Applicable Products
NAS (QTS / QuTS Hero)
Scenario
To protect against malicious attacks, QTS has a built-in IP Blocking mechanism (IP Access Protection). This mechanism automatically blocks the source IP address when repeated incorrect login attempts or suspicious connection behavior are detected, preventing brute force attacks or malicious access to the NAS. A user is unable to access the NAS through the QTS web interface, SSH, or file sharing. It is suspected that the issue may be caused by IP blocking on the NAS.
Possible Causes
The NAS has IP access control enabled, blocking the specific computer.
The computer’s IP address has been added to the NAS blacklist.
Firewall or network security settings are preventing the connection.
Solution
Test with another computer
Try accessing the NAS (QTS web, SSH, or file services) using another device on the same network.
If the other device can connect successfully, the original computer’s IP is likely blocked.
Change the computer’s IP address
Check NAS blacklist settings
Restart the NAS as a last resort
If no devices can connect to the NAS, consider restarting it.
After rebooting, attempt to connect from a different device to verify if IP control was the cause.
How to Prevent Future IP Blocking
Whitelist trusted IPs: Add administrator computers to the whitelist in firewall or network access protection.
Avoid repeated login failures: Multiple failed login attempts may trigger automatic IP blocking.
Review security settings regularly: Periodically check blacklist and firewall rules to ensure admin devices are not mistakenly blocked.
Further Reading
Why is my device unable to access my QNAP NAS
适用产品
NAS (QTS / QuTS hero)
场景
为了防止恶意攻击，QTS 内置了 IP 阻止机制（IP 访问保护）。当检测到重复的错误登录尝试或可疑的连接行为时，该机制会自动阻止源 IP 地址，从而防止暴力破解攻击或恶意访问 NAS。用户无法通过 QTS 网页界面、SSH 或文件共享访问 NAS。怀疑问题可能是由IP 阻止在 NAS 上引起的。
可能原因
解决方案
使用其他计算机测试
更改计算机的 IP 地址
检查 NAS 黑名单设置
较后手段重启 NAS
如何防止未来的 IP 阻止
将可信 IP 加入白名单: 在防火墙或网络访问保护中将管理员计算机加入白名单。
避免重复登录失败: 多次登录失败可能触发自动 IP 阻止。
定期检查安全设置: 定期检查黑名单和防火墙规则，确保 admin 设备未被误阻止。
进一步阅读
为什么我的设备无法访问我的 QNAP NAS
