What is GPO which allow PSB firewall rule writing to domain computer firewall. I can't see PSB rules even firewall is activated ?
You are asking in a wrong place. Please, try here: https://community.f-secure.com/t5/Protection/bd-p/PSB.
Leave all Firewall settings in GPO as "unconfigured".F-Secure will administer, adjust and force all settings as needed.