VoIP Security Training
| Commitment | 4 days, 7-8 hours a day. |
| Language | English |
| How To Pass | Pass all graded assignments to complete the course. |
| User Ratings | Average User Rating 4.8 See what learners said |
| Price | CALL |
| Delivery Options | Instructor-Led Onsite, Online, and Classroom Live |
Course Overview
VoIP security training Course – Hands-on
Security is a concern for every company at every level. The wide adoption of VoIP and new protocol standards has introduced many new issues. For most enterprises, the adoption of VoIP is a migration path – a fact that contributes to increased complexity for the IT security personal and network administrators. VoIP introduces new systems, vendors, applications, servers, operating systems, and the like. The introduction of media gateways to handle traditional telephony converted to VoIP on the data network introduces security management challenges on the network.
If not using media gateways, organizations are adopting VoIP providers that carry traffic on an IP network connection. This VoIP security training course will help you understand the issues of VoIP security on all levels of the network. We will follow the OSI model to ensure that all levels are covered. We will begin by learning the technical concepts related to network security. We will then study the protocols such as SIP and H.323 on the IP network. We will conclude with a discussion of the policies and procedures that enhance VoIP security.
VoIP security Training Course – Customize it
- Are you involved with commercial or military deployment planning for VoIP? Depending on your background and job, we can tailor the VoIP security Training course to focus on the technical or managerial issues.
- Are you a network engineer or administrator who would like to “fill in the holes” and catch up with the state-of-the-art of security planning? Let us know so we can focus on the areas that interest you the most.
- Are you a VoIP network or application installer who would like to learn the security concepts and theory that underlie your craft? We can focus on the tools and techniques that will help you become more “tech savvy” on VoIP security issues.
- Are you a manager, executive, or sales person whose work involves VoIP security systems? If so, we can emphasize those parts of the VoIP security Training course that deal with policy management, vendor audits, and procedural security issues.
VoIP security Training Course – Audience/Target Group
The target audience for this VoIP security training course:
- Network security planning teams, network administrators, IT and telecom engineers, and IT security management. This VoIP security Training course is also beneficial for the homeland security community and crime prevention/investigation officers.
VoIP Training Course – Class Prerequisites
- VoIP: Protocols, Design, and Implementation Training
- State-of-the-art of VoIP Technology for Professionals, Managers, and Executives Training
Before taking this course, you should have completed either of the two courses listed above or possess equivalent experience.
VoIP security Training Course – Objectives:
Upon completing this VoIP security training course, learners will be able to meet these objectives:
- Understand VoIP
- Learn VoIP security issues
- Identify VoIP security features
- Understand the threats and security holes with VoIP call control protocols H.323, SIP, and MGCP
- Identify SIP Security Features and learn how to configure and administer those features
- Learn H.323 security issues including Port usage risk, firewall inspection, and NAT configurations
- Examine VoIP best practices to support risk mitigation
- Examine VoIP management tools and best practices to support risk mitigation
- Learn how NAT and Firewalls impact call setup, media streams, latency, and application level gateway
- Understand SIP NAT Traversal
- Examine how to overcome NAT issues using STUN, TURN, and ICE
- Examine cryptographic protocols, Datagram Transport Layer Security (DTLS) protocol, Secure Real-time Transport Protocol (SRTP) protocol and Session Description Protocol Security Descriptions (SDES) protocol
Course Syllabus
VoIP Security Training – Course Content
Overview of Voice over IP (VoIP)
- Traditional Telephony Systems
- VoIP network architecture
- VoIP protocols
- VoIP signaling, media and supporting protocols
- RTP, RTCP, SIP, H.323, MGCP, MEGACO/H.248
- VoIP support protocols
- DNS, DHCP, NTP, HTTP, SNMP, and TFTP
- VoIP proprietary protocols
- Cisco Skinny (SCCP), IAX2, and Skype
- VoIP media protocols
- RTP and RTCP
- RTP/RTCP message format
- VoIP Security Threat Overview
- Voice Network Designs
- VPN (Virtual Private Networks) and VoIP
- Types of attacks
- Denial of Service (DOS)
- TCP/IP insecurity
- Eavesdropping
- Sniffing/Snooping/Wiretapping
- Quality of Service Issues
- Quality of Service Implications for Security
- Best Practices
VoIP security issues
- VOIP Risks, Threats, and Vulnerabilities
- Confidentiality and Privacy
- Integrity Issues
- Availability and Denial of Service
- VoIP Issues with Firewalls & NAT
- Proxy Servers
- H.323 Security Issues
- Encryption Issues and Performance
- Existing Security Features within the SIP Protocol
- Authentication of Signaling Data using HTTP Digest Authentication
- S/MIME Usage within SIP
- Confidentiality of Media Data
- TLS usage within SIP
- IPSEC usage within SIP
- Security Enhancements for SIP
- SIP Security Issues
- Gateway Decomposition
- MGCP/MEGACO
- Security Considerations
- Overcoming NAT Issues
- NAT/Firewall traversal
- VoIP scenarios through protocols like STUN, TURN or ICE, or security gateways
- Application-Layer Gateways (ALG’s)
- Session Border Controllers (SBC’s)
Secure VoIP protocols
- VLANs, port security controls, and 802.1x/EAP
- SIP MD5 authentication, Secure SIP (SIPS or SIP/TLS)
- SIP over DTLS, S/MIME
- SIP over IPSec, and SIP identity
- Media protocols
- SRTP, SDES, secure call recording, and RTP over IPSec
- Key-exchange protocols
- MIKEY, SDescriptions, ZRTP, and DTLS-SRTP
- Man-in-the-Middle (MitM), port scanning, and banner grabbing
- ARP spoofing and MitM attacks
- VoIP signaling attacks: (SIP-based)
- VoIP Media Attacks: (RTP-based)
- RTP eavesdropping
- Voice conversations and DTMF tones
- RTP recording
- RTP manipulation
- Replacing, inserting, and mixing audio in standard and MitM scenarios
- Signaling plane
- Call setup and tear down
- Gateways and endpoints
- Management plane
VoIP Security Training – Dealing with Attacks
- Integrity, Confidentiality, Authentication and Non-repudiation
- Eavesdropping
- Jamming
- Active modification
- Toll stealing
- DoS/DDoS Attacks
- Attack Mitigation
- Unauthorized Access
- Toll Fraud
- DoS and DDoS
- IP Spoofing
- Packet Sniffers – Interception and mitigation
- Caller Identity Spoofing
- Repudiation
- Application Layer Attack Mitigation
- Secure VoIP protocols
- DTLS, S/MIME, SIP over IPSec, and SIP identity
- VoIP supporting infrastructure
- VoIP-related overview, attacks and countermeasures for DNS, DHCP, TFTP, HTTP, SNMP, ARP
Firewalls, Address Translation, and Call Establishment
- Firewalls
- Stateful Firewalls
- VOIP specific Firewall Needs
- Network Address Translation
- Firewalls, NATs, and VOIP Issues
- Incoming Calls
- Effects on QoS
- Firewalls and NATs
- Call Setup Considerations with NATs and Firewalls
- Application Level Gateways
- Middlebox Solutions
- Session Border Controllers
- Mechanisms to solve the NAT problem
- VPN and Firewalls
- Dynamic Port Assignment
VoIP Network Security Design
- VoIP Security Issues
- Sources of Attacks
- Sources of attacks
- Types of attacks
- Message Integrity
- Mitigate security threats
- Operating System Level Security
- Authentication
- Operating System Security
- Network Access Security
- Stateful Firewalls
- Application Security
- Physical Security
- Hardware Access
- Biometrics
- Human Engineering
- Tools
- Low Level Security
- Network Access Security
- Application Security
- Physical Security
- Protocol Security
- Attack Mitigation
Overview of Cryptographic Protocols
- Secure Sockets Layer (SSL)
- Public keys and private keys
- SSL Certificates
- Protection for confidential data
- Transport Layer Security (TLS)
- Symmetric cryptography for privacy
- Keyed message authentication code for message reliability
- Cryptographic Attributes
- HMAC and the Pseudorandom Function
- Application Data Protocol
VoIP Security Training – Encryption & IPSEC
- IPsec
- The Role of IPsec in VOIP
- Local VPN Tunnels
- Difficulties Arising from VOIPsec
- Encryption / Decryption Latency
- Scheduling and the Lack of QoS in the Crypto-Engine
- Expanded Packet Size
- IPsec and NAT Incompatibility
- Solutions to the VOIPsec Issues
- Encryption at the End Points
- Secure Real Time Protocol (SRTP)
- Key Management for SRTP – MIKEY
- Better Scheduling Schemes
- Compression of Packet Size
- Resolving NAT/IPsec Incompatibilities
- Planning for VOIP Deployment
SIP NAT Traversal
- SIP NAT Traversal
- One-Way Voice Results
- Full Cone NAT
- IP Address Restricted NAT
- Port Restricted NAT
- Symmetric NAT
- Simple Traversal of UDP through NATs
- Traversal Using Relay NAT
- NAT with Embedded SIP Proxy
Overview of STUN (Session Traversal Utilities for NAT)
- Session Traversal Utilities for NAT (STUN) Protocol
- Issues of video and voice applications and NAT
- STUN as a client-server protocol
- RFC 3489 and RFC 5389
- STUN Message Structure
- FINGERPRINT Mechanism
- Authentication and Message-Integrity Mechanisms
- STUN Usages
- STUN Attributes
- STUN Security Considerations
- Attacks against the Protocol
- Attacks Affecting the Usage
- Current state
VoIP Security Training – Overview of TURN (Traversal Using Relay NAT)
- Relay Extensions to Session Traversal Utilities for NAT (STUN)
- RFC 5766
- Simple example of what TURN does
- Similar Techniques
- Potential issues
- Technical details
- Packet format
- Example of connection using TURN
- Current state
Datagram Transport Layer Security (DTLS) protocol
- Overview of DTLS
- Loss-Insensitive Messaging
- Providing Reliability for Handshake
- Differences from TLS
- The DTLS Handshake Protocol
- Security Considerations
- Secure Real-time Transport Protocol (SRTP) protocol
- SRTP Framework
- SRTP Cryptographic Contexts
- SRTP Packet Processing
- Secure RTCP
- Pre-Defined Cryptographic Transforms
- Encryption
- AES in Counter Mode
- AES in f8-mode
- NULL Cipher
- Message Authentication and Integrity
- HMAC-SHA1
- Key Derivation
- Key Derivation Algorithm
- SRTCP Key Derivation
- AES-CM PRF
- Default and mandatory-to-implement Transforms
- Encryption: AES-CM and NULL
- Message Authentication/Integrity: HMAC-SHA1
- Key Derivation: AES-CM PRF
Session Description Protocol Security Descriptions (SDES) protocol
- Keys in the SDP attachment of a SIP message
- Using TLS transport layer or S/MIME
- SDP Crypto Attribute and Parameters
- General Use of the crypto Attribute
- SRTP Security Descriptions
- SRTP Key Parameter
- Crypto-Suites
- AES_CM_128_HMAC_SHA1_80
- AES_CM_128_HMAC_SHA1_32
- F8_128_HMAC_SHA1_80
- Session Parameters
- SRTP Crypto Context Initialization
- SRTP-Specific Use of the Crypto Attribute
VoIP Security and Audit Policies
- Policy Creation
- Policy Conformance
- Incident Handling
- Auditing Standards and Certifications
- Basic Auditing and Assessing Strategies
- The Six-Step Audit Process
- VoIP Security Training Course Wrap-up
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