Not sure but it looks like the following:
HFSQL works on a server through two SERVICES: hfsql and Manta
By default, these services are probably executed but the user 'system' (check the xact name in the services itself), and system by default, does not have rights on network access, for security reasons...
So, if I'm correct, the solution is either to add this permission to the system user, or to use a different user, one with network access permissions, to run hfsql and manta