Networking basics

Troubleshooting

• Fix a MoCA adapter that will not work A MoCA adapter that will not work or connect. This guide helps you check coax cables, splitters, and filters—or call support when needed.
• Fix a modem that drops connection A modem that drops connection or loses sync repeatedly. This guide helps you check power, heat, signal, and line quality—or call your ISP when needed.
• Fix a modem that shows no light A modem that shows no lights or will not power on. This guide helps you check power, outlet, and cable—or call support when needed.
• Fix a modem that will not connect A modem that will not connect to the internet. This guide helps you check power, coax or phone line, signal, and ISP provisioning—or call your ISP when needed.
• Fix a modem that will not sync A cable or DSL modem that will not sync with the ISP. This guide helps you check coax or phone line, power, and signal—or call your ISP when needed.
• Fix a PAC file that will not work A PAC (proxy auto-config) file that does not route traffic correctly or causes connection failures. This guide helps you confirm the PAC URL loads, check the JavaScript syntax, verify FindProxyForURL logic, and rule out caching—or contact IT when corporate-managed.
• Fix a powerline adapter that will not connect A powerline adapter that will not connect or extend the network. This guide helps you check outlets, pairing, and electrical circuit—or call support when needed.
• Fix a proxy that will not connect A proxy that fails to connect or times out. This guide helps you confirm the proxy URL and port, check HTTP vs SOCKS, verify corporate proxy credentials, and rule out firewall or PAC conflicts—or contact IT when managed.
• Fix a static IP that will not work A device with a static IP that cannot reach the network or internet. This guide helps you verify subnet, gateway, and DNS, rule out IP conflicts and DHCP reservation overlap, then fix the configuration or switch to DHCP reservation.
• Fix a switch that will not forward A network switch that will not forward traffic or connect devices. This guide helps you check power, cables, VLANs, and configuration—or call support when needed.
• Fix an Ethernet cable that will not connect An Ethernet cable that will not connect or link. This guide helps you check the cable, ports, and device—or replace the cable when needed.
• Fix Ethernet that will not work Ethernet that will not work—no link, no internet, or device does not recognize the port. This guide helps you check the cable, driver, and port—or escalate when needed.
• Fix mixed content that blocks loading An HTTPS page that fails to load scripts, images, or other resources because they are requested over HTTP (mixed content). Browsers block HTTP resources on HTTPS pages. This guide helps you find the blocked URLs, convert them to HTTPS or use relative URLs, then verify the page loads.
• Fix NAT problems: double NAT, UPnP, port forward, bridge Games or VoIP break behind NAT. Eliminate double NAT, enable UPnP or forward ports, bridge spare router—avoid risky DMZ unless isolated.