How to Configure L2TP over IPsec using Freeradius on Ubuntu

Layer 2 tunneling protocol (L2TP) with IPsec  is used to ensure end-to-end encryption because L2TP does not support security features. OpenSwan tool is used to establish IPsec tunnel which will be compiled on Ubuntu distribution. The authentication security feature is [...]

How to Setup Public Key Infrastructure (PKI) using OpenSSH

Secure shell, or ssh, is a cryptographic (encrypted) network protocol operating at layer 7 of the OSI Model to allow remote login and other network services to operate securely over an unsecured network. SSH provides a secure channel over an unsecured network in a client-server architecture, connecting an SSH client application with an SSH [...]