Re: Types of VPNs
From: Barry Irwin (bvi_at_itouchlabs.com)
Date: 05/05/03
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- In reply to: Imran K: "Types of VPNs"
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To: <ikhan@eudoramail.com>, <security-basics@securityfocus.com> Date: Mon, 5 May 2003 07:54:06 +0200
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,
Barry
-- Barry Irwin bvi@itouchlabs.com Tel: +27214875178 Systems Administrator: Networks And Security iTouch Technology iTouch TAS http://www.itouchlabs.com Mobile: +27824457210 ----- Original Message ----- From: "Imran K" <ikhan@eudoramail.com> To: <security-basics@securityfocus.com> Sent: Thursday, May 01, 2003 6:59 PM Subject: Types of VPNs > Greetings, > > I am looking for conceptual pointers about VPNs. > > Things like, > > (1)Types of VPNs, (2) Difference in both types of tunnels (AH/ESP), (3) 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 > > Cheers, > > I > > > > > Need a new email address that people can remember > Check out the new EudoraMail at > http://www.eudoramail.com > > -------------------------------------------------------------------------- - > 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 > -------------------------------------------------------------------------- -- > > > > --------------------------------------------------------------------------- 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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