If you did create those file linked on second topic and set them with execution permission (chmod 700 file) than BFM is configured, on directadmin panel you should have the link to the csf configuration (at admin level), you need to open it, check all the values and opened port to match your needs (important the DA port and SSH port to dont get kicked out) and disable the test mode, untill you dont disable test mode csf will not be really active.
Regards