ZyWALL Series CLI Reference Guide
192
CHAPTER 22
Virtual Servers
This chapter describes how to set up, manage, and remove virtual servers. Virtual server commands
configure NAT.
22.1 Virtual Server Overview
Virtual servers are computers on a private network behind the Zyxel Device that you want to make
available outside the private network. If the Zyxel Device has only one public IP address, you can make
the computers in the private network available by using ports to forward packets to the appropriate
private IP address.
Note: Virtual server is also known as port forwarding or port translation.
22.1.1 1:1 NAT and Many 1:1 NAT
1:1 NAT - If the private network server will initiate sessions to the outside clients, use 1:1 NAT to have the
Zyxel Device translate the source IP address of the server’s outgoing traffic to the same public IP address
that the outside clients use to access the server.
Many 1:1 NAT - If you have a range of private network servers that will initiate sessions to the outside
clients and a range of public IP addresses, use many 1:1 NAT to have the Zyxel Device translate the
source IP address of each server’s outgoing traffic to the same one of the public IP addresses that the
outside clients use to access the server. The private and public ranges must have the same number of IP
addresses.
One many 1:1 NAT rule works like multiple 1:1 NAT rules, but it eases the configuration effort since you
only create one rule.
22.2 Virtual Server Commands Summary
The following table describes the values required for many virtual server commands. Other values are
discussed with the corresponding commands .
The following table lists the virtual server commands
Table 98 Input Values for Virtual Server Commands
LABEL DESCRIPTION
service_object
The name of a service. You may use 1-31 alphanumeric characters, underscores(_), or
dashes (-), but the first character cannot be a number. This value is case-sensitive.
profile_name
The name of the virtual server. You may use 1-31 alphanumeric characters, underscores(_),
or dashes (-), but the first character cannot be a number. This value is case-sensitive.
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