What to Do If Your NAS Cannot Access the Internet?
Applicable Systems: TOS 6, TOS 7
1. Check NAS Network (Physical Connection and Interface Status)
- Check Network Cable and Port
Actions:
- Confirm that the NAS is connected to the LAN port of a router or modem via a network cable, and ensure the plug is secure.
- Try replacing the network cable or changing the router port for testing.
- Observe the status of the NAS network port LED.
Diagnosis:
- LED is steady or blinking → Proceed to the next step.
- LED is off → Usually indicates the interface is not connected successfully. Possible causes include:
- Damaged network cable
- Router port malfunction
- NAS network port failure
Solution:
- Replug the network cable, replace the cable or port. If there is still no connection, contact after-sales support.
- Check Interface Status Path: Control Panel → Network → Interfaces
- Click the currently used interface to view the following information:
- Interface status
- IP address
- Default gateway 、
Normal Example:
- IP: 192.168.1.100
- Gateway: 192.168.1.1
Diagnosis:
- NAS interface status shows "Disconnected" → Replug the network cable, or connect to another router for verification. If it remains disconnected, it is likely a network port issue.
- Interface is connected → Proceed to the next step.
2. Check Gateway and DNS Settings
Issue: IP obtained, but cannot access the internet
- Check Default Gateway and DNS Actions:
- Go to Control Panel → Network → Interfaces → Edit → View default gateway and DNS.
Diagnosis and Solution:
- Gateway is empty → Fill in the router IP (e.g., 192.168.1.1). Without a default gateway, only LAN access is possible.
- DNS is empty or incorrect → Recommended DNS:
- Recommended for Mainland China: 223.5.5.5 (Ali), 114.114.114.114 (114 DNS)
- Recommended for overseas users: 8.8.8.8 (Google), 1.1.1.1 (Cloudflare)
Note:
- Even if the gateway is correctly configured, incorrect DNS can still prevent internet access.
- DNS availability varies by country/region; some public DNS may not resolve properly in certain areas.
- If the above DNS are unavailable, search for common local DNS in your country and add them manually.
3. Test Whether the NAS Can Connect to the Internet
Actions: Log in via NAS terminal or SSH and execute:
ping 8.8.8.8
Diagnosis:
- Ping succeeds → As shown in the example, indicates the NAS can connect to the internet. If you still cannot access the internet, go back and check DNS settings.
- Ping fails → As shown in the example, try connecting the NAS to another router or modem for verification, or restart the router.
- If it returns to normal → The original network environment has restrictions or configuration anomalies.
- If it remains abnormal → Contact after-sales support.
4. Important for Users with Multiple Network Interfaces
Issue: When the NAS is connected to multiple network interfaces simultaneously, even if the IP addresses of each interface are not duplicated, routing conflicts may occur, leading to internet issues. Path: Control Panel → Network → Interfaces Solution:
- Disable excess network interfaces
- During troubleshooting, keep only one interface active
- For link aggregation, ensure the switch and NAS configurations are consistent
Diagnosis:
- Only one network interface has a default gateway set → Normal
- Multiple network interfaces have default gateways set → May cause routing conflicts; it is recommended to keep only one default gateway
Troubleshooting Suggestions:
- If not using link aggregation, disable excess interfaces
- When using link aggregation, ensure the switch and NAS mode are consistent (static / LACP)
- Note: If you are unsure whether link aggregation is enabled, it is recommended to remove the bond during troubleshooting and keep only one interface connected; if internet access is restored after disabling it, the issue is related to the aggregation configuration.
Explanation: Multiple interface conflicts may cause SMB multi-channel and internet access issues. Therefore, maintaining a single network environment during troubleshooting is the safest approach.
5. Troubleshoot NAS Proxy and Security Isolation
Explanation: If the NAS has a proxy or security isolation mode enabled, it may also prevent internet access.
- Check if NAS Proxy is Enabled Path: Control Panel → Network → Advanced → Proxy Settings Diagnosis:
- Proxy not enabled → Can skip
- Proxy enabled → If the proxy service is abnormal, internet access may be affected
Solution:
-
Temporarily disable the proxy connection for troubleshooting.
-
Test if internet access is restored.
-
If restored → The issue is caused by the proxy service.
-
If still inaccessible → Continue checking default gateway / DNS / router.
-
Check if Security Isolation Mode is Enabled Path: Control Panel → Security → Security Isolation Mode Diagnosis:
- Isolation mode not enabled → Can skip
- Isolation mode enabled → Will block the NAS from connecting to the internet
Solution:
- Disable security isolation mode.
6. Restart Network Management Services
Issue: When hardware and router are normal, but the NAS network is still abnormal, restarting network services may resolve the issue. Path:
- For TOS 7 system, go to → Desktop → Terminal application
- For TOS 6 system, go to → Start → Terminal application
- If your system is TOS 7, or TOS 6 version higher than 6.0.694, execute the following commands:
- Enter the restart service command:
systemctl restart systemd-networkd.service
- Enter systemctl status systemd-networkd to check service status:
systemctl status systemd-networkd
- If it shows Active (running), the network service has been successfully restarted.
- If your system version is lower than TOS 6.0.694, execute the following commands:
- Enter the restart service command:
systemctl restart NetworkManager
- Enter systemctl status systemd-networkd to check service status:
systemctl status NetworkManager
- If it shows Active (running), the network service has been successfully restarted.
Note: The network will temporarily disconnect; please ensure the current environment is safe.