To add the condition to the example signature:
Click Condition 1 so that it is highlighted.
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Click AND in the Comparisons section.
The Add AND Comparision window opens.
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For this example, select Numeric Value Match in the Comparison Type drop-down menu.
Select FTP from the Protocol list.
Because you selected FTP, the Custom Attack Editor displays the FTP-specific protocol fields on the following screen.
Configure the fields for the comparison you have chosen.
For this example, specify cmd-param-length for the Protocol Field. This specifies that the Sensor should search in the URI of the request packet.
Select mkd as the qualifier.
From the Operator drop-down list, select the matching criteria as Equals which means that the comparison criteria must be equal to the regular expression entered.
Type the value to match using the Value to Match.
For this example, the value to match is "50".
Click Save.
Your comparison appears under Condition 1.
Click Add in the New Custom Attack window.
Verify that the attack definition is listed on the Native Trellix IPS Format tab.
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Click Save to save the Trellix IPS Custom Attack in the Manager server database.
Make sure the Trellix IPS Custom Attack is saved in the database and also published in the policies.