Guides and free tools to help you protect your home, your network and the devices on it.
Troubleshooting
Connection problems
Browse by topic
Cameras & Home Security
Placement, wiring, power, storage and troubleshooting for security cameras and NVRs.
Networks & Devices
Secure your router, WiFi and the connected devices around your home. This area also covers safer remote access and NAS security.
Latest guides
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WiFi Channel Congestion & Camera Interference
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How Many WiFi Cameras Can Your Router Handle? (+ Calculator)
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Camera Won’t Reconnect After a Router or ISP Change
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How to Secure Your WiFi Camera: Passwords, Firmware & Network
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WiFi Camera Keeps Disconnecting: The Full Diagnostic
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How Much Bandwidth & Data Do WiFi Cameras Use? (+ Calculator)
Camera & NVR Tools
Plan storage, power, coverage, and network capacity — or troubleshoot a camera problem.
Security Camera Troubleshooting Tool
Not sure where to start? Pick the symptom you’re seeing — no video, offline, night vision, can’t view remotely, won’t record, and more — and we’ll route you straight to the fix.
Enter your cameras, resolution, recording mode, and how many days you want to keep — get an instant estimate of the hard drive size you need, plus a recommended surveillance drive.
Will your switch or NVR power all your cameras? Enter how many cameras you have, watts each draws, and your total PoE budget to see your load, headroom, and whether you’re in the clear or over budget.
Will your camera get enough power at the end of a long cable run? Enter length, cable type, and camera draw to see the voltage reaching the camera — and whether you’re within the 100m data limit.
Camera FOV & Coverage Calculator
How wide does your camera see, and how far can it actually identify a face versus just spot movement? Enter your lens and resolution for coverage width and DORI distances.
Who runs Guard Source HQ
Guard Source HQ grew out of problems I’ve spent years solving for myself, friends, and family. I’ve moved five times, set up all kinds of security camera systems, and helped friends and family install and troubleshoot theirs. I’ve had my own router compromised through a smart device, and people now come to me or get sent my way when something online doesn’t look right or after they’ve been scammed. I built Guard Source HQ to turn what I’ve learned from solving those problems into guides and tools regular people can use.
Guard Source HQ is independent, with no paid placements.
Need help with something I haven’t covered? Ask a question or suggest a topic.