Recent Blog Posts
Fixing Dual-Stack IPv4/IPv6 rDNS & PTR Delegation
Resolve FCrDNS failures in dual-stack networks. Learn how to configure RFC 2317 IPv4 classless delegation and correct ip6.arpa reverse DNS zones.
Fixing SPF PermError and DKIM 2048-bit DNS Chunking Syntax
Debug SPF PermError lookup limits and fix DKIM 2048-bit public key chunking syntax across RFC-compliant DNS zone files to restore email deliverability.
Fixing DNSSEC SERVFAIL Errors on Domain Migration
Resolve DNSSEC SERVFAIL errors after domain migrations. Step-by-step guide to fixing mismatched DS records, RRSIG validation, and trust chain breaks.
Fixing DNS SERVFAIL Caused by Expired DNSSEC RRSIG Records
Diagnose and resolve DNS SERVFAIL errors caused by expired DNSSEC RRSIG records, validation mismatches, and broken trust chains.
Fix Nginx Upstream Sent Too Big Header 502 Error
Resolve Nginx 502 Bad Gateway 'upstream sent too big header' by properly configuring fastcgi_buffer_size, fastcgi_buffers, and proxy_buffer_size.
Fix DNSSEC SERVFAIL After Changing Nameservers
Website returning SERVFAIL after updating nameservers? Learn how stale DNSSEC DS records break DNS resolution and how to fix the issue in minutes.
Why Your Domain Transfer Gets Rejected Without Explanation
Domain transfer failed without explanation? Learn the hidden reasons behind rejected transfers, including locks, status flags, and ICANN restrictions.
Why a Domain Appears Available but Can’t Be Registered
Domain looks available but can't be registered? Discover why availability checks can fail and how registry rules, caching, and race conditions affect domain purchases.
Why Your Recently Purchased Domain Doesn’t Show You as the Registrant
Bought a domain but don't see your name in WHOIS? Learn why registrant info may be missing, what it means for ownership, and how to confirm you're in control.