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IPsec VPN - UntangleWiki.
5.5 Can I use IPsec on a server that uses DHCP to get its external address? 5.6 Does IPsec traffic go through other Untangle applications? 5.7 How do I connect IPsec between Untangle and my IPsec Device? About IPsec VPN.
What is IPsec VPN? Webopedia Definition.
Short for IP Sec urity, a set of protocols developed by the IETF to support secure exchange of packets at the IP layer. IPsec has been deployed widely to implement Virtual Private Networks VPNs. IPsec Encryption Modes. IPsec supports two encryption modes: Transport and Tunnel.
An Illustrated Guide to IPsec.
A Cryptographic Evaluation of IPsec, by Bruce Schneier and Niels Ferguson. An interesting paper on the security of IPsec, whose main point is that IPsec is far too complex to ever really be secure something which has crossed our minds as well.
The TCP/IP Guide IP Security IPSec Protocols.
I describe security associations and related constructs such as the Security Parameter Index SPI. The last three topics cover the three main IPSec protocols: IPSec Authentication Header AH, IPSec Encapsulating Security Payload ESP and the IPSec Internet Key Exchange IKE.
IPsec - Wikipedia.
IPsec can protect data flows between a pair of hosts host-to-host between a pair of security gateways network-to-network or between a security gateway and a host network-to-host 1 IPsec uses cryptographic security services to protect communications over Internet Protocol IP networks.

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