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Page 136 / 296 Scroll up to view Page 131 - 135
Chapter 11 Network Address Translation (NAT)
NBG334W User’s Guide
136
Figure 77
Network > NAT > Advanced
The following table describes the labels in this screen.
Table 53
Network > NAT > Advanced
LABEL
DESCRIPTION
Max NAT/Firewall
Session Per User
Type a number ranging from 1 to 2048 to limit the number of NAT/firewall sessions
that a host can create.
When computers use peer to peer applications, such as file sharing
applications, they may use a large number of NAT sessions.
If you do not
limit the number of NAT sessions a single client can establish, this can result in all
of the available NAT sessions being used. In this case, no additional NAT sessions
can be established, and users may not be able to access the Internet.
Each NAT session establishes a corresponding firewall session. Use this field to
limit the number of NAT/firewall sessions each client computer can establish
through the NBG334W.
If your network has a small number of clients using peer to peer applications, you
can raise this number to ensure that their performance is not degraded by the
number of NAT sessions they can establish. If your network has a large number of
users using peer to peer applications, you can lower this number to ensure no
single client is using all of the available NAT sessions.
Port Triggering
Rules
#
This is the rule index number (read-only).
Name
Type a unique name (up to 15 characters) for identification purposes. All
characters are permitted - including spaces.
Page 137 / 296
Chapter 11 Network Address Translation (NAT)
NBG334W User’s Guide
137
Incoming
Incoming is a port (or a range of ports) that a server on the WAN uses when it
sends out a particular service. The NBG334W forwards the traffic with this port (or
range of ports) to the client computer on the LAN that requested the service.
Start Port
Type a port number or the starting port number in a range of port numbers.
End Port
Type a port number or the ending port number in a range of port numbers.
Trigger
The trigger port is a port (or a range of ports) that causes (or triggers) the
NBG334W to record the IP address of the LAN computer that sent the traffic to a
server on the WAN.
Start Port
Type a port number or the starting port number in a range of port numbers.
End Port
Type a port number or the ending port number in a range of port numbers.
Apply
Click
Apply
to save your changes back to the NBG334W.
Reset
Click
Reset
to begin configuring this screen afresh.
Table 53
Network > NAT > Advanced
LABEL
DESCRIPTION
Page 138 / 296
Chapter 11 Network Address Translation (NAT)
NBG334W User’s Guide
138
Page 139 / 296
NBG334W User’s Guide
139
C
HAPTER
12
Dynamic DNS
12.1
Dynamic DNS Introduction
Dynamic DNS allows you to update your current dynamic IP address with one or many
dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You
can also access your FTP server or Web site on your own computer using a domain name (for
instance myhost.dhs.org, where myhost is a name of your choice) that will never change
instead of using an IP address that changes each time you reconnect. Your friends or relatives
will always be able to call you even if they don't know your IP address.
First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is
for people with a dynamic IP from their ISP or DHCP server that would still like to have a
domain name. The Dynamic DNS service provider will give you a password or key.
12.1.1
DynDNS Wildcard
Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the
same IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use,
for example, www.yourhost.dyndns.org and still reach your hostname.
"
If you have a private WAN IP address, then you cannot use Dynamic DNS.
12.2
Dynamic DNS Screen
To change your NBG334W’s DDNS, click
Network > DDNS
. The screen appears as shown.
Page 140 / 296
Chapter 12 Dynamic DNS
NBG334W User’s Guide
140
Figure 78
Dynamic DNS
The following table describes the labels in this screen.
Table 54
Dynamic DNS
LABEL
DESCRIPTION
Enable Dynamic DNS
Select this check box to use dynamic DNS.
Service Provider
Select the name of your Dynamic DNS service provider.
Dynamic DNS Type
Select the type of service that you are registered for from your Dynamic DNS
service provider.
Host Name
Enter a host names in the field provided. You can specify up to two host
names in the field separated by a comma (",").
User Name
Enter your user name.
Password
Enter the password assigned to you.
Enable Wildcard
Option
Select the check box to enable DynDNS Wildcard.
Enable off line option
This option is available when
CustomDNS
is selected in the
DDNS Type
field. Check with your Dynamic DNS service provider to have traffic
redirected to a URL (that you can specify) while you are off line.
IP Address Update Policy:
Use WAN IP Address
Select this option to update the IP address of the host name(s) to the WAN IP
address.
Dynamic DNS server
auto detect IP Address
Select this option to update the IP address of the host name(s) automatically
by the DDNS server. It is recommended that you select this option.
Use specified IP
Address
Type the IP address of the host name(s). Use this if you have a static IP
address.
Apply
Click
Apply
to save your changes back to the NBG334W.
Reset
Click
Reset
to begin configuring this screen afresh.

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