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Understanding VoIP: Security Concerns, Attacks, and Current Solutions

This overview delves into the complexities of Voice over Internet Protocol (VoIP), highlighting critical business concerns related to security, confidentiality, and data integrity. It discusses various security issues such as authenticity and availability while elucidating the risks posed by attacks like Denial of Service (DoS) and fraud. Current solutions, including VLAN isolation, effective traffic monitoring, and redundancy strategies, are explored to enhance VoIP systems against potential threats. Learn how to maintain high-quality communication while safeguarding your network.

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Understanding VoIP: Security Concerns, Attacks, and Current Solutions

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  1. MITP 458 : Information Security and Assurance VOIP Xeon GroupRohit BhatRyan HannanAlan MuiIrfan Siddiqui

  2. VOIP Overview - What is VOIP? Business Concern Security Issues Availability Attack example Current solution

  3. Overview • VOIP • Protocol optimized for the transmission of voice through the Internet or other packet switched networks • Often used abstractly to refer to the actual transmission of voice (rather than the protocol implementing it) • Also referred to as IP telephony, Internet telephony, voice over broadband, broadband telephony, and broadband phone.

  4. Business Concern • Highly complex communication • Critical communication should remain confidential • Data should remain accurate • Compliance issues along with privacy of users

  5. Security Issues • Confidentiality • Broadband pipe serving the VOIP and data center services must offer transmission confidentiality. • Authenticity • Access to the data servers must offer fool-proof authentication. • Integrity • Voice quality and data accuracy is critical to the success of service offerings. • Availability • VOIP and data center servers must have industry standard uptime.

  6. Availability • Why is it important • Emergency • Business • Sale • Communication • They type of attacks to VOIP • DoS Attack • Spit (Spam) • Fraud

  7. Attack example • DoS attack • The most serious threat to VoIP is a distributed denial of service (DoS) attack • Can effect any internet-connected device • Floods networks with spurious traffic or server requests. • Usually generated by machines that have been compromised by a virus or other malware • Servers grind to a halt and ignore/cant process new requests due to increased traffic

  8. Current Solution • vLAN • Isolate VoIP calls from other traffic in the network by creating a segregated vLAN • Also used to prioritize voice traffic and keep it up and running during a DoS attack. • Cons • Wasted bandwidth • Cost to implement and monitor

  9. Current Solution Effective monitoring • Monitoring geographic destinations of VoIP traffic • Sudden changes in the overall geographic distribution of network traffic originating from inside the VoIP network could indicate that unauthorized users are abusing the system to commit toll fraud Cons • Increased cost due to labor intensive monitoring • False positive readings

  10. Current solution Redundancy • Setup switches that will re-route the VOIP traffic when the main router/network is down. • In he event of a DOS attack all VOIP traffic will be switched to another network to prevent service interruption. Cons • Setup will require extra hardware and therefore more maintenance, cost, and labor • Load balancers, switches…

  11. VOIP Questions?

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