Rules

DEX rules allow you to create and manage testing policies for targeted user groups within your fleet (all devices with the Cloudflare One Client installed and connected to your Zero Trust organization). After creating a rule, you can use it to define the scope of a test to specific groups such as departments (like finance or sales), devices, and/or users. You can apply and reuse rules on your desired tests.

Use DEX rules to scope a test to a specific group within your fleet for more precise problem detection and resolution.

To create a rule:

1. In Cloudflare One , go to Insights > Digital experience.
2. Select the Rules tab.
3. Select Add a rule.
4. Give your rule a name and build your desired expressions.
5. Select Create rule to finalize your rule.

Selectors are required categories in a DEX rule expression that define a group within a fleet. The selector(s) you have defined in a rule will determine which group a test will impact.

Review the available selectors and their scope in the following list.

After you have created a rule, you can add it to a test. If you do not add a rule to a test, the test will run on your entire device fleet.

To add a rule to a test:

1. In Cloudflare One , go to Insights > Digital experience.
2. Select the Tests tab.
3. Choose an existing test and select Edit, or select Add a test to make a new test.
4. Under Select DEX rules, select the rule you would like to apply.
5. Select Save test for an existing rule or Add rule for the new test.

To view which tests a rule is being applied to:

1. In Cloudflare One , go to Insights > Digital experience.
2. Select the Rules tab.
3. Choose a rule and select Edit.
4. Select the DEX tests tab and review the list of tests that include your selected rule.

You can create a new test from the DEX test dashboard as described above or directly from the DEX rules dashboard.

To create a new test using a rule from DEX rules:

1. In Cloudflare One , go to Insights > Digital experience.
2. Select the Rules tab.
3. Select a rule and select Edit.
4. Select the DEX tests tab.
5. You will be able to review all the tests that currently include this rule. To create a new test, select Create a test using this rule.
6. Enter all required information, making sure that the box next to your rule name is checked.
7. Select Add test.

• DEX HTTP test - Assess the accessibility of a web application.
• DEX Traceroute test - Measure the network path of an IP packet from an end-user device to a server.