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N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700v2
- Disable SIP ALG. Some VoIP applications do not work well with the SIP ALG.
Enabling this option to turn off the SIP ALG might help your VoIP devices to
create/accept a call through the router.
- Dis
able IGMP Proxying. The Internet Group Management Protocol (IGMP) is an
Internet protocol that provides a way for an Internet computer to report its multicast
group membership to adjacent routers. The hosts interact with the system through the
exchange of IGMP messages. When you configure IGMP proxy, the router interacts
with other routers through the exchange of IGMP messages. However, when acting
as the proxy, the router performs the host portion of the IGMP task as follows:
• When
queried, the router sends membership reports to the group.
• When
one of the hosts joins a multicast address group that none of other hosts
belongs to, the router sends unsolicited membership reports to that group.
• When
the last host in a particular multicast group leaves the group, the router
sends a leave group membership report to that router's group.
Default DMZ Server
The default DMZ server feature is helpful when you are using some online games and
videoconferencing applications that are incompatible with Network Address Translation
(NAT). The wireless modem router is programmed to recognize some of these applications
and to work correctly with them, but there are other applications that might not function well.
In some cases, one local computer can run the application correctly if that computer’s IP
address is entered as the default DMZ server.
DMZ servers pose a security risk. A computer designated as the
default DMZ server loses much of the protection of the firewall
and is exposed to exploits from the Internet. If compromised, the
DMZ server computer can be used to attack other computers on
your network.
Incoming traffic from the Internet is usually discarded by the wireless modem router unless
the traffic is a response to one of your local computers or a service that you have configured
in the Port Forwarding/Port Triggering 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 set up a default DMZ server:
1. On the
WAN Setup screen, select the Default DMZ Server check box.
2. T
ype the IP address.
3. Click App
ly.
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