Why do I receive a "failed to connect to the internet after checking NCSI" error log?
Last modified date:
2023-09-07
Applicable Products
All NAS series
Details
To determine if it is connected to the internet or not, a QNAP NAS will check for a Network Connectivity Status Indicator (NCSI). If the internet connection is blocked, disconnected, or unstable then this check will fail and the following warning will be logged:
Network & Virtual Switch Infrastructure [Network & Virtual Switch] Failed to connect to the internet. System default gateway "Adapter 1" and all adapters failed to connect to the internet after checking NCSI.The NCSI test tries to reach ncsi.qnap.com, so this URL should be whitelisted on your firewall if you intend to allow the NAS to reach the internet.
If you do not intend to connect your NAS to the internet, you can prevent this error from being logged by following these steps:
- Log in to the NAS as an administrator.
- Open Network & Virtual Switch.
- Go to Network > Interfaces.
- Click System Default Gateway.
- The System Default Gateway window appears.
- Select Disable the NCSI (Network Connectivity Status Indicator) service.
- Click Apply.
Further Reading
What firewall or proxy rules should I configure for WAN services?
