# Real Network Fixes

> Independent, plain-language network troubleshooting guides for home users, small businesses and IT technicians in the USA and worldwide. Covers internet connectivity, switches and routers, firewalls and VPNs, Wi-Fi, fiber and copper cabling, and ISP/WAN circuits. Visitors can submit a network problem and receive written troubleshooting guidance; answered questions are published as Solved Questions after review, without personal details.

Guidance is general. Readers should back up device configurations before making changes. The site does not promote any IT company.

## Section guides

- [ISP and WAN Troubleshooting: Circuit Down, ONT Lights, Failover and Slow Gigabit](https://realnetworkfixes.com/isp-and-wan-troubleshooting/): Plain-language ISP and WAN troubleshooting: ONT lights, bypass test, circuit down, WAN failover, slow gigabit internet, circuit turn-up and demarcation.
- [Fiber Optic and Cabling Troubleshooting: Link Down, High Loss, SFPs and Ethernet Cables](https://realnetworkfixes.com/fiber-optic-and-cabling-troubleshooting/): Fix fiber and Ethernet cabling problems: link down, high loss, polarity, SFP mismatches, OTDR tests, single-mode vs multimode, Cat5e/Cat6 terminations.
- [Firewall Troubleshooting: Blocked Traffic, NAT, VPN and Migrations](https://realnetworkfixes.com/firewall-troubleshooting/): Plain-language firewall troubleshooting for small businesses: rules, NAT, VPN tunnels, FortiGate, SonicWall and Cisco ASA tools, and safe migrations.
- [Wi-Fi and Wireless Troubleshooting: Drops, Weak Signal, Offline APs and Interference](https://realnetworkfixes.com/wi-fi-and-wireless-troubleshooting/): Plain-language Wi-Fi troubleshooting for homes and small businesses: disconnections, weak signal, offline access points, heatmaps, interference and Meraki.
- [Switch and Router Troubleshooting: Ports, VLANs, Routing and PoE](https://realnetworkfixes.com/switch-and-router-troubleshooting/): Troubleshoot switches and routers: dead ports, err-disabled, VLAN and trunk issues, routing problems and PoE power failures, with Cisco commands.
- [Network Connectivity Troubleshooting: No Internet, Slow Speeds, Dropouts and More](https://realnetworkfixes.com/network-connectivity-troubleshooting/): Fix network connectivity problems: no internet, slow speed, dropouts, packet loss, DNS, DHCP, IP conflicts and latency, with simple tests for each.

## Problem-specific articles

- [Ethernet Connection Randomly Drops from 1 Gbps to 100 Mbps: Causes, Troubleshooting and Resolution](https://realnetworkfixes.com/ethernet-drops-1-gbps-to-100-mbps/): Ethernet keeps dropping from 1 Gbps to 100 Mbps? Usually a cable or connector fault. How to test link speed, the cable and ports, and fix it.
- [Websites Won’t Load, but the Internet Is Connected (DNS Problems)](https://realnetworkfixes.com/websites-wont-load-dns-problems/): Internet connected but websites won’t load? It’s usually DNS. Step-by-step tests with ping and nslookup, what results mean, and how to fix it.

## Get help

- [Submit a network issue](https://realnetworkfixes.com/submit-issue/)
- [Track an issue](https://realnetworkfixes.com/track-issue/)
- [Solved questions](https://realnetworkfixes.com/questions/)
- [About and editorial policy](https://realnetworkfixes.com/about/)