How to Make QNAP NAS Secure

Hi, I have a Qnap T-253B nas. On the nas there is an antivirus software Clamav. Normaly the database should be update on daily basis.

Re: [Antivirus] Failed to update virus definitions. Update definitions manually, or try again later.

The provider is probably blocking the default User-agent that wget uses (and probably the agent the Qnap update process is using). This works ...

Do you have older QNAP NAS devices that have started failing to update the Antivirus definitions from clamav.net due to the version being too old?

Solution · Disable the warning message. Go to Applications > Antivirus > Overview. Disable Check and update automatically. · Mount the NAS shared ...

手動更新 · 按一下［瀏覽］。 · 找出並選擇.cvd 檔案。 · 按一下［確定］。 · 按一下［匯入］。 導入所有三個.cvd 檔案後，防毒軟體將變為最新版本。

Go to Control Panel > Applications > Antivirus. Import each .cvd file: Click Browse. Locate and select the .cvd file. Click Okay. Click Import.

從2021 年3 月開始，ClamAV 更新伺服器安全政策，停止為其舊版本的防毒引擎提供病毒定義。由於QNAP 已終止支援舊機型，因此我們沒有計劃提供錯誤修正或軟體更新來解決此問題。

Have you tried a manual update? I was seeing notifications of failed virus definition updates and tried updating manually, which worked for me.

Failed to update virus definitions. The volume used to store virus definitions is corrupt or missing. Create a new volume. Nothing has changed.