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D6200 WiFi DSL Modem Router
WAN Setup
The WAN Setup screen lets you configure the WAN (Internet) port.
To configure the WAN:
1. Select ADV
ANCED > Setup > WAN Setup.
2. Configure the following settings:
• W
AN Preference. Select your WAN preference: Auto Detect, Must use DSL WAN, or
Must use Ethernet WAN.
• 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.
• 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. For more information, see Default DMZ Server on
page 49.
• Respond to Ping on Internet Port. If you want the WiFi DSL modem router to
respond to a ping from the Internet, select this check box. Use this feature only as a
diagnostic tool because it allows your WiFi DSL modem router to be discovered. Do
not select this check box unless you have a specific reason.
• 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 change 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 49.