ZyXEL Communications 200 Series - Manual (Page 60)

Chapter 2 Features and Applications
ZyWALL USG 100/200 Series User’s Guide
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2.2.2 Interface to Interface (To/From ZyWALL)
To: Ethernet -> VLAN -> Encap -> ALG -> DNAT -> Routing -> zFW -> ADP -> RM
From: RM -> Routing -> BWM -> Encap -> VLAN -> Ethernet
2.2.3 Interface to Interface (From VPN Tunnel)
This example shows the flow from a VPN tunnel though the ZyWALL, not to the ZyWALL or
to another VPN tunnel (VPN concentrator).
Ethernet -> VLAN -> Encap -> ALG -> DNAT-> Routing -> zFW -> IPSec D -> ALG -> AC
-> DNAT-> Routing -> FW -> IDP -> AP -> CF -> AV -> AS -> SNAT -> BWM -> Encap ->
VLAN -> Ethernet
2.2.4 Interface to Interface (To VPN Tunnel)
This example shows the flow to a VPN tunnel from a source other than the ZyWALL or
another VPN tunnel (VPN concentrator).
Ethernet -> VLAN -> Encap -> ALG -> DNAT-> Routing -> FW -> IDP -> AP -> CF -> AV
-> AS -> SNAT -> IPSec E -> Routing -> BWM -> Encap -> VLAN -> Ethernet
2.3 Applications
These are some example applications for your ZyWALL. See also Chapter 6 on page 125 for
configuration tutorial examples.
2.3.1 VPN Connectivity
Set up VPN tunnels with other companies, branch offices, telecommuters, and business
travelers to provide secure access to your network. You can also set up additional connections
to the Internet to provide better service.