The Cisco ASA must be configured to restrict VPN traffic according to organization-defined filtering rules.
An XCCDF Rule
Description
<VulnDiscussion>Remote access devices (such as those providing remote access to network devices and information systems) that lack automated capabilities increase risk and make remote user access management difficult at best. Remote access is access to DoD non-public information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Automated monitoring of remote access sessions allows organizations to detect cyberattacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities from a variety of information system components (e.g., servers, workstations, notebook computers, smart phones, and tablets).</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-239854r665848_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Step 1: Configure the ACL to restrict VPN traffic.
ASA(config)# access-list RESTRICT_VPN extended permit tcp 10.0.0.0 255.255.255. host 192.168.1.12 eq http
ASA(config)# access-list RESTRICT_VPN extended permit tcp 10.0.0.0 255.255.255. host 192.168.1.13 eq smtp
ASA(config)# access-list RESTRICT_VPN extended permit tcp 10.0.0.0 255.255.255. host 192.168.1.14 eq ftp
ASA(config)# access-list RESTRICT_VPN extended permit tcp 10.0.0.0 255.255.255. host 192.168.1.14 eq ftp-data