Alert notification

Add a monitoring rule

You can add a maximum of 15 monitoring rules.

1. Log on to the Captcha 2.0 console.

2. In the left-side navigation pane, click Alert Notifications.

3. In the Configure Monitoring Rules section, click Add, configure the following fields, and then click Save.

Rule types

Choose a rule based on what you want to detect:

24-hour absolute volume rules — alert when a metric exceeds a fixed threshold over the past 24 hours:

• Last 24 hours initialization/verification/interception volume greater than: triggers when the volume exceeds the threshold.

• Last 24 hours interception rate greater than: triggers when the interception volume exceeds 1,000 and the interception rate exceeds the threshold.

1-hour growth rate rules — alert when a metric spikes compared to the previous hour:

• Last 1 hour initialization/verification/interception volume growth rate greater than: triggers when the volume in the last hour exceeds 100 and the growth rate compared to the previous hour exceeds the threshold.

• Last 1 hour interception rate growth rate greater than: triggers when the interception rate increase compared to the previous hour exceeds the threshold.

1-hour decrease rate rules — alert when a metric drops compared to the previous hour:

• Last 1 hour initialization/verification volume decrease rate greater than: triggers when the volume in the last hour exceeds 100 and the decrease rate compared to the previous hour exceeds the threshold.

High-frequency alerts are subject to a 10-minute suppression by default — duplicate alerts within a 10-minute window are not sent. To extend this suppression window, configure a suppression time greater than 10 minutes when setting up your CloudMonitor subscription policy.

Manage monitoring rules

To disable a rule, turn off the toggle in the Status column.

To delete a rule, click in the Actions column.

Create alert contacts and contact groups

If you have already configured alert contacts and contact groups in CloudMonitor, skip to Subscribe to Captcha alerts.

1. In the Alert Notification Configuration area, click Create Contact and Contact Group to open the CloudMonitor console.

2. Create an alert contact:

   1. On the Alert Contacts tab, click Create Alert Contact.

   2. In the Set Alert Contact panel, configure the following parameters:

      Parameter	Description
      Name	Contact name. Must start with a letter and be 2–40 characters. Accepts letters, digits, periods (.), and underscores (_).
      Region for Alert Notification Service	Region where contact data (name, email address) is stored and processed.
      Phone	Mobile phone number. Only numbers with country code 86 support SMS alerts.
      Email ID	Email address of the contact.
      Description	Optional description.
      DingTalk | Lark | WeCom | Slack webhook URL	Webhook URL for the contact. Must start with http:// or https://. Click Test to verify connectivity before saving.
      Language of alert notifications	Defaults to Automatic, which matches the language of your Alibaba Cloud account.

   3. Click OK.

   4. Activate the contact's email address. The email address starts in Pending Activation state. The contact must click the activation link in the email within 24 hours. After activation, the email address appears in the contact list and alerts can be delivered.

   5. (Optional) Activate the email address and phone number.

      If you specify an email address and phone number, their status is Pending Activation by default. The contact must click the activation links in the email and text message within 24 hours to receive alert notifications. After activation, the email address and phone number appear in the contact list.

3. Create an alert contact group:

   1. Log on to the CloudMonitor console.

   2. In the left-side navigation pane, choose Alerts > Alert Contacts.

   3. Click the Alert Contact Group tab, then click Create Alert Contact Group.

   4. Enter a name for the group, add contacts, and click Confirm.

4. (Optional) Add multiple contacts to a group in bulk:

   1. Log on to the CloudMonitor console.

   2. In the left-side navigation pane, choose Alerts > Alert Contacts.

   3. On the Alert Contacts tab, select the contacts to add.

   4. Click Add to Contact Group, select the target group, and click OK.

Subscribe to Captcha alerts

Subscribe to Captcha system events in CloudMonitor to start receiving alert notifications. Alerts are delivered via the channels you configure (phone call, SMS, DingTalk, email, and more).

CloudMonitor alert notifications may incur charges. For details, see Billing overview.

1. In the Subscribe to Monitoring Notifications area, click Subscribe Now to open the CloudMonitor console.

2. On the Create Subscription Policy page, configure the following:

   Basic information

   Field	Value
   Name	A descriptive name, for example, Information verification abnormal alert.
   Description	Optional.

   Alert subscription

   Field	Value
   Subscription type	Select System Events.
   Products	Select Captcha.
   Event type	Select Captcha > Abnormal.
   Event name	Leave blank.
   Event level	Leave blank.
   Application grouping	Leave blank.
   Event content	Leave blank.
   Event resources	Leave blank.

   Combined noise reduction

   Field	Value
   Merge content	Leave blank.
   Noise reduction	To extend the default 10-minute suppression window, enter a value greater than 10 minutes. Otherwise, leave blank to use the default.

   Notification

   Field	Value
   Notification configuration	Select the alert contacts or contact groups to notify.
   Custom notification method	Customize delivery channels if needed, or keep the defaults.
   Push channel	Optional.