October 25, 2005
VoIP security
Since VoIP applications are exposed to the same threats as other IP services, they can also be protected using the same techniques that are used for the other services.
Hijacking of calls can be prevented by setting up sessions for SIP-supported VoIP. A firewall with a Simple Traversal of User Datagram Protocol and network address translators can be used to enable phones to route calls via an external server between the SIP end points. The external server, which can be a registration or a session server, is used for the authentication of the phones.
Along with data security, privacy features high on the list of concerns. This is because unlike PSTN phones, IP phone-tappers do not require a physical connection by means of a wire. Calls that traverse over the Internet can be captured and analyzed with the help of a protocol analyzer.
--
Did you enjoy this post?
