Page 116 / 130 Scroll up to view Page 111 - 115
Billion 810VGTX Router
Page | 115
Add Virtual Server
Because NAT can act as a “natural” Internet firewall, your router protects your network from being accessed by outside
users when using NAT, as all incoming connection attempts will point to your router unless you specifically create Virtual
Server entries to forward those ports to a PC on your network.
When your router needs to allow an outside user to access the internal server, e.g. a web server, FTP server, Email
server or game server, the router can act as a virtual server. You can set up a local server with a specific port number
for this service, e.g. web/HTTP (port 80), FTP (port 21), Telnet (port 23), SMTP (port 25), or POP3 (port 110). When an
incoming access request to the router for a specified port is received, it will be forwarded to the corresponding internal
server.
Application
: User defined description to identify this entry or click the Application drop-down menu to select existing
predefined rules.
:
20
predefined rules are available.
Application, Protocol and External/Redirect Ports will be filled after the
selection.
Protocol
: It is the supported protocol for the virtual server. In addition to specifying the port number to be used, you will
also need to specify the protocol used. The protocol used is determined by a particular application. Most applications will
use TCP or UDP.
Time Schedule:
A user defined time period to enable your virtual server. You may specify a time schedule or select
“Always on” for this Virtual Server Entry. For setup and detail, refer to the
Time Schedule
section.
External Port:
The Port number on the Remote/WAN side used when accessing the virtual server.
Redirect Port:
The Port number used by the Local server in the LAN network.
Internal IP Address:
The private IP in the LAN network, which will be providing the virtual server application.
Lists all PC’s currently connected to the network. You may assign a PC with IP address and MAC from this
list.
Example:
If you would like to remotely access your Router through the Web/HTTP all the time, you will need to enable port
number 80 (Web/HTTP) and map to the Router’s IP Address. Then all incoming HTTP requests from you (Remote side)
will be forwarded to the Router with an IP address of
10.0.0.2. Since port number 80 has already been predefined, next to the Application click on the drop down box. A
window with a list of predefined rules will pop up, you can then select HTTP_Sever.
Page 117 / 130
Billion 810VGTX Router
Page | 116
°
Using port forwarding does have some implications, as outside users will
be able to connect to PC’s on your network. For this reason, you are
advised to use specific Virtual Server entries for the port your application
requires instead of using DMZ. Doing so will result in all connections from
WAN to attempt to access the public IP your DMZ specifies.
°
If you have disabled NAT in the WAN-ISP section, the Virtual Server will not
function. If the DHCP option is enabled, you must be careful while
assigning IP addresses to Virtual Servers in order to avoid IP conflicts.
The easiest way of configuring a Virtual Server is to assign static IP
addresses to each Virtual Server PC, with addresses that do not fall into
the range of IP addresses reserved for DHCP. If you configure the IP
address manually, be sure that it is in the same subnet.
Application:
HTTP_Sever
Time Schedule:
Always On
Protocol:
tcp
External Port:
80-80
Redirect Port:
80-80
IP Address:
10.0.0.2
Add:
Click it to apply your settings.
Edit/Delete:
Click it to edit or delete this virtual server application.
Attention
Page 118 / 130
Billion 810VGTX Router
Page | 117
Edit DMZ Host
A DMZ Host is a local computer that is exposed to the Internet. When setting a particular internal IP address as the DMZ
Host, all incoming packets that do not use the port number that is being used by any other Virtual Server entries will be
checked by the Firewall and NAT algorithms before being passed to the DMZ host.
Caution: The computer that is exposed to the Internet may face various security risks.
Go to Configuration > Virtual Server > Edit DMZ Host
Enabled:
It activates your DMZ function.
Disabled:
This is the default setting, it disables the DMZ function.
Internal IP Address:
Give a static IP address to the DMZ Host when
Enabled
radio button is checked. Be aware that
this IP will be exposed to the WAN/Internet.
Lists all PC’s connected to the network. You may assign a PC with an IP address from this list
Select the Apply button to apply your changes.
Edit One-to-One NAT (Network Address Translation)
One-to-One NAT maps a specific private / local IP address to a global / public IP address.
If you have multiple public / WAN IP addresses from your ISP, you are eligible to use these IP addresses in One-to-One
NAT.
Go to Configuration > Virtual Server > Edit One-to-one NAT
NAT Type:
Select the desired NAT type. One-to-One NAT function is set to ‘Disabled’ by default.
Global IP Address:
Subnet:
The subnet of the public/WAN IP address given to you by your ISP.
If your ISP has provided this
information, you may type it in here.
Otherwise, use IP Range method.
IP Range:
The IP address range of your public/WAN IP addresses. For example, IP: 192.168.1.1, end
IP:192.168.1.10
Page 119 / 130
Billion 810VGTX Router
Page | 118
Select the
Apply
button to apply your changes.
Check
to create a new One-to-One NAT rule:
Application
: User defined description to identify this entry, or click the
drop-down menu to select a
predefined rule.
:
20
predefined rules are available.
Application, Protocol and External/Redirect Ports will be filled after the
selection.
Protocol
: It is the supported protocol for the virtual server. In addition to specifying the port number to be used, you will
also need to specify the protocol used. The protocol used is determined by the particular application. Most applications
will use TCP or UDP.
Time Schedule:
User defined time period to enable your virtual server. You may specify a time schedule or select
“Always on” for this Virtual Server Entry. For setup and detail, refer to the
Time Schedule
section.
Global IP:
Define a public/WAN IP address for this Application. This Global IP address must be defined in the Global IP
Address blank.
External Port:
The Port number on the Remote/WAN side used when accessing the virtual server.
Redirect Port:
The Port number used by the Local server in the LAN network.
Internal IP Address:
The private IP in the LAN network which provides the virtual server application.
Lists all
the PC’s currently connected to the network. You may assign a PC with an IP address from this list.
Select the
Add
button to apply your changes.
Example: List of some well-known and registered port numbers.
The Internet Assigned Numbers Authority (IANA) is the central coordinator for the assignment of unique parameter
values for Internet protocols. Port numbers range from 0 to 65535, but only ports numbers 0 to 1023 are reserved for
privileged services and are designated as “well-known ports” (Please refer to Table 5). The registered ports are
numbered from 1024 through 49151. The remaining ports, referred to as dynamic or private ports, are numbered from
49152 through 65535.
For further information, please see IANA’s website at
For help on determining which private port numbers are used by common applications on this list, please see the FAQs
(Frequently Asked Questions) at
Page 120 / 130
Billion 810VGTX Router
Page | 119
Table 5: Well-known and registered Ports
Port Number
Protocol
Description
20
TCP
FTP Data
21
TCP
FTP Control
22
TCP & UDP
SSH Remote Login Protocol
23
TCP
Telnet
25
TCP
SMTP (Simple Mail Transfer Protocol)
53
TCP & UDP
DNS (Domain Name Server)
69
UDP
TFTP (Trivial File Transfer Protocol)
80
TCP
World Wide Web HTTP
110
TCP
POP3 (Post Office Protocol Version 3)
119
TCP
NEWS (Network News Transfer Protocol)
123
UDP
NTP (Network Time Protocol) / SNTP (Simple Network Time
Protocol
161
TCP
SNMP
443
TCP & UDP
HTTPS
1503
TCP
T.120
1720
TCP
H.323
4000
TCP
ICQ
7070
UDP
RealAudio

Rate

3.5 / 5 based on 2 votes.

Bookmark Our Site

Press Ctrl + D to add this site to your favorites!

Share
Top