Virtual Server Setup; Dynamic Dns; How To Set A Virtual Server - Soundwin VoIP Voice Gateway User Manual

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: 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.yahoo.com. The DNS server converts the human friendly name into it's
equivalent IP address. (Default: None)
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 222.222.222.100.
Private IP: Specifies the private IP address of the internal host offering the service
Public Port: Specifies which port should be redirected to the internal host..
Private Port: Specifies the private port number of the service offered by the internal host.
Apply: Click here to add the port-mapping entry and enable the service.

4.1.4 Dynamic DNS

DDNS is a service that maps Internet domain names to IP addresses. DDNS serves a similar
purpose to DNS: DDNS allows anyone hosting a Web or FTP server to advertise a public name
to prospective users. Unlike DNS that only works with static IP addresses, DDNS works with
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