Infrastructure report cardTop 1M site

notion.so

78 out of 10017 passed7 to improve

Checked yesterday· Grading…

HTTPS & TLSA⁺

Certificate, protocol, redirect, HSTS100

DNSD

Name servers, DNSSEC, CAA, registration64

EmailC

SPF, DMARC, MTA-STS, DKIM69

Web & networkC

Security headers, IPv6, RPKI72

DependenciesB

How much hangs on one company80

HTTPS & TLS

100/100A⁺

HTTPS certificateGoogle Trust Services10/10
HTTPS with a valid certificate from Google Trust Services.
Certificate expiry884/4
The certificate is valid for another 88 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 strengthECDSA P-2562/2
A strong key: ECDSA P-256.
HTTP → HTTPS3013/3
http:// redirects straight to https://.
HSTS1 year · preload4/4
HSTS tells browsers to use HTTPS only, for 1 year.
HTTP/2 and HTTP/3HTTP/22/2
HTTP/2.

DNS

64/100D

DNSSEC0/3
Not signed with DNSSEC: a forged DNS answer for the domain cannot be told from the real one.
CAA records0/2
No CAA records: any certificate authority may issue certificates for the domain.
Name servers24/4
2 name servers for the domain.
Name servers answer2/25/5
Every name server answers for the domain, with the same version of the zone.

Email

69/100C

Null MX0/1
No MX records, and no null MX to say the domain takes no mail.
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

72/100C

X-Content-Type-Options0/2
No X-Content-Type-Options: browsers may run an upload as a script.
Framing0/2
Any site can show its pages in a frame, which enables clickjacking.
Permissions-Policy0/0.5
No Permissions-Policy: embedded content may ask for camera, microphone or location.
Content Security Policy3/3
A Content Security Policy limits which scripts the pages run.
Referrer-Policystrict-origin-when-cross-origin0.5/0.5
Referrer-Policy limits what other sites learn about where visitors came from.
IPv64/4
notion.so is reachable over IPv6 as well as IPv4.
RPKIvalid4/4
The route to the website is RPKI-valid: networks can reject hijacked announcements of it.

Dependencies

80/100B

DNS providersCloudflare3/5
All DNS is with one provider (Cloudflare): an outage there takes the domain offline, as Dyn's did in 2016.
One company for everything5/5
The website, DNS and email do not all hang on one company.

Who runs it

Website: NOTION
DNS: Cloudflare
Email: —

Routes

208.103.161.0/24AS33191RPKI valid
2602:f79a::/48AS33191RPKI valid

Name servers

dana.ns.cloudflare.comCloudflareAS13335
woz.ns.cloudflare.comCloudflareAS13335

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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