Website access problem

[dadashali]

Hi,
I can't access my website with an specific user IP while that ip does not blocked or even isn't at any error log also isn't listed on csf with csf -g command. But once I disable the CSF i can access to that site with out any problem.
I have not Modsecurity.

May you help please?

[studio4host]

you need to check open ports and/or countries blocked