Yes, the given statement is true, as the bastion host basically require two individual firewall that connect with the internal network and perimeter network by using the perimeter configuration.
Perimeter network basically isolate the the bastion host from the internal network. Bastion host is the serve as the host that connect with the external world. As, perimeter network is one of the type of the firewall network system.
Therefore, the internal network and the perimeter network basically connect with the firewall by using bastion host.
