Re: Types of VPNs

Morning,

you should be ble to fins answers to these with a quick hunt round google. anywhay here are some answers.

1 Types of VPNs,
A VPN simply encapsulates pakets within other packets for transport over public network. Common technologies used are IPSEC, PPTP, L2TP, GRE, IPIP

2 Difference in both types of tunnels (AH/ESP), These only apply to IPSEC VPNs.
AH stands for authenticated header. using this, a packet is encapsulated within another packet that contains a cryptographic checksum. Packet payload is NOT encrypted, but it can be detected whether the packet was changed in transit.
ESP - Encrypted Security Payload. The packet is encrypted, and then encapsulated, providing for both privacy and authentication of the packet integrity

3 difference in implentation and their behavior in a production environment for both types of VPNs
Welll this depends what you are wanting to achieve, adn what technology you use.

4 sngle tunnel v split tunnel and can this be implemented in both type of tunnels?
With regards to IPSEC, as far as I amn aware the ability to do this would depend on the software used to implement the tunnel. The protocol itself does not impose any restrictions on this.

Regards,

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Barry

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Barry Irwin         bvi@itouchlabs.com                    Tel:
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----- Original Message -----
From: "Imran K" 
To: 
Sent: Thursday, May 01, 2003 6:59 PM
Subject: Types of VPNs

> Greetings,


difference in implentation and their behavior in a production environment
for both types of VPNs, (4) Single tunnel v split tunnel and can this be
implemented in both type of tunnels?

>

> If some out there could give me some pointers that will be very helpful


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>

>

>




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FastTrain has your solution for a great CISSP Boot Camp. The industry's most 
recognized corporate security certification track, provides a comprehensive 
prospectus based upon the core principle concepts of security. This ALL INCLUSIVE curriculum utilizes lectures, case studies and true hands-on utilization 
of pertinent security tools. For a limited time you can enter for a chance 
to win one of the latest technological innovations, the SEGWAY HT. 
Log onto 
http://www.securityfocus.com/FastTrain-security-basics 
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