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Chapter 3

Misconfiguration Begat Toll Fraud and Other VoIP Mischief

Abstract

This chapter identifies basic configuration flaws commonly found within the typical VoIP implementation.

Keywords

VoIP; PBX configuration; Misconfiguration of VoIP system; VoIP configuration mistakes

Common Misconfigurations

Long Distance, Premium-Rate Telephone Numbers, and International

Direct Inward System Access

Call Forwarding

Weak or Null Passwords

Security Best Practices

Dialing Restrictions

Restrict Premium Features

Password/PIN Strength

Phone Bill Analysis

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