I've got a D-Link wireless router (DI-624+). Different router but the setup seems to be the same.
On the left hand menu, click on the WAN button and the entries should look something like this.
<TABLE width="100%" border=0><TBODY><TR><TD colSpan=2>WAN Settings</TD></TR><TR vAlign=top><TD colSpan=2 height=30>Please select the appropriate option to connect to your ISP.</TD></TR><TR><TD vAlign=top width="34%" height=35><INPUT onclick=ChgPage(0) type=radio value=0 name=connType> Dynamic IP Address</TD><TD vAlign=top width="66%" height=35>Choose this option to obtain an IP address automatically from your ISP. (For most Cable modem users)</TD></TR><TR><TD vAlign=top width="34%"><INPUT onclick=ChgPage(1) type=radio value=1 name=connType> Static IP Address</TD><TD vAlign=top width="66%">Choose this option to set static IP information provided to you by your ISP.</TD></TR><TR><TD vAlign=top width="34%"><INPUT onclick=ChgPage(2) type=radio CHECKED value=2 name=connType> PPPoE</TD><TD vAlign=top width="66%">Choose this option if your ISP uses PPPoE. (For most DSL users)</TD></TR><TR><TD vAlign=top width="34%"><INPUT onclick=ChgPage(3) type=radio value=3 name=connType> Others </TD><TD vAlign=top width="66%">PPTP and BigPond Cable</TD></TR><TR><TD width="24%"><TABLE width="100%"><TBODY><TR><TD width="20%"></TD><TD width="80%"><INPUT onclick=ChgPage(3) type=radio value=3 name=other_conn> PPTP</TD></TR></TBODY></TABLE></TD><TD vAlign=top width="66%">(for Europe use only)</TD></TR><TR><TD width="24%"><TABLE width="100%"><TBODY><TR><TD width="20%"></TD><TD width="80%"><INPUT onclick=ChgPage(4) type=radio value=4 name=other_conn> BigPond Cable</TD></TR></TBODY></TABLE></TD><TD vAlign=top width="66%">(for Australia use only)</TD></TR><!--<tr> <td width=24% valign=top> <table width=100%><tr> <td width=30%></td> <td width=70%> <input type=radio name=connType value=3 onClick=ChgPage(3)> PPTP</td></tr></table></td> <td width=66% valign=top>PPTP Client</td></tr>--><TR><TD colSpan=2 height=30>PPPoE</TD></TR><TR><TD width="34%"> </TD><TD width="66%"><INPUT onclick=clickPOE() type=radio CHECKED value=0 name=fixIP> Dynamic PPPoE <INPUT onclick=clickPOE() type=radio value=1 name=fixIP> Static PPPoE</TD></TR><TR><TD vAlign=top width="34%">User Name</TD><TD vAlign=top width="66%"><INPUT style="BACKGROUND-COLOR: #ffffa0" maxLength=63 size=30
[email protected] name=name> </TD></TR><TR><TD width="34%">Password</TD><TD width="66%"><INPUT type=password maxLength=63 size=30 name=pass> </TD></TR><TR><TD width="34%">Retype Password </TD><TD width="66%"><INPUT type=password maxLength=63 size=30 name=pass_v> </TD></TR><TR><TD width="34%">Service Name</TD><TD width="66%"><INPUT maxLength=63 size=30 value=Internode name=srv_name> (optional) </TD></TR><TR><TD width="34%">IP Address</TD><TD width="66%"><INPUT disabled maxLength=15 size=16 value=0.0.0.0 name=ip> </TD></TR><TR><TD width="34%">Primary DNS Address</TD><TD width="66%"><INPUT maxLength=15 size=16 value=0.0.0.0 name=dns1> </TD></TR><TR><TD width="34%">Secondary DNS Address</TD><TD width="66%"><INPUT maxLength=15 size=16 value=0.0.0.0 name=dns2> (optional)</TD></TR><TR><TD width="34%">Maximum Idle Time</TD><TD width="66%"><INPUT size=4 value=0 name=idle> Minutes</TD></TR><TR><TD width="34%">MTU</TD><TD width="66%"><INPUT maxLength=4 size=5 value=1492 name=mtu> </TD></TR><TR><TD width="34%">Connect mode select</TD><TD width="66%"><INPUT type=radio CHECKED value=1 name=auto_recon> Always-on <INPUT type=radio value=0 name=auto_recon> Manual <INPUT type=radio value=2 name=auto_recon> Connect-on demand </TD></TR></TBODY></TABLE>
Once you have saved this, go to the STATUS tab across the top and then onto the device info. It should look something like this:-
<TABLE cellSpacing=2 cellPadding=0 width="100%" border=0><TBODY><TR><TD colSpan=2 height=15>Device Information</TD></TR><TR><TD colSpan=2 height=20>
Firmware Version: 2.05 , 21 Sep 2004
</TD></TR><TR bgColor=#cccccc><TD colSpan=2>
LAN
</TD></TR><TR><TD width="22%" height=25>
MAC Address
</TD><TD width="78%" height=25>00-11-95-56-21-69 </TD></TR><TR><TD width="22%" height=25>
IP Address
</TD><TD width="78%" height=25>192.168.1.1 </TD></TR><TR><TD width="22%" height=25>
Subnet Mask
</TD><TD width="78%" height=25>255.255.255.0 </TD></TR><TR><TD width="22%" height=25>
DHCP Server
</TD><TD width="78%" height=25>Enabled </TD></TR><TR><TD width="22%" height=25> </TD><TD width="78%" height=25> </TD></TR><TR><TD bgColor=#cccccc colSpan=2>WAN</TD></TR><TR><TD width="22%" height=25>
MAC Address
</TD><TD width="78%" height=25>00-11-95-56-21-6a </TD></TR><TR><TD width="22%" height=25>
Connection
</TD><TD width="78%" height=25>PPPoE Connected <INPUT type=submit value=Connect name=connect> <INPUT type=submit value=Disconnect name=disconnect> </TD></TR><TR><TD width="22%" height=25>
IP Address
</TD><TD width="78%" height=25>59.167.64.194 </TD></TR><TR><TD width="22%" height=25>
Subnet Mask
</TD><TD width="78%" height=25>255.255.255.255 </TD></TR><TR><TD width="22%" height=25>
Default Gateway
</TD><TD width="78%" height=25>59.167.64.194 </TD></TR><TR><TD width="22%" height=25>
DNS
</TD><TD width="78%" height=25>192.231.203.132 192.231.203.3 </TD></TR><TR><TD width="22%" height=25> </TD><TD width="78%" height=25>
</TD></TR><TR><TD bgColor=#cccccc colSpan=2>Wireless</TD></TR><TR><TD width="22%" height=25>
MAC Address
</TD><TD width="78%" height=25>00-11-95-50-ad-f9 </TD></TR><TR><TD width="22%" height=25>
SSID
</TD><TD width="78%" height=25>Boxers </TD></TR><TR><TD width="22%" height=25>
Channel
</TD><TD width="78%" height=25>6 </TD></TR><TR><TD width="22%" height=25>
WEP
</TD><TD width="78%" height=25>Disabled
</TD></TR><TR><TD colSpan=2 height=25>
Being a typical computer thing, it took a while to work. Try turning it off for 30 seconds and turn it back on and have another look.
</TD></TR></TBODY></TABLE>