indexo.dev

zeltser.com

.com crawl

First seen 2026-06-04 · Last seen 2026-06-04 · ok HTTP/1.1 200 192 ms crawled 2026-06-04

US · 104.21.31.74 · AS13335 Cloudflare, Inc.

Reputation 92/100 weak subdomain policy

Classifying

HTML metadata

Title
Lenny Zeltser | Security leader with technical depth and business mindset
Description
Builder of security products and programs. Teacher of those who run them. Cybersecurity executive, SANS Faculty Fellow, and creator of REMnux.
Language
en
Canonical
https://zeltser.com/
Feeds

Open Graph

url
https://zeltser.com/
title
Lenny Zeltser | Security leader with technical depth and business mindset
site name
Lenny Zeltser
description
Builder of security products and programs. Teacher of those who run them. Cybersecurity executive, SANS Faculty Fellow, and creator of REMnux.

Technology

CDN
Cloudflare
Analytics
  • Cloudflare Insights

Third-party hosts loaded (2)

  • challenges.cloudflare.com×1
  • static.cloudflareinsights.com×1

Registration

Registrar
Cloudflare, Inc.
Created
1999-12-07
Expires
2026-10-22 133 days left
Updated
2025-12-05
Name servers
  • alina.ns.cloudflare.com
  • trey.ns.cloudflare.com

DNS records live

NS
  • alina.ns.cloudflare.com
  • trey.ns.cloudflare.com
MX
  • 10 aspmx.l.google.com
  • 20 alt1.aspmx.l.google.com
  • 30 alt2.aspmx.l.google.com
  • 40 aspmx2.googlemail.com
  • 50 aspmx3.googlemail.com
TXT
  • keybase-site-verification=R46xUpi8uAlOyGXqZghdp2ZFakb8vvvo2YV00imTJ7g
  • v=MCPv1; k=ed25519; p=lnNSLXRXhyWT2FxjKKyjmzC+R45PjpMrhLKVcOwQx4M=
Verified for
  • Google

Email authentication strong

SPF
v=spf1 ip4:138.197.15.59 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; rua=mailto:crvatvbh@ag.dmarcian.com; ruf=mailto:crvatvbh@fr.dmarcian.com; adkim=r; aspf=r; pct=100; sp=none
policy: quarantine · sp=none
DKIM
  • google: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCdKs1sXKmNd+wU7dVSP9EK6ixhJ5W5jowAZNfpg0n9DUgztIHoaU4d8MD3ajMh0yXLrZ6e/pGvcQ27mGe3Rb…
  • k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…
selectors probed

Certificate (current)

WE1
from 2026-04-08 to 2026-07-07
Expires in 27 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://zeltser.com/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • permissions-policy
findings
  • CSP allows unsafe inline scripts/styles
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
permissions-policy
accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=(), interest-cohort=()
x-content-type-options
nosniff
content-security-policy
default-src 'self'; script-src 'self' 'unsafe-inline' 'wasm-unsafe-eval' data: https://challenges.cloudflare.com https://static.cloudflareinsights.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self' https://challenges.cloudflare.com https://static.cloudflareinsights.com; frame-src 'self' https://challenges.cloudflare.com https://www.youtube.com https://www.youtube-nocookie.com https://fast.wistia.net; worker-src 'self'; frame-ancestors 'self'; base-uri 'self'; form-action 'self'; object-src 'none'; upgrade-insecure-requests
strict-transport-security
max-age=31536000; includeSubDomains

Linked from (1)

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  -H "X-API-Key: idx_..."

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