Infrastructure report cardTop 50K site

ox.ac.uk

73 out of 10015 passed6 to improve

Checked 2 days ago· Grading…

HTTPS & TLSB

Certificate, protocol, redirect, HSTS84

DNSD

Name servers, DNSSEC, CAA, registration64

EmailC

SPF, DMARC, MTA-STS, DKIM70

Web & networkD

Security headers, IPv6, RPKI50

DependenciesA⁺

How much hangs on one company100

HTTPS & TLS

84/100B

Old protocolsTLS 1.10/3
Still accepts TLS 1.1, retired by browsers in 2020 and open to downgrade attacks.
HSTS30 days2/4
HSTS is on, but only for 30 days.
HTTPS certificateGoogle Trust Services10/10
HTTPS with a valid certificate from Google Trust Services.
Certificate expiry304/4
The certificate is valid for another 30 days.
TLS versionTLS 1.34/4
Negotiates TLS 1.3, the current protocol: faster handshakes, forward secrecy always.
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

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 servers64/4
6 name servers for the domain.
Name servers answer6/65/5
Every name server answers for the domain, with the same version of the zone.

Email

70/100C

MTA-STS0/2
No MTA-STS: mail to the domain can be read in transit by stripping its encryption.
SPFredirect4/5
SPF follows another domain's policy (redirect=).
DMARCquarantine5/7
DMARC sends mail that fakes the domain to spam (p=quarantine).
TLS reporting0.5/0.5
TLS reporting: senders report failed encrypted deliveries.
DKIMselector12/2
A DKIM key is published (selector selector1), so its mail can be signed.

Web & network

50/100D

IPv60/4
www.ox.ac.uk 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 4 separate networks.
One company for everything5/5
The website, DNS and email do not all hang on one company.

Who runs it

Website: Cloudflare
DNS: Self-hosted
Email: Trend Micro Email Security

Routes

172.66.160.0/20AS13335RPKI valid

Name servers

auth4.dns.ox.ac.ukSelf-hostedAS63949
auth5.dns.ox.ac.ukSelf-hostedAS44684
auth6.dns.ox.ac.ukSelf-hostedAS196752
dns0.ox.ac.ukSelf-hostedAS786
dns1.ox.ac.ukSelf-hostedAS786
dns2.ox.ac.ukSelf-hostedAS786

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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