A good intro for VPN's

1. VPN
(VIRTUAL PRIVATE NETWORK)
- Kunal Das

2. Why we need a VPN ???
• Security on Public Wi-Fi
• Data Privacy From Your Internet Service Provider
• Data Privacy From the Apps and Services You Use
• Data Privacy From Your Government
• Employees who are away on business travel and can't use telephone dialup
lines.
• PUBLIC WIFI EXAMPLE …..
• Question !  But HTTPS ( where “s” stands for secure) why we are not safe in public networks?

3. Why HTTPS alone won’t keep you
safe on public WiFi
• Most websites now use HTTPS to encrypt your connection and add
an additional layer of protection to your data
• HTTPS does not encrypt all your data, like DNS queries.
• Also, the full domain or subdomain and the originating IP address.
ATTACKS …
DNS leak
DNS spoofing / DNS poisoning.
Punycode attacks.

4. So what is A
VPN ?
• A VPN is a virtual network, built on top of
existing physical networks, that can
provide a secure communications
mechanism for data and IP information
transmitted between network
• It creates an encrypted tunnel for your
data, protects your online identity by
hiding your IP address
Well known VPN’s :- NordVPN ,
ExpressVPN , PureVPN , ExpressVPN
…..

5. Types of Virtual Private Network
(VPN)
• Remote Access VPN:
Remote Access VPN permits a user to connect to a private
network and access all its services and resources remotely.
Remote Access VPN is useful for home users and business
users both.
• Site to Site VPN:
A Site-to-Site VPN is also called as Router-to-Router VPN
and is commonly used in the large companies.
Intranet based VPN and Extranet based VPN

6. Protocols
used in
VPN
Internet Protocol
Security (IPSec)
(i) Transport mode
(ii) Tunneling mode
Layer 2 Tunneling Protocol (L2TP)
Point–to–Point Tunneling Protocol
(PPTP)
SSL and TLS
Secure Shell (SSH)

7. Can you
be tracked
with a
VPN?
Free VPNs need to make
their money somehow, and
that's often done by selling
your data to third-parties
A zero-logs VPN - is a VPN
service that doesn't store
data about users' online
activities or connections.
~ Use Premium VPN’s

8. Thank You