Well, Junior Member (whatever that has to do with it), you will see that I said "repeat it again", not "repeat myself again"! (Feel free to review gurb's second post).
Apparently if you banned their IP and they still connect to the page then the ban IP only takes effect to the actual stream. As for why they are connecting to that page, maybe they are trying to figure out why you banned them. Or perhaps it is automated, and they are adding you to some other yp. Either way I see no harm in viewing that page, unless you are concerned with someone seeing your:
Server Status, Stream Status, # of listeners, Listener Peak, Average Listen Time, Stream Title, Stream Genre, Stream URL, Stream ICQ, Stream AIM, Stream IRC, Current Song, OS and version of the DNAS.
However if you start getting hammered on http://IP:PORT/admin.cgi?pass=
then there would be reason for concern. I don't know what there is left to tell you regarding this issue.
You're welcome and best of luck on future problems you encounter.