You can do that in csf user panel menu, problem is the default is not good for DA.
(this with the csf plugin for DA (admin) doesn't have the right changes for a DA installation, if you use that option you lock yourself out of DA! )
So lesson sorry i don't know how to solve, but read everytime with such things what default settings are ( is in a readme on the CSf site i did the reading when i had some probs in the past and then you know don't use this option!), while oft is something back to basic default not so good!
You can find this setting at backup restore configuration/settings in CSF plugin menu.. "firewall profiles"
(so the csf.conf is replaced with a default csf.conf one which is one used for Cpanel or sofar i then checked, so no DA ports and so on in this default conf)
Should be in testing mode by default?
the default yes shame from a da plugin has this for example in it::
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نویسنده: ایمان اصلاحی