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45
N600 Wireless Dual Band Router JNDR3000
To view or change the WAN settings:
1.
Select
ADVNCED > Setup > WAN Setup
to view the following screen.
2.
Specify the following settings:
•
Disable Port Scan and DoS Protection
. DoS protection protects your LAN against
denial of service attacks such as Syn flood, Smurf Attack, Ping of Death, Teardrop
Attack, UDP Flood, ARP Attack, Spoofing ICMP, Null Scan, and many others. This
should be disabled only in special circumstances.
•
Default DMZ Server
. This feature is sometimes helpful when you are playing online
games or videoconferencing. Be careful when using this feature because it makes the
firewall security less effective. See the following section,
Default DMZ Server
, for
more details.
•
Respond to Ping on Internet Port
. If you want the router to respond to a ping from
the Internet, select this check box. Use this only as a diagnostic tool because it allows
your router to be discovered. Do not select this check box unless you have a specific
reason.
•
Disable IGMP Proxying
. IGMP proxying allows a computer on the local area network
(LAN) to receive the multicast traffic it is interested in from the Internet. If you do not
need this feature, you can select this check box to disable it.
•
MTU Size (in bytes)
. The normal MTU (maximum transmit unit) value for most
Ethernet networks is 1500 bytes, or 1492 bytes for PPPoE connections. For some
ISPs, you might need to reduce the MTU. This is rarely required, and should not be
done unless you are sure that it is necessary for your ISP connection. See
Change
the MTU Size
on page
46.
•
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
