Netgear 13200235 用户手册
Gateway Settings
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4. Click Settings > General > WAN Setup.
5. 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
feature should be disabled only in special circumstances.
Attack, UDP Flood, ARP Attack, Spoofing ICMP, Null Scan, and many others. This
feature should be disabled only in special circumstances.
●
Respond to Ping on Internet Port
. If you want the gateway to respond to a ping from
the Internet, select this check box. Use this feature only as a diagnostic tool because it
allows your gateway to be discovered. Do not select this check box unless you have a
specific reason.
allows your gateway to be discovered. Do not select this check box unless you have a
specific reason.
●
Disable IGMP Proxy
. 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.
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. Reduce the MTU only if you are sure that it is necessary
for your ISP connection.
might need to reduce the MTU. Reduce the MTU only if you are sure that it is necessary
for your ISP connection.
6. Click Submit.
MTU Size
Learn about maximum transmission unit (MTU) size and how to change this setting.
The maximum transmission unit (MTU) is the largest data packet a network device transmits.
When one network device communicates across the Internet with another, the data packets
travel through many devices along the way. If a device in the data path has a lower MTU setting
than the other devices, the data packets must be split or “fragmented” to accommodate the
device with the smallest MTU.
When one network device communicates across the Internet with another, the data packets
travel through many devices along the way. If a device in the data path has a lower MTU setting
than the other devices, the data packets must be split or “fragmented” to accommodate the
device with the smallest MTU.