WAN Setup Help

Using this page, you can set up a Default DMZ Server and allow the router to respond to a 'ping' from the internet. Both of these options have security issues, so use them carefully.

Disable Port Scan and DoS Protection - The DoS Protection protects your LAN against Denial of Service attacks. This should only be disabled in special circumstances.

Default DMZ Server

Specifying a Default DMZ Server allows you to set up a computer or server that is available to anyone on the Internet for services that you haven't defined. There are security issues with doing this, so only do this if you're willing to risk open access. If you do not assign a Default DMZ Server, the router discards any incoming service requests which are undefined.

To assign a computer or server to be a DMZ server:

  1. Click the Default DMZ Server check box
    2. .
  2. Type the IP address for that server.
  3. Click Apply.

Respond To Ping On Internet Port

If you want the Router to respond to a 'Ping' from the Internet, click this check box. This can be used as a diagnostic tool. Again, like the DMZ server, this can be a security problem. You shouldn't check this box unless you have a specific reason to do so.

Disable IGMP Proxying

The IGMP Proxying function lets a LAN PC to receive the multicast traffic it is interested in from the Internet. You can click this check box to disable the function if you do not need it.

MTU Size

The normal MTU (Maximum Transmit Unit) value for most Ethernet networks is 1500 Bytes, 1492 Bytes for PPPoE connections, 1436 for PPTP, or 1428 for L2TP connections. For some ISPs you may need to reduce the MTU. But this is rarely required, and should not be done unless you are sure it is necessary for your ISP connection.

NAT Filtering

This option determines how the router deals with inbound traffic. The Secured option provides a secured firewall to protect the PCs on LAN from attacks from the Internet, but it may cause some Internet games, point-to-point applications, or multimedia applications not to work. The Open option, on the other hand, provides a much less secured firewall, while it allows almost all Internet applications to work.

Disable SIP ALG

Some VoIP applications do not work well with the SIP ALG. Enabling this option to turn off the SIP ALG may help your VoIP devices to create/accept a call through the router.