In our last two threads I mentioned
how data are secured in Production Environment and in data stored state.
What about the data’s while in
transaction state, like office in one country and regional office in another
country and how the data’s are transferred securely?
Think about voice/video communication all communication is
made through IP packets only. Do you think its secured and it cannot have
hacked by others?
We need all the data should be secured in either form of
communication through data, voice or video mode.
Even accessing remote devices through command prompt or
remote desktop are replaced by SSH access.
In corporate network, most secured form of transaction is
done through Encrypted VPN connection either client access the network i.e.
users is accessing from his own laptop. Or for site to site access.
Organizations often
enable remote access solutions such as virtual private networks(VPNs). VPNs
allow employees to access the organization’s internal network from them home or
while traveling. VPN traffic goes over a public network, such as the Internet,
so encryption is important. VPNs use encryption protocols such as TLS and
Internet Protocol security (IPsec).
What is VPN? VPN stands for Virtual private network,
connecting to private through a secured tunnel in public Environment (through worldwide
internet), which is an unsecured. we need to understand what is tunnel for
complete understanding of VPN connectivity.
What is tunneling? it’s
a network communication process, it protects the content of the packet by encapsulating
with another protocol. Encapsulation and decapsulation will be done by both the
end, by using a VPN device. Normally this services will come along with all the
firewall devices.
Common VPN protocols are
PPTP, L2F, IPSEC VPN technology.
In SSH mode of
communication all the data will be encapsulated, old form of remote accessing like
telnet has a serious of security issue, which result in accessing Encrypted session
like SSH. Putty is the software commonly used for accessing remotely.