What Is a VPN? - Virtual Private Network

there are many different reasons why you

may want to use a VPN maybe you want to

hide your IP address to download a movie

from The Pirate Bay or to bypass

internet censorship that is based on

gear location for example some Netflix

movies are only available in certain

countries also if you're in the public

place you might want to use a VPN for

security reasons to avoid men in the

middle attacks when connecting to the

internet using open Wi-Fi access points

it is also Irreplaceable for remote work

or for some who need to connect to the

cloud and clean the logs on the server

because they got a pager detailer that

the disk is almost full it all falls

under client to site VPN connections

when you need to connect an individual

device such as a laptop or mobile phone

to the company Network VPN can also be

used to connect multiple private

networks for example a company may want

to use a VPN to connect on-premise data

center with one of the public clouds

such as AWS in this scenario all the

nodes in both networks can communicate

with each other we call this type as

side to side VPN connection let's see

how it works based on the openvpn

example and a typical home network to

connect your house to the internet you

would sign a contract with one of the

internet providers such as Comcast then

use either their modem and router or you

can get your own that router creates a

private local network in your house to

connect to that router you can use a

Wi-Fi or Internet cable for example when

you connect one of your devices to the

Wi-Fi each of them gets a private IP

address received by the DHCP server

installed on the router it also

configures your router as a default

getaway that means any requests from

your devices that fall outside of your

local network must go through that

default gateway also your router gets a

public IP address provided by the

internet provider that IP can be

statically allocated to your router if

you pay extra but typically it's Dynamic

and can change at any time now let's say

you want to go to the Internet when you

open your browser and type google.com

your request goes from your device to

the router then to reach the internet

you need to get a public IP address your

router acts as a nut and translates your

private IP to the public one and then

using that IP address you can reach the

internet if you type in Google what is

my IP address you get the router's

public IP address the same thing with

other devices they all share the same

public IP address when they need to

reach the internet now let's see how

that process would work if you connected

to the VPN each VPN server would also

have a public IP address that you use to

connect to the VPN in that case it's

shared between all other people who use

that VPN provider not only your devices

in the case of openvpn when you initiate

a connection to the server it will

create a virtual network card on your

device and ask VPN server to get a

virtual private IP address to establish

a tunnel that virtual network will be

established only between your device and

the VPN server then instead of your

router's default gateway it will use VPN

as a default gateway it's up to the

client to decide if you want to Route

all the traffic via VPN or simply a

subset of requests based on the target

IP addresses let's imagine that we want

to Route all the internet traffic via

VPN to hide our real IP address now if

you want to go to Google again you will

be routed through the VPN server instead

if you ask Google for your IP it will

give you vpn's server public IP address

also most VPN providers will encrypt all

the network traffic between EU and the

resource that you're trying to access

it's optional but a common practice for

security reasons to use VPN you can

install the VPN client directly on your

device or you can install the VPN client

directly on the router then all the

devices connected to that home router

will automatically use the piano also

keep in mind that it's impossible to

stay fully Anonymous using a VPN all VPN

servers must know and keep track of your

public IP address that can be routed to

your home to Route traffic back to you

it works like an ad on your home router

but translates your public IP into the

vpn's public IP another option that you

may consider to stay Anonymous on the

Internet is to use a Tor Browser which

is free thank you for watching and I'll

see you in the next video