By Peter Thermos
In Securing VoIP Networks, best specialists systematically evaluate the protection dangers and vulnerabilities linked to VoIP networks and supply confirmed, distinctive concepts for securing them. Drawing on case reports from their very own fieldwork, the authors tackle VoIP protection from the point of view of real-world community implementers, managers, and safeguard experts. The authors determine key threats to VoIP networks, together with eavesdropping, unauthorized entry, denial of carrier, masquerading, and fraud; and assessment vulnerabilities in protocol layout, community structure, software program, and method configuration that position networks in danger. They talk about the benefits and tradeoffs linked to security mechanisms outfitted into SIP, SRTP, and different VoIP protocols; and assessment key administration ideas comparable to MIKEY and ZRTP. subsequent, they current an entire safety framework for firm VoIP networks, and supply specific architectural assistance for either provider prone and company clients.
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Additional resources for Securing VoIP Networks: Threats, Vulnerabilities, Countermeasures
VoIP in Peer-to-Peer IP Telephony The simplest architecture for VoIP consists of a direct connection between VoIP phones, a peer-to-peer connection. Due to popular and free implementations this is also the most common VoIP setup. Peer-to-peer (P2P) communication networks do not rely on the existence of centralized servers. A P2P network transfers the work of the servers to the end points Architectures 33 3. org/. 4. P2P is a standardization effort in progress by the IETF. org. 5. A. com. 6. Note that the address space limitation exists in IPv4; IPv6 is supposed to ﬁx this problem by extending the address space.
Org. CIA is a mnemonic for conﬁdentiality, integrity, and availability. Risk Analysis for VoIP 19 1. INTRODUCTION Conﬁdential data can also reside in the client software. Examples of conﬁdential data include encryption keys, identity, presence, and location data. Analyzing and understanding how data traverses the network can identify critical weaknesses in the design. The second set of requirements relates to data integrity. Besides integrity of the data exchanged between VoIP network elements, the data that is stored in end devices may need to support data integrity.
25 has become less prevalent and mainly used to maintain backward compatibility with “legacy” systems. 1. The PSTN network relies on a model of trusted neighbors. The PSTN has been maintained as a closed network, where access is limited to carriers and service providers. Access to route trafﬁc within the PSTN requires a great ﬁnancial investment and resources including equipment and personnel. Therefore, access to the PSTN core network has traditionally been protected by price, because costs can exceed hundreds of thousands of dollars per month.