OK this is a different brand of modem but I wonder if the same applies: http://www.usr.com/support/doc-popup...es/rtr-faq.htm (half-way down page.) I don't know about DMZ other than what it means & stands for, nor do I know about mac filtering.

I found this which gives some good overall descriptons: http://www.networkeverywhere.com/sup...tersupport.asp

More results HERE!