Authorized Self-Study Guide Cisco IP Telephony (CIPT), Second Edition

Chapter 23. Hardening the IP Phone

<feature><title></title>

This chapter covers the following topics:

• Identifying potential threats against IP phones and the attack tool or method

• Explaining how signed firmware images prevent rogue or incorrect images from being placed on the IP phone

• Configuring parameters in the Phone Configuration window of Cisco CallManager Administration to harden the IP phone

• Explaining how disabling the PC port, the Settings button, and web access help secure the IP phone

• Explaining how, by ignoring gratuitous ARP, the IP phone can help prevent a man-in-the-middle attack

• Explaining how blocking the PC from accessing the voice ...