Netgear WNR612 — настройки WAN для беспроводного маршрутизатора: руководство [34/99]

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NETGEAR genie Advanced Home

N150 2-Port Wireless Router WNR612v3

 To view or change the WAN settings:

Select Advanced > Setup > WAN Setup:

The following settings are available:

• 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 setting 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 traf

fic 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 it is necessary for your ISP connection. See Change the

MTU Size on page 35.

• NA

T 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.