Kerio Tech Firewall6, Administrator'S Manual

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Chapter 23
Kerio VPN
WinRoute enables secure interconnection of remote private networks using an encrypted tun-
nel and it provides clients secure access to their local networks via the Internet. This method
of interconnection of networks (and of access of remote clients to local networks) is called
virtual private network ( VPN ). WinRoute includes a proprietary implementation of VPN, called
“ Kerio VPN ”.
Kerio VPN is designed so that it can be used simultaneously with the firewall and with NAT
(even along with multiple translations). Creation of an encrypted tunnel between networks
and setting remote access of clients at the server is very easy.
Kerio VPN enables creation of any number of encrypted server-to-server connections (i.e. tun-
nels to remote private networks). Tunnels are created between two WinRoutes (typically at
Internet gateways of corresponding networks). Individual servers (endpoints of the tunnels)
verify each other using SSL certificates — this ensures that tunnels will be created between
trustworthy servers only.
Individual hosts can also connect to the VPN server in WinRoute (secured client-to-server con-
nections). Identities of individual clients are authenticated against a username and password
(transmitted also by secured connection), so that unauthorized clients cannot connect to local
networks.
Remote connections of clients are performed through Kerio VPN Client , included in WinRoute
(for a detailed description, view the stand-alone Kerio VPN Client — User Guide document).
Note: For deployment of the Kerio VPN , it is supposed that WinRoute is installed at a host
which is used as an Internet gateway. If this condition is not met, Kerio VPN can also be used,
but the configuration can be quite complicated.
Benefits of Kerio VPN
In comparison with other products providing secure interconnection of networks via the In-
ternet, the Kerio VPN solution provides several benefits and additional features.
• Easy configuration (only a few basic parameters are required for creation of tunnels
and for configuration of servers which clients will connect to).
• No additional software is required for creation of new tunnels ( Kerio VPN Client must
be installed at remote clients — installation file of the application is 8 MB).
•
No collisions arise while encrypted channels through the firewall are being created.
It is supposed that one or multiple firewalls (with or without NAT) are used between
connected networks (or between remote clients and local networks).