Extended Intranets; Site To Site Vpn Solutions - ZyXEL Communications ZYWALL 1050 Support Notes

1.1 Extended Intranets

The ZyXEL VPN solutions primarily can be used to extend the intranet and deliver
increased connectivity between operation sites. The branch office subnet will be considered a
part of main office internet. Therefore, user behind branch office also can use the internal
network resources as if he was in the main office. Because of the VPN connection, user will
feel like he is using a local LAN even though he is accessing the network resources via
Internet. Use of a VPN for smaller branch offices, franchise sites and remote workers provides
nearly the same level of connectivity and reliability as a private network. The remote
connection cost also can decrease by leveraging the Internet connections to replace expensive
leased lines.

1.1.1 Site to Site VPN solutions

Site to Site VPN is the basic VPN solution between local and remote gateway. This type of
VPN connection is used to extend and join local networks of both sites into a single intranet.
There are two kinds of connection interface, static IP and dynamic DNS.
Configure ZyWALL 1050 with Static IP address:
ZyWALL 1050 uses the static IP address for VPN connection. The topology is shown at the
following figure.
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ZyWALL 1050 Support Notes
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