What's DMZ used for in a home wireless router?

"The DMZ is good if you want to run a home server that can be accessed from outside of your home network (ie web server, ssh, vnc or other remote access protocol). Typically you would want to run a firewall on the server machine to make sure only the ports that are specifically wanted are allowed access from public computers.

An alternative to using the DMZ is to setup port forwarding. With port forwarding you can allow only specific ports through your router and you can also specify some ports to go to different machines if you have multiple servers running behind your router."

"A DMZ or ""de-militarized zone"" is where you can set up servers or other devices that need to be accessed from outside your network.

What belongs there? Web servers, proxy servers, mail servers etc.

In a network, the hosts most
vulnerable to attack are those that
provide services to users outside of
the LAN, such as e-mail, web and DNS
servers. Because of the increased
potential of these hosts being
compromised, they are placed into
their own subnetwork in order to
protect the rest of the network if an
intruder was to succeed. Hosts in the
DMZ have limited connectivity to
specific hosts in the internal
network, though communication with
other hosts in the DMZ and to the
external network is allowed. This
allows hosts in the DMZ to provide
services to both the internal and
external network, while an intervening
firewall controls the traffic between
the DMZ servers and the internal
network clients."