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How to get alerted when someone changes your DNS records

How to get alerted when someone changes your DNS records

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7 min read
Why Is My Email Going to Spam? A Browser-Only Triage for SPF, DKIM, DMARC, PTR and Blocklists

Why Is My Email Going to Spam? A Browser-Only Triage for SPF, DKIM, DMARC, PTR and Blocklists

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6 min read
Two new x402 APIs: DNS AXFR vulnerability probe + Set-Cookie cache-disclosure (c148)

Two new x402 APIs: DNS AXFR vulnerability probe + Set-Cookie cache-disclosure (c148)

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4 min read
AWS na prática - balanceamento de carga via DNS com o Route 53

AWS na prática - balanceamento de carga via DNS com o Route 53

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5 min read
Testing a DMARC aggregate report pipeline before the first real report arrives

Testing a DMARC aggregate report pipeline before the first real report arrives

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9 min read
From URL to Pixels: DNS, TCP, TLS and Rendering Explained

From URL to Pixels: DNS, TCP, TLS and Rendering Explained

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5 min read
What Is Smart DNS Resolution for Proxy IPs? How to Avoid Cross-Region Resolution Errors?

What Is Smart DNS Resolution for Proxy IPs? How to Avoid Cross-Region Resolution Errors?

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5 min read
Unraveling GitHub Pages DNS Failures: Dnsruby Timeouts and Development Measurement Tools

Unraveling GitHub Pages DNS Failures: Dnsruby Timeouts and Development Measurement Tools

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5 min read
The Root KSK Rollover Is Done. Did Your Resolver's Trust Anchor Change?

The Root KSK Rollover Is Done. Did Your Resolver's Trust Anchor Change?

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9 min read
Your Product Lives on a Domain Whose Country Is Changing Hands

Your Product Lives on a Domain Whose Country Is Changing Hands

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2 min read
Bulk WHOIS with RDAP: domain age, expiry and SPF/DMARC grade for 1,000 domains

Bulk WHOIS with RDAP: domain age, expiry and SPF/DMARC grade for 1,000 domains

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5 min read
How to Move a Website to a New Host Without Downtime

How to Move a Website to a New Host Without Downtime

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4 min read
A 20-minute website security audit: CSP, HSTS, SPF/DMARC, and CAA explained for developers

A 20-minute website security audit: CSP, HSTS, SPF/DMARC, and CAA explained for developers

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6 min read
Reading a vendor's email and HTTPS setup from DNS before you sign

Reading a vendor's email and HTTPS setup from DNS before you sign

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8 min read
Hackers Got Valid TLS Certificates for Google Without Hacking Google. Here Is the 20-Minute Check That Protects Your Domain.

Hackers Got Valid TLS Certificates for Google Without Hacking Google. Here Is the 20-Minute Check That Protects Your Domain.

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7 min read
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