Procedural Security Guidelines

Deploy appropriate physical controls. This is especially important in a VoIP environment. Unless the voice traffic is encrypted, anyone with physical access to the LAN could potentially tap into telephone conversations. Even when encryption is used, physical access to VoIP servers and gateways may allow an attacker to perform traffic analysis to some extent, depending on configuration. Organizations should, therefore, ensure that adequate physical security is in place to restrict access to VoIP network components. Furthermore, additional security measures such as authentication, address filtering, and alarms for notifying the administrator when devices are disconnected can mitigate the risks involved in physical security.

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