Fallback IP 169.254.100.100
Access your Synology NAS using the fallback IP address
What is 169.254.100.100?
169.254.100.100 is a special fallback IP address used by Synology NAS devices when normal network configuration is unavailable or fails. This address provides emergency access to your device for recovery or initial setup purposes, particularly when DHCP is not available or network settings need to be reset.
How to Use Fallback IP
1
Network Setup
- Connect directly to NAS via ethernet
- Set PC IP to 169.254.100.1
- Set subnet mask to 255.255.0.0
- Disable other network connections
2
Access Device
- Open web browser
- Enter http://169.254.100.100
- Or use find.synology.com
- Wait for connection
3
Recovery Options
- Reset network settings
- Configure IP address
- Reset admin password
- Reinstall DSM if needed
Common Use Cases
Initial Setup
- First-time configuration
- Network setup
- DSM installation
- Basic configuration
Recovery
- Lost network settings
- Password reset
- System recovery
- Emergency access
Network Issues
- DHCP problems
- IP conflicts
- Configuration errors
- Connection troubleshooting
Common Issues & Solutions
Cannot Connect
- Verify direct connection
- Check PC IP settings
- Disable WiFi
- Try different browser
Access Problems
- Power cycle device
- Reset network settings
- Check cable connection
- Verify NIC status
Recovery Issues
- Use Synology Assistant
- Try manual IP configuration
- Check hardware status
- Contact support if needed