Title

The ALG must only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations. (Cat II impact)

Discussion

Unrestricted traffic may contain malicious traffic which poses a threat to an enclave or to other connected networks. Additionally, unrestricted traffic may transit a network, which uses bandwidth and other resources. Access control policies and access control lists implemented on devices that control the flow of network traffic (e.g., application level firewalls and Web content filters), ensure the flow of traffic is only allowed from authorized sources to authorized destinations. Networks with different levels of trust (e.g., the Internet or CDS) must be kept separate.

Check Content

Verify the ALG only allows incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations. If the ALG allows incoming communications from unauthorized sources routed to unauthorized destinations, this is a finding.

Fix Text

Configure the ALG to only allow incoming communications from organization-defined authorized sources routed to organization-defined authorized destinations.

Additional Identifiers

Rule ID: SV-68883r1_rule

Vulnerability ID: V-54637

Group Title: SRG-NET-000364-ALG-000122

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.