User`s manual

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external broadband device. The LAN IP address/netmask is for private users or NAT users, and the
WAN IP address/netmask is for public users.
LAN IP Network Configuration
IP Address: Private IP address for connecting to a local private network (Default: 10.10.10.1).
Subnet Mask: Netmask for the local private network (Default: 255.255.255.0/24).
DHCP Server Configuration
DHCP stands for Dynamic Host Configuration Protocol. It can automatically dispatch related IP
settings to any local user configured as a DHCP client. The DHCP server supports up to 253 users
(PCs) on Yes: Enables the DHCP server. No: Disables the DHCP server.
Start IP Address: Sets the start IP address of the IP address pool.
End IP Address: Sets the end of IP address in the IP address pool.
DNS Server IP Address: (Default: None).
DNS stands for Domain Name System. Every Internet host must have a unique IP address, also
they may have a human friendly, easy to remember name such as www.Ebrax.com. The DNS
server converts the human friendly name into the equivalent IP address.
Primary IP Address: Sets the IP address of the primary DNS server.
Secondary IP Address: Sets the IP address of the secondary DNS server.
4.1.3 Virtual Server Setup
“Natural firewall” allows requests for Internet access from the local network. However, any request
from the Internet to the local network is blocked. By setting the Virtual Server function, computers
outside the Intranet are allowed to access specific ports of local client. The Virtual Server Port
Table may be used to expose internal servers to the public domain or open a specific port number
to internal hosts. Internet hosts can use the WAN IP address to access internal network services,
such as FTP, WWW, Telnet etc.
How to set a Virtual Server
The following example shows how an internal FTP server is exposed to the public domain. The
internal FTP server is running on the local host addressed as 192.168.0.100.
Public Port: Specifies which port should be redirected to the internal host.