Updated on 2023-02-23 GMT+08:00

Viewing Intrusion Alarms

The HSS service displays alarm and event statistics and their summary all on one page. You can have a quick overview of alarms, including the numbers of servers with alarms, handled alarms, unhandled alarms, blocked IP addresses, and isolated files.

The Events page displays the alarm events generated in the last 30 days.

The status of a handled event changes from Unhandled to Handled.

Constraints and Limitations

  • To skip the checks on high-risk command execution, privilege escalation, reverse shells, abnormal shells, or web shells, manually disable the corresponding policies in the policy groups on the Policies page. HSS will not check the servers associated with disabled policies. For details, see Checking or Creating a Policy Group.
  • Other detection items cannot be manually disabled.
  • Servers that are not protected by HSS cannot perform alarm-related operations.


  1. Log in to the management console.
  2. In the upper left corner of the page, select a region, click , and choose Security & Compliance > Host Security Service.

    Figure 1 Accessing HSS

  3. In the displayed dialog box, click Try the new edition to switch to the HSS (New) console.

    • Currently, HSS is available in the following regions: CN South-Guangzhou, CN-Hong Kong, AP-Bangkok, and AP-Singapore.
    • On the HSS (New) console, you can click Back to Old Console in the upper left corner to switch to the HSS (Old) console.

  4. In the navigation pane on the left, choose Detection > Alarms and click Server Alarms.

    If your servers are managed by enterprise projects, you can select an enterprise project to view or operate the asset and scan information.

    Figure 2 Server alarms
    Table 1 Alarm statistics

    Alarm Event


    Affected Servers

    Number of servers for which alarms are generated.

    Alarms to be Handled

    Number of alarms to be handled.

    By default, all unhandled alarms are displayed on the Events page. For more information, see Server Alarm Types.

    Handled Alarms

    Number of handled alarms.

    Blocked IP Addresses

    Number of blocked IP addresses. You can click the number to check blocked IP address list.

    The blocked IP address list displays the server name, attack source IP address, login type, blocking status, number of blockings, blocking start time, and the latest blocking time.

    If a valid IP address is blocked by mistake (for example, after O&M personnel enter incorrect passwords for multiple times), you can manually unblock it. If a server is frequently attacked, you are advised to fix its vulnerabilities in a timely manner and eliminate risks.

    • After a blocked IP address is unblocked, HSS will no longer block the operations performed by the IP address.
    • A maximum of 10,000 IP addresses can be blocked for each type of software.

      If your Linux server does not support ipset, a maximum of 50 IP addresses can be clocked for MySQL and vsftp.

      If your Linux server does not support ipset or hosts.deny, a maximum of 50 IP addresses can be blocked for SSH.

    Isolated Files

    HSS can isolate detected threat files. Files that have been isolated are displayed on a slide-out panel on the Server Alarms page. You can click Isolated Files on the upper right corner to check them.

    You can recover isolated files. For details, see Managing Isolated Files.

  5. Click an alarm event in the list of event types to view the affected servers and occurrence time of the event. The following information is displayed:

    • Total number of alarms
    • Number of each type of alarms
    Figure 3 Alarm event statistics

  6. Click an alarm name to view its details.

    Figure 4 Alarm details