Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.FIPv6 ReadinessActionIPv6 records exist but unreachableFIX
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.
Learn more ▾ ▴
Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.
Source: RFC 8305 (Happy Eyeballs)
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations191 days until leaf cert expires — 2 issues to addressREVIEW
Certificate validity
Recommended actions
- Submit your domain to hstspreload.org to be added to the Chrome preload list
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
BCDN & DeliveryAkamaiREVIEW
A+DNS Records1 A records, 18 ms lookupPASS
| A | 23.55.219.254 |
| AAAA | 2600:1406:3a00:680::447a, 2600:1406:3a00:691::447a |
| CNAME | — |
| NS | annalise.ns.cloudflare.com, bruce.ns.cloudflare.com |
| MX | — |
| TXT | SPF v=spf1 -all 8ab72acd4d5a42dcb191d093c06c64a3 _xq6rt7e8d0ywkcatxj69vx8ahrc4ugl |
| 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), 79 ms totalPASS
https://uscis.gov
48 ms · HTTP/1.1
https://www.uscis.gov/
30 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://uscis.gov | 301 | 48 ms | HTTP/1.1 | AkamaiGHost |
| 2 | https://www.uscis.gov/ | 200 | 30 ms | HTTP/1.1 | Apache |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 5 URLsPASS
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
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used: http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html
User-agent: *
Crawl-delay: 10
# Custom
Disallow: /sites/default/files/archive/
Disallow: /tools/reports-and-studies/h-1b-employer-data-hub
Disallow: /tools/reports-and-studies/h-1b-employer-data-hub/export
Disallow: /tools/reports-and-studies/h-1b-employer-data-hub/export-csv
Disallow: /es/herramientas/informes-y-estudios/centro-de-datos-de-empleadores-h-1b
Disallow: /es/tools/reports-and-studies/h-1b-employer-data-hub/export
Disallow: /es/tools/reports-and-studies/h-1b-employer-data-hub/export-csv
Disallow: /tools/reports-and-studies/h-2b-employer-data-hub
Disallow: /tools/reports-and-studies/h-2b-employer-data-hub/export
Disallow: /tools/reports-and-studies/h-2b-employer-data-hub/export-csv
Disallow: /es/herramientas/informes-y-estudios/centro-de-datos-de-empleadores-h-2b
Disallow: /es/tools/reports-and-studies/h-2b-employer-data-hub/export
Disallow: /es/tools/reports-and-studies/h-2b-employer-data-hub/export-csv
Disallow: /save/save-agency-search-tool
Disallow: /save/save-agency-search-tool/export
Disallow: /tools/civil-surgeons-by-region
Disallow: /tools/find-a-doctor/list/export
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
User-agent: PetalBot
Disallow: /
A+Domain Intelligenceuscis.gov — via get.gov, 22 years, 10 months old, hosted on AkamaiPASS
57 days
August 11, 2026
191 days
Issued by DigiCert Inc
22 years, 10 months
Registered October 2, 2003
Enabled
Protects against DNS spoofing
Akamai
ASN AS16625
23.55.219.254
get.gov
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- 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