xbox.com
HTTPS & TLS
94/100A- HSTS126 days2/4
HSTS is on, but only for 126 days.
- HTTPS certificateMicrosoft Corporation10/10
HTTPS with a valid certificate from Microsoft Corporation.
- Certificate expiry1754/4
The certificate is valid for another 175 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://.
- HTTP/2 and HTTP/3HTTP/32/2
HTTP/2 and HTTP/3.
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 records2/2
CAA records name the authorities allowed to issue its certificates.
- SPF41/5
SPF needs 4 DNS lookups (at most 10 are allowed), so it fails at receivers.
Flatten includes you no longer use, or replace them with ip4:/ip6: ranges.
- 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.
- DMARCreject7/7
DMARC tells receivers to reject mail that fakes the domain (p=reject).
- DKIMselector12/2
A DKIM key is published (selector selector1), so its mail can be signed.
Web & network
75/100B- Content Security Policy0/3
No Content Security Policy: an injected script runs with the page's full rights.
- Referrer-Policy0/0.5
No Referrer-Policy of its own (browsers' default applies).
- Permissions-Policy0/0.5
No Permissions-Policy: embedded content may ask for camera, microphone or location.
- X-Content-Type-Options2/2
X-Content-Type-Options: nosniff stops browsers guessing file types.
- Framing2/2
Other sites cannot frame its pages (clickjacking protection).
- IPv64/4
www.xbox.com 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
60/100D- DNS providersAzure DNS3/5
All DNS is with one provider (Azure DNS): an outage there takes the domain offline, as Dyn's did in 2016.
- One company for everythingAzure DNS: DNS, email3/5
Azure DNS runs both the DNS and the email: one outage there takes both down.
Who runs it
- Website
- Akamai
- DNS
- Azure DNS
- Microsoft 365
Routes
- 104.103.64.0/22AS1299RPKI valid
- 2a02:26f0:3780::/48AS20940RPKI valid
Name servers
- ns1-205.azure-dns.comAzure DNSAS8075
- ns2-205.azure-dns.netAzure DNSAS8075
- ns3-205.azure-dns.orgAzure DNSAS8075
- ns4-205.azure-dns.infoAzure DNSAS8075
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What is graded
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.
At least two name servers that all answer and agree, DNSSEC, CAA records, and a registration that is not about to expire.
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.
Content Security Policy, nosniff, framing protection, Referrer- and Permissions-Policy, IPv6, and an RPKI-valid route (invalid means at most C).
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