VoIP pentest and SIP hacking

Learn VoIP security and Ethical Hacking for VoIP Systems [Advanced Series VOD]

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Welcome to the VoIP hacking course with one hour coaching


  • At the end of this training you should be capable to:
    • Evaluate how safe are your systems and take measures to protect your VoIP infrastructure.
    • Test the security of your systems
    • Prepare for a pentest in a VoIP infrastructure

Who is this training for:

  • ITSP staff responsible for security
  • PBX administrators
  • Any professional concerned about VoIP security

How this training is delivered

  • Self-paced
  • One hour of coaching when bought individually (For subscription plans coaching is optional)
  • Video Lectures: 41, Time: 3.5 hours


voip.school website, Full HD

What is the content:

  • Ethical hacking principles
  • Relevance of VoIP Security
    • Denial of Service
    • Telephony Denial of Service
    • Internet Revenue Share Fraud
    • SIP signaling attacks
    • Eavesdropping and Man in the Middle
  • Reconnaissance of VoIP Systems
    • Google Dorks
    • Shodan
    • Sipvicious
  • Enumeration of targets and extensions
    • Sipvicious
  • Diverting traffic
    • Using sipsak to build signaling attacks
  • Registration and DNS Poisoning
    • Diverting unauthorized traffic to gateways
  • Denial of Service Attacks against VoIP
    • Flooding and Fuzzying
  • Telephony Denial of Service
    • Filling emergency lines
  • Man in the Middle Attack
    • Capturing unauthorized RTP traffic
  • Eavesdropping
    • Using unified communication sniffer to eavesdrop calls in a user port of the switch

Your Instructor

Flavio E. Goncalves
Flavio E. Goncalves

My name is Flavio E. Goncalves, I have been an Engineer since 1988. As any engineer we are in the world to build things. My personal mission is to have a positive impact in the life of other people and companies.

22+ years of experience in Voice over IP systems, 10000+ students on Udemy

He started as a Network and Database Administrator in 1989 and in the technical carrier got the following certificates

  • Novell Master CNE in 1993
  • Microsoft Certified Systems Engineer in 1995
  • Cisco CCNP, CCDP, CCSP and CCIE written
  • Asterisk dCAP in 2006
  • OpenSIPS Instructor and creator of the OpenSIPS Bootcamp and OpenSIPS Certified Professional

He has founded four companies:

  • V.Office, Network Systems Integrator, Since 1996
  • SipPulse, Communication Systems, Since 2010
  • Api4Com, APIs for communication, Since 2018
  • WeHostVoIP, Hosting VoIP Application, Since 2020

In the VoIP School the objective is to build a community of people related to VoIP, Instructors and Students in the same place. With the teachable interface, the teaching model can be a lot better. We hope to offer more web-conference training and coaching.

Course Curriculum

Frequently Asked Questions

When does the course start and finish?
The course starts now and never ends! It is a completely self-paced online course - you decide when you start and when you finish.
How long do I have access to the course?
How does lifetime access sound? After enrolling, you have unlimited access to this course for as long as you like - across any and all devices you own.
What if I am unhappy with the course?
We would never want you to be unhappy! If you are unsatisfied with your purchase, contact us in the first 30 days and we will give you a full refund.

Get started now!