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Four BIND 9 flaws, no workarounds: planning for a resolver that cannot fail over

Four BIND 9 flaws, no workarounds: planning for a resolver that cannot fail over

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4 min read
19.4 million BIND fingerprints, and the two facts a scan cannot tell you about CVE-2026-94300

19.4 million BIND fingerprints, and the two facts a scan cannot tell you about CVE-2026-94300

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4 min read
Bulk WHOIS lookup in Python with RDAP: domain age, expiry, registrar and availability (no scraping, 2026)

Bulk WHOIS lookup in Python with RDAP: domain age, expiry, registrar and availability (no scraping, 2026)

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Comments 2
6 min read
The DMARC Record a Small Business Should Publish First (and When to Tighten It)

The DMARC Record a Small Business Should Publish First (and When to Tighten It)

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4 min read
DMARC fails even though SPF and DKIM pass: how alignment actually works

DMARC fails even though SPF and DKIM pass: how alignment actually works

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2 min read
What Happens in the 50 ms Before Every Request: A Walkthrough of DNS Resolution

What Happens in the 50 ms Before Every Request: A Walkthrough of DNS Resolution

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8 min read
Lovable custom domain stuck on Verifying? It is almost always one of five DNS or auth settings

Lovable custom domain stuck on Verifying? It is almost always one of five DNS or auth settings

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2 min read
How to preview a site on a new server without editing the hosts file

How to preview a site on a new server without editing the hosts file

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6 min read
Outlook 550 5.7.515: "sending domain does not meet the required authentication level"

Outlook 550 5.7.515: "sending domain does not meet the required authentication level"

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2 min read
Your SPF record has a limit of 10 DNS lookups. Here's how to count yours and fix it

Your SPF record has a limit of 10 DNS lookups. Here's how to count yours and fix it

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2 min read
Check SPF, DMARC and DKIM for a list of domains in Python (bulk email DNS audit, 2026)

Check SPF, DMARC and DKIM for a list of domains in Python (bulk email DNS audit, 2026)

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6 min read
Home Lab Networking: DNS, VPN, VLANs, and Reverse Proxy Flow

Home Lab Networking: DNS, VPN, VLANs, and Reverse Proxy Flow

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9 min read
Cold email infrastructure as code review: domains, inboxes, DNS and warmup

Cold email infrastructure as code review: domains, inboxes, DNS and warmup

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4 min read
How to Speed Up DNS Propagation and Reduce Downtime

How to Speed Up DNS Propagation and Reduce Downtime

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3 min read
Don't Bet Your Infrastructure on One DNS Resolver: Building a Resilient Encrypted DNS Layer with Unbound

Don't Bet Your Infrastructure on One DNS Resolver: Building a Resilient Encrypted DNS Layer with Unbound

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7 min read
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