English to Russian Tech/Engineering IT (Information Technology)

Перевожу стандарт безопасности данных индустрии платежных карт (PCI DSS).

Firewalls and routers are key components of the architecture that controls entry to and exit from the network.
These devices are software or hardware devices that block unwanted access and manage authorized access into and out of the network.
Without policies and procedures in place to document how staff should configure firewalls and routers, a business could easily lose its first line of defense in data-protection.
The policies and procedures will help to ensure that the organization’s first line of defense in the protection of its data remains strong.

Помогите, пожалуйста, перевести всё последнее предложение.