Knowledge base for software setup, errors, and daily tool work.

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Docker Nginx 502 Bad Gateway: Memory Limit Fix

You're running Nginx in Docker as a reverse proxy, and suddenly you see 502 Bad Gateway error...

Fix Windows 11 WiFi No Internet Due to Antivirus Blocking

If your Windows 11 PC shows full WiFi bars but no internet access, your antivirus might be blocki...

How to Fix Chrome ERR_CONNECTION_RESET with DNS Flush

If Chrome shows ERR_CONNECTION_RESET, the connection was interrupted. This often...

Fix Docker Volume Permission Denied for Postgres

Fix Map Network Drive Access Denied on Windows 10

You try to map a network drive in Windows 10, but get an 'Access Denied' error. This usua...