There might be scenarios where it should be disabled in earlier versions as well. This can be achieved e.g. with Tomcat Security Constraints. To add such a constraint, open <Tomcat>\webapps\Thingworx\WEB-INF\web.xml
At the end of the file add a new constraint just before closing the </web-app> tag:
Accessing the /Thingworx/Squeal resource now will result in an error message:
HTTP Status 403 - Access to the requested resource has been denied
One scenario to be aware of is when the web.xml changes, e.g. due to updating ThingWorx or other manual changes. In such a case, ensure that the filter is still present in the file and taken into account.