Help Center/ Host Security Service/ FAQs/ Protection Quota/ If I Change the OS of a Protected Server, Does It Affect My HSS Quota?
Updated on 2025-08-07 GMT+08:00
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If I Change the OS of a Protected Server, Does It Affect My HSS Quota?

No. But before changing the server OS, you need to check whether the HSS agent supports the new OS. To obtain better HSS service experience, you are advised to install or upgrade to an OS version supported by the agent.

HSS agents can run on Linux servers, such as CentOS and EulerOS; and Windows servers, such as Windows 2012 and 2016.

The agent is probably incompatible with the Linux or Windows versions that have reached end of life. To obtain better HSS service experience, you are advised to install or upgrade to an OS version supported by the agent.

Table 1 HSS restrictions on Windows (x86)

OS

Agent

System Vulnerability Scan

Windows 10 (64-bit)

√

NOTE:

Only Huawei Cloud Workspace can use this OS.

×

Windows 11 (64-bit)

√

NOTE:

Only Huawei Cloud Workspace can use this OS.

×

Windows Server 2012 R2 Standard 64-bit English (40 GB)

√

√

Windows Server 2012 R2 Standard 64-bit Chinese (40 GB)

√

√

Windows Server 2012 R2 Datacenter 64-bit English (40 GB)

√

√

Windows Server 2012 R2 Datacenter 64-bit Chinese (40 GB)

√

√

Windows Server 2016 Standard 64-bit English (40 GB)

√

√

Windows Server 2016 Standard 64-bit Chinese (40 GB)

√

√

Windows Server 2016 Datacenter 64-bit English (40 GB)

√

√

Windows Server 2016 Datacenter 64-bit Chinese (40 GB)

√

√

Windows Server 2019 Datacenter 64-bit English (40 GB)

√

√

Windows Server 2019 Datacenter 64-bit Chinese (40 GB)

√

√

Windows Server 2022 Datacenter 64-bit English (40 GB)

√

√

Windows Server 2022 Datacenter 64-bit Chinese (40 GB)

√

√

Windows Server 2022 Standard 64-bit English (40 GB)

√

√

Windows Server 2022 Standard 64-bit Chinese (40 GB)

√

√
Table 2 HSS restrictions on Linux (x86)

OS

Agent

System Vulnerability Scan

CentOS 7.4 (64-bit)

√

√

CentOS 7.5 (64-bit)

√

√

CentOS 7.6 (64-bit)

√

√

CentOS 7.7 (64-bit)

√

√

CentOS 7.8 (64-bit)

√

√

CentOS 7.9 (64-bit)

√

√

CentOS 8.1 (64-bit)

√

×

CentOS 8.2 (64-bit)

√

×

CentOS 8 (64-bit)

√

×

CentOS 9 (64-bit)

√

×

Debian 9 (64-bit)

√

√

Debian 10 (64-bit)

√

√

Debian 11 (64-bit)

√

√

Debian 12 (64-bit)

√

NOTE:

Currently, brute-force attack detection is not supported.

×

EulerOS 2.2 (64-bit)

√

√

EulerOS 2.3 (64-bit)

√

√

EulerOS 2.5 (64-bit)

√

√

EulerOS 2.7 (64-bit)

√

×

EulerOS 2.9 (64-bit)

√

√

EulerOS 2.10 (64-bit)

√

√

EulerOS 2.11 (64-bit)

√

√

EulerOS 2.12 (64-bit)

√

√

Fedora 28 (64-bit)

√

×

Fedora 31 (64-bit)

√

×

Fedora 32 (64-bit)

√

×

Fedora 33 (64-bit)

√

×

Fedora 34 (64-bit)

√

×

Ubuntu 16.04 (64-bit)

√

√

Ubuntu 18.04 (64-bit)

√

√

Ubuntu 20.04 (64-bit)

√

√

Ubuntu 22.04 (64-bit)

√

√

Ubuntu 24.04 (64-bit)

√

NOTE:

Currently, brute-force attack detection is not supported.

√

Red Hat Enterprise Linux 7.4 (64-bit)

√

×

Red Hat Enterprise Linux 7.6 (64-bit)

√

×

Red Hat Enterprise Linux 8.0 (64-bit)

√

×

Red Hat Enterprise Linux 8.7 (64-bit)

√

×

openEuler 20.03 LTS

√

√

openEuler 20.03 LTS SP1

√

√

openEuler 20.03 LTS SP2

√

√

openEuler 20.03 LTS SP3

√

√

openEuler 20.03 LTS SP4

√

√

openEuler 22.03 LTS

√

√

openEuler 22.03 LTS SP1

√

√

openEuler 22.03 LTS SP2

√

√

openEuler 22.03 LTS SP3

√

√

openEuler 22.03 LTS SP4

√

√

openEuler 24.03 LTS

√

√

AlmaLinux 8.4 (64-bit)

√

√

AlmaLinux 9.0 (64-bit)

√

×

AlmaLinux 9.2 (64-bit)

√

×

AlmaLinux 9.4 (64-bit)

√

×

Rocky Linux 8.4 (64-bit)

√

√

Rocky Linux 8.5 (64-bit)

√

√

RockyLinux 8.6 (64-bit)

√

√

RockyLinux 8.10 (64-bit)

√

√

Rocky Linux 9.0 (64-bit)

√

√

RockyLinux 9.1 (64-bit)

√

√

RockyLinux 9.2 (64-bit)

√

√

RockyLinux 9.3 (64-bit)

√

×

RockyLinux 9.4 (64-bit)

√

√

RockyLinux 9.5 (64-bit)

√

√

Huawei Cloud EulerOS 1.1 for CentOS (64-bit)

√

√

Huawei Cloud EulerOS 2.0 Standard Edition (64 bit)

√

√

SUSE Linux Enterprise Server 12 SP5 (64 bit)

√

√

SUSE Linux Enterprise Server 15 (64 bit)

√

×

SUSE Linux Enterprise Server 15 SP1 (64 bit)

√

√

SUSE Linux Enterprise Server 15 SP2 (64 bit)

√

√

SUSE Linux Enterprise Server 15 SP3 (64 bit)

√

×

SUSE Linux Enterprise Server 15.5 (64 bit)

√

×

SUSE Linux Enterprise Server 15 SP6 (64 bit)

√

NOTE:

Currently, brute-force attack detection is not supported.

×

Kylin V10 (64 bit)

√

√

Kylin V10 SP1 (64 bit)

√

√

Kylin V10 SP2 (64 bit)

√

√

Kylin V10 SP3 (64 bit)

√

√

UnionTech OS 1050u2e

√

NOTE:

Currently, file escape detection is not supported.

√

UnionTech OS V20 1070e (64-bit)

√

√
Table 3 HSS restrictions on Linux (Arm)

OS

Agent

System Vulnerability Scan

CentOS 7.4 (64-bit)

√

√

CentOS 7.5 (64-bit)

√

√

CentOS 7.6 (64-bit)

√

√

CentOS 7.7 (64-bit)

√

√

CentOS 7.8 (64-bit)

√

√

CentOS 7.9 (64-bit)

√

√

CentOS 8.0 (64-bit)

√

×

CentOS 8.1 (64-bit)

√

×

CentOS 8.2 (64-bit)

√

×

CentOS 9 (64-bit)

√

×

Debian 11 (64-bit)

√

√

Debian 12 (64-bit)

√

NOTE:

Currently, brute-force attack detection is not supported.

×

EulerOS 2.8 (64-bit)

√

√

EulerOS 2.9 (64-bit)

√

√

EulerOS 2.10 (64-bit)

√

√

EulerOS 2.11 (64-bit)

√

√

EulerOS 2.12 (64-bit)

√

√

Fedora 29 (64-bit)

√

×

Ubuntu 18.04 (64-bit)

√

√

Ubuntu 20.04 (64-bit)

√

√

Ubuntu 22.04 (64-bit)

√

√

Ubuntu 24.04 (64-bit)

√

NOTE:

Currently, brute-force attack detection is not supported.

√

NeoKylin Linux Advanced Server Operating System V7 (64-bit)

√

×

Kylin V10 (64 bit)

√

√

Kylin V10 SP1 (64 bit)

√

√

Kylin V10 SP2 (64 bit)

√

√

Kylin V10 SP3 (64 bit)

√

√

Huawei Cloud EulerOS 2.0 Standard Edition (64 bit)

√

√

UnionTech OS V20 (64-bit)

√

√

NOTE:

Only UnionTech OS V20 server editions E and D support system vulnerability scan.

UnionTech OS V20 1050e (64-bit)

√

√

UnionTech OS V20 1060e (64-bit)

√

√

UnionTech OS V20 1070e (64-bit)

√

√

openEuler 20.03 LTS

√

√

openEuler 20.03 LTS SP1

√

√

openEuler 20.03 LTS SP2

√

√

openEuler 20.03 LTS SP3

√

√

openEuler 20.03 LTS SP4

√

√

openEuler 22.03 LTS

√

√

openEuler 22.03 LTS SP1

√

√

openEuler 22.03 LTS SP2

√

√

openEuler 22.03 LTS SP3

√

√

openEuler 22.03 LTS SP4

√

√

openEuler 24.03 LTS

√

√

Rocky Linux 9.0 (64-bit)

√

√

RockyLinux 9.5 (64-bit)

√

√

CTyunOS 3-23.01 (64-bit)

√

√
Parent topic: Protection Quota