Virtual Private Network
(VPN)
VPNs are private data networks over public
network
– usually the Internet.
VPNs extend corporate networks to remote
offices, mobile users, telecommuters and
other extranet partners.
VPNs use advanced encryption and
‘tunneling’ technology to establish secure,
end-to-end private network
connections over
Internet.
VPN Solutions
Remote access VPNs
establish secure,
encrypted connections between mobile or
remote users and their corporate networks
via a third-party network, such as a Internet
Service Provider(ISP)
- VPN client
– software, hardware as well as
router, or firewall based solutions available.
- Reduced cost of long
distance access calls
and internal equipment inventory
VPN Technology
Trusted VPNs
– companies lease
circuits from
communication providers
and use them in the same manner they
use physical cables in a
private LAN
-
Communication provider is ‘t
rusted’ for
data integrity and security.
- Used before Internet became universal
VPN Technology
Secure VPNs use
Internet as a
corporate communication medium. Data
is encrypted before sending, moved
over to Internet, and then decrypted at
the receiving end.
-
Encryption creates a security ‘tunnel’
that can’t be
attacked
- More desirable than Trusted VPNs
VPN Technology
Hybrid VPNs
– A secure VPN is created
as part of the
trusted VPN thus creating
a
‘hybrid’ VPN. Secure part of the VPN
is usually administered by customer
(using VPN equipments).
Secure VPNs that are administered by
ISPs are called
provider-provisioned
VPNs.