The ALG providing user access control intermediary services must be configured with a pre-established trust relationship and mechanisms with appropriate authorities (e.g., Active Directory or AAA server) which validate user account access authorizations and privileges.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-204946	SRG-NET-000138	SRG-NET-000138-ALG-000088	SV-204946r395973_rule	2024-12-04	2

Description
User account and privilege validation must be centralized in order to prevent unauthorized access using changed or revoked privileges. ALGs can implement functions such as traffic filtering, authentication, access, and authorization functions based on computer and user privileges. However, the directory service (e.g., Active Directory or LDAP) must not be installed on the ALG, particularly if the gateway resides on the untrusted zone of the Enclave.

Description

User account and privilege validation must be centralized in order to prevent unauthorized access using changed or revoked privileges. ALGs can implement functions such as traffic filtering, authentication, access, and authorization functions based on computer and user privileges. However, the directory service (e.g., Active Directory or LDAP) must not be installed on the ALG, particularly if the gateway resides on the untrusted zone of the Enclave.

ℹ️ Check
If the ALG does not provide user access control intermediary services, this is not applicable. Verify the ALG is configured with a pre-established trust relationship and mechanisms with appropriate authorities which validate each user access authorization and privileges. If the ALG is not configured with a pre-established trust relationship and mechanisms with appropriate authorities which validate each user access authorization and privileges, this is a finding.

ℹ️ Check

If the ALG does not provide user access control intermediary services, this is not applicable. Verify the ALG is configured with a pre-established trust relationship and mechanisms with appropriate authorities which validate each user access authorization and privileges. If the ALG is not configured with a pre-established trust relationship and mechanisms with appropriate authorities which validate each user access authorization and privileges, this is a finding.

✔️ Fix
If user access control intermediary services are provided, configure the ALG with a pre-established trust relationship and mechanisms with appropriate authorities which validate each user access authorization and privileges.