B
Infrastructure report cardTop 5K site

bloomberg.com

82 out of 10016 passed4 to improve
Checked yesterday· Grading…
HTTPS & TLSA+
Certificate, protocol, redirect, HSTS100
DNSB
Name servers, DNSSEC, CAA, registration79
EmailB
SPF, DMARC, MTA-STS, DKIM83
Web & networkD
Security headers, IPv6, RPKI50
DependenciesA+
How much hangs on one company100

HTTPS & TLS

100/100A+
  • HTTPS certificateDigiCert Inc10/10

    HTTPS with a valid certificate from DigiCert Inc.

  • Certificate expiry1244/4

    The certificate is valid for another 124 days.

  • TLS versionTLS 1.34/4

    Negotiates TLS 1.3, the current protocol: faster handshakes, forward secrecy always.

  • Old protocols3/3

    Refuses the retired TLS 1.0 and 1.1.

  • Key strengthRSA 20482/2

    A strong key: RSA 2048.

  • HTTP → HTTPS3013/3

    http:// redirects straight to https://.

  • HSTS1 year4/4

    HSTS tells browsers to use HTTPS only, for 1 year.

  • HTTP/2 and HTTP/3HTTP/22/2

    HTTP/2.

DNS

79/100B
  • DNSSEC0/3

    Not signed with DNSSEC: a forged DNS answer for the domain cannot be told from the real one.

  • Name servers74/4

    7 name servers for the domain.

  • Name servers answer7/75/5

    Every name server answers for the domain, with the same version of the zone.

  • CAA recordsdigicert.com, amazon.com2/2

    CAA records name the authorities allowed to issue its certificates.

Email

83/100B
  • MTA-STS0/2

    No MTA-STS: mail to the domain can be read in transit by stripping its encryption.

  • TLS reporting0/0.5

    No TLS reporting: failed encrypted deliveries go unnoticed.

  • DKIM

    No DKIM key at the common selectors; it may use one that cannot be guessed.

  • SPF-all5/5

    SPF lists the servers allowed to send its mail and rejects the rest (-all).

  • DMARCreject7/7

    DMARC tells receivers to reject mail that fakes the domain (p=reject).

Web & network

50/100D
  • IPv60/4

    www.bloomberg.com has no IPv6 address: IPv6-only networks reach it only through translation.

  • Security headers

    The website answered 403 to the check (bot protection, most likely), so its headers are not graded.

  • RPKIvalid4/4

    The route to the website is RPKI-valid: networks can reject hijacked announcements of it.

Dependencies

100/100A+
  • DNS providersNS1, UltraDNS5/5

    DNS is served by 2 providers: one can fail without taking the domain offline.

  • One company for everything5/5

    The website, DNS and email do not all hang on one company.

Who runs it

Website
Fastly
DNS
NS1UltraDNS
Email
Self-hosted

Routes

  • 151.101.4.0/22AS54113RPKI valid

Name servers

  • dns1.p01.nsone.netAS62597
  • dns2.p01.nsone.netAS62597
  • dns3.p01.nsone.netAS62597
  • dns4.p01.nsone.netAS62597
  • pdns1.ultradns.netAS12008
  • pdns3.ultradns.orgAS12008
  • pdns5.ultradns.infoAS12008

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bloomberg.com: B
[![Infrastructure grade](https://skycisa.com/grade/bloomberg.com/badge.svg)](https://skycisa.com/grade/bloomberg.com)

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What is graded
HTTPS & TLS · 25%

A valid certificate (an invalid one means F), its expiry against its lifetime, TLS 1.3, no TLS 1.0/1.1 (else at most B), http:// sent straight to https://, HSTS, HTTP/2.

DNS · 20%

At least two name servers that all answer and agree, DNSSEC, CAA records, and a registration that is not about to expire.

Email · 20%

SPF, a DMARC policy that rejects forgeries (none means at most B), MTA-STS and TLS reporting for domains that take mail, DKIM at common selectors.

Web & network · 20%

Content Security Policy, nosniff, framing protection, Referrer- and Permissions-Policy, IPv6, and an RPKI-valid route (invalid means at most C).

Dependencies · 15%

DNS from more than one provider, and the website, DNS and email not all with one company.

A+ 95–100 · A 85–94 · B 75–84 · C 65–74 · D 50–64 · F below 50