The firewall implementation must employ cryptographic mechanisms to prevent unauthorized disclosure of information during transmission, unless otherwise protected by alternative physical measures.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
SRG-NET-000211-FW-000134	SRG-NET-000211-FW-000134	SRG-NET-000211-FW-000134_rule		Medium

Description
If the organization is relying on a commercial service provider for transmission services as a commodity item rather than a fully dedicated service for both internal and external connectivity, it may be more difficult to obtain the necessary assurances regarding the implementation of needed security controls for transmission confidentiality. When it is infeasible or impractical to obtain the necessary security controls and assurances of control effectiveness through appropriate contracting vehicles, the organization either implements appropriate compensating security controls or explicitly accepts the additional risk.

Description

If the organization is relying on a commercial service provider for transmission services as a commodity item rather than a fully dedicated service for both internal and external connectivity, it may be more difficult to obtain the necessary assurances regarding the implementation of needed security controls for transmission confidentiality. When it is infeasible or impractical to obtain the necessary security controls and assurances of control effectiveness through appropriate contracting vehicles, the organization either implements appropriate compensating security controls or explicitly accepts the additional risk.

STIG	Date
Firewall Security Requirements Guide	2012-12-10

Details

Check Text ( C-SRG-NET-000211-FW-000134_chk )
Open the management application. Inspect the encryption configuration. Verify encryption is automatically used for all data in transit. Verify the device is configured to negotiate a key exchange before full encryption takes place. Verify the device provides full encryption capability (AES or stronger). If the system is not configured to use cryptographic mechanisms protect information in transit, this is a finding.

Check Text ( C-SRG-NET-000211-FW-000134_chk )

Open the management application.
Inspect the encryption configuration.
Verify encryption is automatically used for all data in transit.
Verify the device is configured to negotiate a key exchange before full encryption takes place.
Verify the device provides full encryption capability (AES or stronger).

If the system is not configured to use cryptographic mechanisms protect information in transit, this is a finding.

Fix Text (F-SRG-NET-000211-FW-000134_fix)
Configure the device so encryption is automatically used for all data in transit. Configure the device to negotiate a key exchange before starting full encryption transmissions.