Troubleshooting
Captive Portal Triage: Connected, No Login Page, No Internet
09/23/2026
Find the first failed captive-portal layer, from association and addressing through discovery, authentication, access policy and upstream routing. Compare clients and preserve logs before changing settings; discovery and NAT behavior depend on the design.
DNS Drift: Why Your Router, Browser, VPN, and Phone Use Different Resolvers
08/22/2026
A detailed DNS audit for home networks and homelabs where router DHCP, browser Secure DNS, VPN clients, IPv6, and mobile Private DNS do not agree.
Why Your Gigabit Ethernet Is Stuck at 100 Mbps
08/03/2026
A practical troubleshooting flow for gigabit Ethernet links negotiating at 100 Mbps because of cables, ports, terminations, or hidden old devices.
DHCP vs DNS: What Breaks When Each One Fails
07/15/2026
Separate DHCP configuration faults from DNS lookup failures: inspect the client's address and gateway first, then test the configured resolver; a failed ping alone proves neither.