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Securing SIP Networks
Securing SIP Networks course description
A hands-on course covering SIP security. It is assumed that delegates already know SIP as this course focuses purely on the security issues in SIP IP telephony networks. Hands-on practicals follow each major theory session and include use of various SIP security tools such as vomit, sipp, sipsak and sivus amongst others.

Who will benefit?
Technical staff working with SIP.
Technical security staff.

Securing SIP Networks prerequisites
SIP for engineers.

Securing SIP Networks course objectives
By the end of the course delegates will be able to:
  • Secure SIP networks.
  • Use various SIP security tools.

Duration: 2 days


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Securing SIP Networks course contents

SIP review
SIP infrastructure and entities, example SIP session. Hands on: Simple SIP network with and without authentication.

SIP security attacks
DOS attacks, infrastructure attacks, eavesdropping, spoofing, replay, message integrity. Hands on: Basic SIP packet capture, infrastructure attacks.

SIP tools
SIP packet creation: Sivus, SIPsak, PROTOS, SFTF, SIP bomber, SIPp, Seagull, Nastysip. SIP packet generators: SIPNess, NetDude. Monitoring: Wireshark, Cain & Abel, Vomit, Oreka, VoiPong. Scripts and tools: SIP-Fun, Skora.net, kphone-ddos, sip-scan, sip-kill, sip-redirectrtp. Health of different tools. Hands on: Generating SIP packets, rebuilding conversations from captured packets, password cracking.

VPNs and SIP
IPSec, AH, ESP, transport mode, tunnel mode, Pre Shared Keys, Public keys. Hands on: SIP calls over IPSec.

Secure SIP signaling
SIP relationship with HTTP, Deprecated HTTP 1.0 basic authentication, HTTP 1.1 Digest authentication, S/MIME, SIPS, SIPS URI, TLS, DTLS, PKI infrastructures. Hands on: SIP with TLS.

Secure media streams
SRTP, features, packet format, default encryption, default authentication, key distribution. S/MIME, MIKEY, SDP security descriptions. SIP security agreements. Hands on: Analysing SRTP packets.

Firewalls
NAT traversal. Impact of firewall on infrastructure attacks. TLS and firewalls. SIP specific firewalls. Hands on: SIP calls through a firewall.