Overview

• Unexplained slowdowns or connection glitches can signal that a neighbor or other third party is on your home network without permission.
• Open your router’s administration page to review connected devices, using the printed URL or common defaults such as 192.168.0.1, 192.168.1.1, or fritz.box for Fritzbox models.
• To spot unknown devices, disconnect your own hardware and see what remains connected, then use apps and tools like AVM Fritz, TP‑Link, Asus, WiFiman, Fing, Wireshark, or Wireless Network Watcher for scans and alerts.
• If you find an intruder, block the device via access profiles or MAC filters, change the Wi‑Fi password, and enforce WPA2 or WPA3 with a strong 12–16+ character passphrase.
• The BSI advises turning off nonessential router features and disabling remote access when not needed, and replacing factory default credentials to shrink potential entry points.