indexo.dev

sublinear.info

.info crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 1516 ms crawled 2026-05-10

DE · 78.159.99.205 · AS28753 Leaseweb Deutschland GmbH

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title
Open Problems in Sublinear Algorithms
Language
en
Generator
MediaWiki 1.31.10
Feeds

Technology

Server
nginx

Contact

Email

Registration

Registrar
Tucows Domains Inc.
Created
2012-08-29
Expires
2027-08-29 467 days left
Updated
2025-02-26
Name servers
  • ns1.de.opalstack.com
  • ns2.de.opalstack.com
  • ns3.de.opalstack.com

DNS records live

NS
  • ns1.de.opalstack.com
  • ns2.de.opalstack.com
  • ns3.de.opalstack.com
MX
  • 10 mx1.de.opalstack.com
  • 10 mx2.de.opalstack.com

Email authentication partial

SPF
v=spf1 include:spf.opalstack.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none
policy: none (monitoring only)
DKIM
  • dkim: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCW2QPNdtWthXOM2KdGAZE4cLxL3Od6N3OYcm1OtJzRgj84IngAYrhJSE2BYwMzxbRS0jOdXidWcGS05bXea8…
selectors probed

Certificate (current)

R13
from 2026-03-03 to 2026-06-01
Expires in 13 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://sublinear.info/index.php?title=Main_Page

present
  • x-content-type-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff

Links to (1)

Linked from (3)