Set Up A Default Dmz Server; Dynamic Dns - NETGEAR JWNR2000v2 User Manual

NETGEAR N300 Wireless Router JWNR2000v2 User Manual
NAT Filtering. Network Address Translation (NAT) determines how the router processes
inbound traffic. Secured NAT provides a secured firewall to protect the computers on the LAN
from attacks from the Internet, but might prevent some Internet games, point-to-point
applications, or multimedia applications from functioning. Open NAT provides a much less
secured firewall, but allows almost all Internet applications to function.
Disabling the SIP ALG. The Session Initiation Protocol (SIP) Application Level Gateway
•
(ALG) is enabled by default to optimize VoIP phone calls that use the SIP. The Disable
SIP ALG check box allows you to disable the SIP ALG. Disabling the SIP ALG might be
useful when running certain applications.
Enable IPv6 pass-through. Select this check box if your Internet service provider (ISP)
•
specifies that your Internet connection uses IPv6 pass-through.

Set Up a Default DMZ Server

For security reasons, you should avoid using the default DMZ server
Note:
feature. When a computer is designated as the default DMZ server,
it loses much of the protection of the firewall and is exposed to many
exploits from the Internet. If compromised, the computer can be
used to attack your network.
Incoming traffic from the Internet is usually discarded by the router unless the traffic is a
response to one of your local computers or a service that you have configured in the Ports
screen. Instead of discarding this traffic, you can have it forwarded to one computer on your
network. This computer is called the default DMZ server.
To assign a computer or server to be a default DMZ server:
In the WAN screen, select the Default DMZ Server check box
1.
In the Default DMZ Server fields, enter the IP address for that computer or server.
2.
Click Apply.
3.

Dynamic DNS

If your Internet Service Provider (ISP) gave you a permanently assigned IP address, you can
register a domain name and have that name linked with your IP address by public Domain
Name Servers (DNS). However, if your Internet account uses a dynamically assigned IP
address, you do not know in advance what your IP address will be, and the address can
change frequently. In this case, you can use a commercial Dynamic DNS service, which
allows you to register your domain to their IP address, and forwards traffic directed at your
domain to your frequently changing IP address.
Chapter 6. Advanced Settings | 67