QUIZ 3 - Virtual Private Network (VPN)

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What is a Virtual Private Network?

A secure remote access connection across an intermediary network, often the Internet

Ways to keep VPN secure?

* Authentication * Encryption ~ Confidentiality ~ Integrity ~ Privacy Why not availability? due to the fact that it rides on ISP; Internet.

What are VPN Security Concerns

* Data exposure while in transit over the Internet ~VPN should use encryption * Vulnerable VPN endpoints ~Data entering or leaving * Compliance issues with security settings ~Oversight * Unrestricted access to network resources ~Strong authentication and authorization

What are VPN Components?

* Host VPN ~ software that allows a single host access to VPN services ~ sits on top of the OS * VPN appliance ~ Hardware that allows an entire network access to VPN services ~ Does not always need software for the host

What are VPN Protocols?

* IPSec* * PPTP * L2TP * SSL* * TLS* * Used for tunneling/encapsulation

What's the VPN evolution?

* It's the boom of the Internet * Networks VPN referred to tunneling connections across network links * No encryption services

What are VPN dos

* Match organizational and data privacy needs * Establish control ~ Components (software and hardware) ~ Conversations (endpoint connections) ~ Communications (network infrastructure)

What are VPN Limitations?

* No quality of service * Latency * Fragmentation * Traffic congestion * Dropped packets * Encrypted packets do not compress * Connectivity requires high availability * Bandwidth intensive

What does VPN offer?

* Remote access via the Internet to a secure private network * Protection of sensitive information crossing the public network * Low cost alternative to leased-line infrastructure * Remote access and remote control Encryption * Restricted communication to mobile users

What are the types of VPN design mechanisms?

* Trusted VPN ~ company control over network components e.g. router, switches and cables ~ controlled pathway transmission ~ Dedicated channels * True Private VPN ~ Ownership of all network infracstructure ~ Expensive * Secured VPN ~Encryption ~Protects against confidentiality and integrity ~No controlled pathway * Hybrid VPN ~Secure VPN over trusted VPN connections What can this method not ensure? ~ Transmission path

Types of VPN Protocols

* Tunneling protocols ~package packets within packets for secure transport * Transport protocols ~package payloads within packets * Encapsulating protocols ~ wrap around original passenger protocols * Carrier protocols ~carry the packaged VPN packets

What are VPN Deployment Benefits

* Vary from organization * High productivity * Flexibility * Scalability * Ease of administration * Reliability * Secured communications * Cost Savings

Difference between Remote Control and Remote Access

Remote Control is when local computer system takes over another computer over a network connection e.g using Remote desktop Protocol Remote Access is having access to network resources across a WAN link to connect to a geographically distant network


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