, ns3.postgresql.org, ns4.postgresql.org |
| MX | 10 makus.postgresql.org 10 magus.postgresql.org |
| TXT | libera-BVY4G2rs94vmQBA94rNesqCh SPF v=spf1 include:_spf.postgresql.org ~all google-site-verification=aJB1lOnlG5TA0HgpZU-iKIQD6qPMWqUnkzanzern8eU |
| 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), 196 ms totalPASS
https://postgresql.org
90 ms · HTTP/1.1
https://www.postgresql.org/
106 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://postgresql.org | 301 | 90 ms | HTTP/1.1 | Varnish |
| 2 | https://www.postgresql.org/ | 200 | 106 ms | HTTP/1.1 | nginx |
See the visual redirect chain in the HTTP Probe tab →
A+IPv6 ReadinessIPv6 reachable (17 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 28359 URLsPASS
User-agent: *
Disallow: /admin/
Disallow: /account/
Disallow: /docs/devel/
Disallow: /list/
Disallow: /search/
Disallow: /message-id/raw/
Disallow: /message-id/flat/
Disallow: /message-id/resend/
Disallow: /message-id/mbox/
Sitemap: https://www.postgresql.org/sitemap.xml
A+Domain Intelligencepostgresql.org — via Gandi SAS, 29 years, 11 months oldPASS
1194 days
October 21, 2029
72 days
Issued by Let's Encrypt
29 years, 11 months
Registered October 22, 1996
Enabled
Protects against DNS spoofing
Unknown
2a02:16a8:dc51::50
Gandi SAS
Expiry timeline
Recommended actions
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
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