Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BTLS Certificate Expiry & Recommendations76 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- 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
BCDN & DeliveryCloudflareREVIEW
A+DNS Records2 A records, 7 ms lookupPASS
| A | 104.18.12.179, 104.18.13.179 |
| AAAA | 2606:4700::6812:db3, 2606:4700::6812:cb3 |
| CNAME | — |
| NS | dns42.cloudns.net, dns41.cloudns.net, dns44.cloudns.net, dns43.cloudns.net |
| MX | 5 karger-com.mail.protection.outlook.com |
| TXT | OsEg2PTFLtnuJJ4J4Vjyx2yt2oiYA3ehncKzzZ8DHuGlRJ92OZMx+TeLFtX+y3ljh9Vh1RaQTtalGsEo... digicert.com atlassian-domain-verification=7xhf977mUNoonSOV/EHPihTAW4XZDJJktUbpFAQwoyCihWrrGV... globalsign-domain-verification=A002658E94F596902743278A7DFC8D39 SPF v=spf1 include:_spf.karger_com._d.easydmarc.pro ~all lvyzvq214c102hv2vv3f4mbqghryc2g7 pardot925633=d4d8ec6e96692e248fba5e2dfe8be533e97f9f1fa9f8c2055634aed2f5588645 sending_domain925633=f5f17f89c01169b057de061d3da0a81dec0969feb77775f36e992678fe9... DBE49FAD-CD41-40C9-BD73-9D2CA43FF859 www.digicert.com QuoVadis=0a12298b-ff65-4e36-b6ec-b6ea364fd1d4 |
| CAA | Lookup not available with standard resolver |
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.
A+Redirect Chain0 redirect(s), 19 ms totalPASS
https://karger.com
19 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://karger.com | 403 | 19 ms | HTTP/1.1 | cloudflare |
A+IPv6 ReadinessIPv6 reachable (2 ms)PASS
ACrawlabilityrobots.txt present, no sitemapPASS
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
User-agent: 008
Disallow: /
User-agent: *
Disallow: /bin/
Disallow: /config/
Disallow: /app_data/
Disallow: /dlls/
Disallow: /App_Themes/
Disallow: /signin.aspx
Disallow: /searchresults.aspx
Disallow: /search-results
Disallow: /advancedsearch.aspx
Disallow: /advanced-search
Disallow: /DownloadFile/
Disallow: /downloadimage.aspx
Disallow: /Citation/Download
Disallow: /Shibboleth.sso/
Disallow: /SignInShibboleth.aspx
Disallow: /lookup/external-ref
Disallow: /user/logout
Disallow: /cgi/pmidlookup
Disallow: /Themes/Client/app/img/favicons/manifest.json
Disallow: /lookup/google-scholar
Disallow: /store/*
Allow: /cassette.axd/stylesheet/
Allow: /cassette.axd/script/
Allow: /cassette.axd/manifest.xml
Disallow: /*.axd
Disallow: /specificToClient1/
Sitemap: https://karger.com/data/sitemap/sitemap.xml
No sitemap found
Adding a sitemap helps search engines discover your pages.
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencekarger.com — via Inic GmbH, 29 years, 3 months oldPASS
693 days
June 11, 2028
76 days
Issued by Let's Encrypt
29 years, 3 months
Registered June 12, 1997
Not enabled
Protects against DNS spoofing
Unknown
2606:4700::6812:db3
Inic GmbH
Expiry timeline
Recommended actions
- 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