Title

The ALG providing intermediary services for remote access communications traffic must ensure inbound and outbound traffic is monitored for compliance with remote access security policies. (Cat II impact)

Discussion

Automated monitoring of remote access traffic allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by inspecting connection activities of remote access capabilities. Remote access methods include both unencrypted and encrypted traffic (e.g., web portals, web content filter, TLS and webmail). With inbound TLS inspection, the traffic must be inspected prior to being allowed on the enclave's web servers hosting TLS or HTTPS applications. With outbound traffic inspection, traffic must be inspected prior to being forwarded to destinations outside of the enclave, such as external email traffic.

Check Content

If the ALG does not serve as an intermediary for remote access traffic (e.g., web content filter, TLS and webmail), this is not applicable. Verify the ALG is configured to inspect traffic or forward to a monitoring device for inspection prior to forwarding to inbound or outbound destinations. Verify that the communications package is either forwarded or disallowed and that the process does not alter the original data payload that is forwarded to the destination application. If the ALG does not ensure inbound and outbound traffic is monitored for compliance with remote access security policies, this is a finding.

Fix Text

If intermediary services for remote access communications traffic are provided, configure the ALG to either provide content inspection for inbound and outbound traffic or route the traffic to be inspected for compliance with remote access security policies.

Additional Identifiers

Rule ID: SV-68599r1_rule

Vulnerability ID: V-54353

Group Title: SRG-NET-000061-ALG-000009

Expert Comments

CCIs tied to check.

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