What Is Linux ?
LinuxLinux was written in 1991 by a man named Linus Torvalds, a computer science student. At that time, many used Unix-based operating systems. When Linus...
What Is Firewall ?
A firewall is a software utility or hardware device that acts as a filter for data entering or leaving a network or computer. You could think of a firewall as a...
Dead Peer Detection on IPsec VPN ( DPD )
Dead Peer Detection (DPD) is the method to detect the aliveness of an IPsec connection. During IPsec tunnel creation, VPN peers will negotiate to decide...