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gutenberg.org

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: misc

Security headers: F 17/100 (rank #403 of 461) · TLS: TLSv1.3 · Cert expires in 184 days (rank #443 of 459 soonest) · Response: 456.7 ms (rank #329 of 446)

Certificate valid for 184 more days (until May 4 19:43:16 2027 GMT).

TLS certificate

Field	Value
Issuer	SSL Corporation
Subject CN	*.gutenberg.org
Valid until	May 4 19:43:16 2027 GMT
Days left	184
TLS version	TLSv1.3
SAN entries	2

Security headers (17/100, grade F)

Header	Status
`strict-transport-security`	max-age=7776000; includeSubDomains
`content-security-policy`	missing
`x-frame-options`	missing
`x-content-type-options`	missing
`referrer-policy`	missing
`permissions-policy`	missing

Availability & performance

Field	Value
Availability	100% (3/3 probes)
Avg response	456.7 ms
Fastest / slowest	443.9 / 471.7 ms
HTTP status	200 (https)
Server	Apache

DNS & robots.txt

Field	Value
A records	152.19.134.47
Nameservers	ns.unc.edu, ns2.unc.edu
MX records	7
robots.txt	present (0 sitemap refs, 1 disallow rules)

How gutenberg.org compares

Site	Headers	Score	Cert days left	ms
speedtest.net	A	100	161	175.3
mozilla.org	B	83	42	106.1
iana.org	B	83	65	64.9
whatismyipaddress.com	B	83	45	34.2
archive.org	C	50	100	73.3
w3.org	C	50	34	97.9
ietf.org	C	50	79	98.1
ipinfo.io	C	50	88	136.5

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