The basic DLink router, and possibly all the models, have secret pages which provide many desired features. DLink, for some reason, doesn't give these out easily.

Syslog: http://192.168.1.1/Tools_SysLog.html
EMail Settings: http://192.168.1.1/Tools_EMail.html
QoS Engine: http://192.168.1.1/Advanced_Traffic_Shaping.html
Inbound Filter: http://192.168.1.1/Advanced_Inbound_Filter.html

There may be more...