Saturday, April 2, 2011

Linux Host-to-Host IPSEC

Sometimes, you want to encrypt all IP traffic between two Linux hosts. An easy way to do this with Red Hat Linux is to use IPSEC. While there are many applications which are encrypted, such as secure shell or even transport layer security and secure sockets layer over usually-unencrypted applications, IPSEC works at a lower level. IPSEC therefore can work regardless of the application and encrypts all IP communication.