Voice over IP security: A learning guide

Spam, eavesdropping and toll fraud may not pose a significant threat to your customers' voice over IP networks today, but as an increasing number of organizations adopt VoIP and extend IP telephony to their customers and partners, security measures will become a requirement. Such safeguards will go beyond the underlying network to address VoIP-specific vulnerabilities. This learning guide is designed to provide value-added resellers (VARs) and systems integrators with a basic framework for addressing these weaknesses before malicious intruders take advantage of them.

• Tip: VoIP network security offers new challenges for channel professionals
  Voice over IP requires layers of security -- similar to the underlying data network. This tip describes the VoIP security onion and the type of protections required at each layer.
• Tip: VoIP security best practices
  There are three major security concerns regarding VoIP -- lack of authentication, data exposure and unwanted traffic -- which can be mitigated with the best practices and baseline security controls outlined in this tip.
• Guide: VoIP protocols
  VoIP presents new targets for attacks, especially through the two standard VoIP protocols: H-323 and SIP.
• Tip: VoIP security: Encryption
  VoIP security must gain effectiveness before companies will invest. Here are some best practices for accomplishing this.
• Tip: VoIP security: Zfone
  Zfone offers a VoIP security and encryption solution in an industry that has thus far been slow to offer one.
• Tip: Signal encryption in VoIP
  Signal encryption is an important security measure VARs and systems integrators need to consider when designing and securing their customer's VoIP network.
• Tip: A secure approach to convergence
  There are three critical security elements of a converged network. This tip describes those elements and strategies for addressing them.
• Quiz and Chapter download: Cisco Unified CallManager
  This chapter will help resellers fortify Cisco's Unified CallManager (CCM) with best practices provided by Cisco, and ensure that their customer's VoIP deployment is hardened to the most common attacks.

For more information, visit our voice over IP security or network protocol security topic centers.