Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.BTLS Certificate Expiry & Recommendations72 days until leaf cert expires — 5 issues to addressREVIEW
Certificate validity
Recommended actions
- Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
- 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+DNS Records2 A records, 47 ms lookupPASS
| A | 172.64.148.53, 104.18.39.203 |
| AAAA | 2a06:98c1:3105::6812:27cb, 2a06:98c1:3103::ac40:9435 |
| CNAME | — |
| NS | daisy.ns.cloudflare.com, logan.ns.cloudflare.com |
| MX | 10 us-smtp-inbound-1.mimecast.com 20 us-smtp-inbound-2.mimecast.com |
| TXT | google-site-verification=gyJSZNBHg1t0RPk2VJG76E3ZjxpT-H3gsowsyN5JoqE MS=ms80673274 0ed1fe018a92791a0082a34c44a6b7a46ae924ff24 google-site-verification=GX_AqkC_uUrShEF_5g1ZDFKq29WgLSMuvW6bnciOSz0 SPF v=spf1 mx ip4:35.190.247.0/24 include:emin-spf.peerj.com include:dmin-spf.peerj.... yandex-verification: 03e534a1ce985c89 MS=0799B2FF5417809458C47714F490D0A24DC994B6 dropbox-domain-verification=acht35g3lt8j Sendinblue-code:07ceb5001fe9181c3c42ebec5154a779 _globalsign-domain-verification=ZJwF5bPmVIwVGPvLaYi-GflAOROdB74UcXDqMmaNZo google-site-verification=Yu7Bt2eaZuS_4UHcuCeI-0gW-2As9hA-b28yGV5SY_g |
| 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 ChainNo redirects — direct accessPASS
https://peerj.com
478 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://peerj.com | 200 | 478 ms | HTTP/1.1 | cloudflare |
A+IPv6 ReadinessIPv6 reachable (17 ms)PASS
A+Crawlabilityrobots.txt present, sitemap with 2 URLsPASS
User-agent: *
Disallow: /ops/
Disallow: /reviewer-match/*/
Disallow: /errors/
Crawl-delay: 2
User-agent: Turnitin
Disallow: /institutions/*/
Crawl-delay: 10
User-agent: 007ac9
Disallow: /
Crawl-delay: 5
Sitemap: https://peerj.com/sitemap_index.xml
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencepeerj.com — via Amazon Registrar, Inc., 14 years, 4 months oldPASS
614 days
February 17, 2028
72 days
Issued by Google Trust Services
14 years, 4 months
Registered February 17, 2012
Not enabled
Protects against DNS spoofing
Unknown
2a06:98c1:3105::6812:27cb
Amazon Registrar, Inc.
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