DNS & Resolution
DNS Server Not Responding: 8 Proven Ways to Restore Internet
Clear hanging ISP resolver stalls by testing nslookup against secondary resolvers, reconfiguring IPv4/IPv6 adapter bindings, and flushing local DNS caches.
Marcus Vance
CCNP Enterprise Verified Reviewer
Lead Network Infrastructure Engineer & Systems Architect
Marcus has spent over 12 years diagnosing high-stakes telecommunications bottlenecks, datacenter Anycast DNS deployments, and Tier-1 ISP peering disputes. Before contributing to WhatMyIP.site, he engineered core routing policies for regional ISPs and managed autonomous systems (ASNs). He is dedicated to translating cryptic network error codes into practical, reproducible command-line solutions.
Anycast DNS
BGP Routing
CGNAT Bypass
CLI Diagnostics
Technical Articles & Troubleshooting Guides by Marcus
Peer-reviewed network troubleshooting procedures, packet inspection walkthroughs, and IP configuration tutorials.
DNS & Resolution
How to Fix DNS_PROBE_FINISHED_NXDOMAIN Error
Analyze non-existent domain response flags and resolve Chrome/Edge NXDOMAIN failures with step-by-step socket clearing and Winsock resets.
NAT & Routing
How to Check if You Are Behind CGNAT & How to Bypass It
Detect RFC 6598 carrier-grade NAT pools (100.64.0.0/10) that prevent inbound port forwarding, and bypass restrictions using reverse SSH tunnels and IPv6.
Gateway Conflicts
The Default Gateway Is Not Available: How to Fix Network Disconnects
Resolve intermittent network dropouts on Windows 11 caused by aggressive NIC power savings, duplicate gateway routes, and router ARP poisoning.
Gaming & Ports
How to Change Strict NAT Type to Open for Gaming
Fix multiplayer voice chat errors and lobby drops by locking down static DHCP reservations, enabling UPnP, and opening game port ranges.
CLI Diagnostics
How to Find Your Public IP via Terminal, PowerShell & CMD
Lightweight, browserless commands to instantly fetch WAN IPv4 and IPv6 addresses across Linux, macOS, and Windows PowerShell.