Infrastructure report cardTop 5K site

perplexity.ai

78 out of 10015 passed6 to improve

Checked 2 days ago· Grading…

HTTPS & TLSA⁺

Certificate, protocol, redirect, HSTS100

DNSB

Name servers, DNSSEC, CAA, registration79

EmailB

SPF, DMARC, MTA-STS, DKIM79

Web & networkD

Security headers, IPv6, RPKI63

DependenciesD

How much hangs on one company60

HTTPS & TLS

100/100A⁺

HTTPS certificateLet's Encrypt10/10
HTTPS with a valid certificate from Let's Encrypt.
Certificate expiry894/4
The certificate is valid for another 89 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/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 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.
CAA recordscomodoca.com, digicert.com, godaddy.com, letsencrypt.org, pki.goog, sectigo.com, ssl.com, amazon.com2/2
CAA records name the authorities allowed to issue its certificates.

Email

79/100B

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~all4/5
SPF lists the servers allowed to send its mail and marks the rest as suspicious (~all).
DMARCreject7/7
DMARC tells receivers to reject mail that fakes the domain (p=reject).
DKIMgoogle2/2
A DKIM key is published (selector google), so its mail can be signed.

Web & network

63/100D

RPKIunknown1/4
The route to the website is not covered by RPKI, so a hijack of it cannot be told apart.
Security headers
The website answered 403 to the check (bot protection, most likely), so its headers are not graded.
IPv64/4
www.perplexity.ai is reachable over IPv6 as well as IPv4.

Dependencies

60/100D

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 everythingCloudflare: website, DNS3/5
Cloudflare runs both the website and the DNS: one outage there takes both down.

Who runs it

Website: Cloudflare
DNS: Cloudflare
Email: Google Workspace

Routes

8.47.69.0/24AS13335RPKI unknown
2a06:98c1:3122::/48AS13335RPKI valid

Name servers

emerson.ns.cloudflare.comCloudflareAS13335
jessica.ns.cloudflare.comCloudflareAS13335

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Full lookup Is it down?

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