Infrastructure report cardTop 5K site

expedia.com

90 out of 10017 passed4 to improve

Checked 2 days ago· Grading…

HTTPS & TLSA⁺

Certificate, protocol, redirect, HSTS100

DNSD

Name servers, DNSSEC, CAA, registration64

EmailA

SPF, DMARC, MTA-STS, DKIM85

Web & networkA⁺

Security headers, IPv6, RPKI100

DependenciesA⁺

How much hangs on one company100

HTTPS & TLS

100/100A⁺

HTTPS certificateLet's Encrypt10/10
HTTPS with a valid certificate from Let's Encrypt.
Certificate expiry854/4
The certificate is valid for another 85 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://.
HSTS2 years4/4
HSTS tells browsers to use HTTPS only, for 2 years.
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 servers104/4
10 name servers for the domain.
Name servers answer8/85/5
Every name server answers for the domain, with the same version of the zone.

Email

85/100A

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.
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).
DKIMselector12/2
A DKIM key is published (selector selector1), so its mail can be signed.

Web & network

100/100A⁺

Security headers
The website answered 429 to the check (bot protection, most likely), so its headers are not graded.
IPv64/4
www.expedia.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

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: Akamai
DNS: NS1UltraDNS
Email: expediagroup.com

Routes

62.115.0.0/16AS1299RPKI valid
2001:2030::/28AS1299RPKI valid

Name servers

dns1.p09.nsone.netNS1AS62597
dns2.p09.nsone.netNS1AS62597
dns3.p09.nsone.netNS1AS62597
dns4.p09.nsone.netNS1AS62597
pdns1.ultradns.netUltraDNSAS12008
pdns2.ultradns.netUltraDNSAS12008
pdns3.ultradns.orgUltraDNSAS12008
pdns4.ultradns.orgUltraDNSAS12008

README badge

Show the grade in your README or docs; it updates when the domain is graded again.

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

Compare with…

Full lookup

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