Existing: Sign in on PS3 under PlayStation Network.
3. Configure Network on PS3
Settings → Network Settings → Internet Connection Settings → OK.
Select Easy (auto-detect) or Custom (manual IP/DNS).
Choose Wired or Wireless → Scan/Enter SSID → Security type → Password.
Test Connection.
4. Troubleshooting
Router: Enable UPnP, set PS3 to DMZ, or port forward (TCP: 80, 443, 5223; UDP: 3478, 3479, 3658).
Disable media server connection if not used.
Update PS3 System Software (Settings → System Update).
Note: PlayStation Network on PS3 is largely deprecated; some features (store, trophies sync) may still work, but online multiplayer for most games is disabled.