Infrastructure report cardTop 1K site

yahoo.co.jp

75 out of 10015 passed5 to improve

Checked yesterday· Grading…

HTTPS & TLSA

Certificate, protocol, redirect, HSTS88

DNSB

Name servers, DNSSEC, CAA, registration79

EmailD

SPF, DMARC, MTA-STS, DKIM62

Web & networkD

Security headers, IPv6, RPKI50

DependenciesA⁺

How much hangs on one company100

HTTPS & TLS

88/100A

HSTS0/4
No HSTS: a visitor's first request can be downgraded to plain HTTP.
HTTPS certificateCybertrust Japan Co., Ltd.10/10
HTTPS with a valid certificate from Cybertrust Japan Co., Ltd..
Certificate expiry1304/4
The certificate is valid for another 130 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://.
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 servers44/4
4 name servers for the domain.
Name servers answer4/45/5
Every name server answers for the domain, with the same version of the zone.
CAA recordscybertrust.ne.jp, globalsign.com, digicert.com2/2
CAA records name the authorities allowed to issue its certificates.

Email

62/100D

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~all4/5
SPF lists the servers allowed to send its mail and marks the rest as suspicious (~all).
DMARCquarantine5/7
DMARC sends mail that fakes the domain to spam (p=quarantine).

Web & network

50/100D

IPv60/4
www.yahoo.co.jp 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 providersSelf-hosted5/5
DNS is served from 2 separate networks.
One company for everything5/5
The website, DNS and email do not all hang on one company.

Who runs it

Website: YAHOO-JPAP
DNS: Self-hosted
Email: Self-hosted

Routes

124.83.128.0/17AS24572RPKI valid

Name servers

ns01.yahoo.co.jpSelf-hostedAS23816
ns02.yahoo.co.jpSelf-hostedAS23816
ns11.yahoo.co.jpSelf-hostedAS24572
ns12.yahoo.co.jpSelf-hostedAS24572

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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