The site's enclave boundary protection must route commercial VoIP traffic via a local Media Gateway (MG) connected to a commercial service provider using PRI, CAS, or POTS analog trunks.
An XCCDF Rule
Description
<VulnDiscussion>There are several reasons VVoIP system access to local voice services must use a locally implemented MG connected to commercial voice services, including: - The implementation or receipt of commercial VoIP service provides a path to the Internet. These "back doors" into the local network place the DISN at risk from exploitation. Such connections must be specifically approved under CJCSI 6211.02C and DODI 4640.14. Such connections must also meet the requirements in the Network Infrastructure STIG for an "Approved Gateway". This generally means that a full boundary architecture must be implemented. - A PRI or CAS trunk is required because the DSN is not permitted to exchange SS7 signaling with the PSTN. Doing so would place the DOD's SS7 network at risk. - Local access is necessary to support Fire and Emergency Services (FES) calls.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-259913r948759_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
Ensure all VVoIP system access to/from commercial dialup services (voice, video, fax, data) is via a locally implemented MG using a PRI, CAS, or POTS analog trunk to a commercial service provider.
NOTE: Trunks that support SS7 signaling and SS7-based signaling between a DOD network and a non DOD network are prohibited.