This Forum Beta is ONLY for registered owners of D-Link products in the USA for which we have created boards at this time.
Not with an unmodified unit, but you can if you enable telnet.
You might try to resolve why the web page goes down as well. I've never seen this on a DNS-323 or a DNS-321. The only issue I'm aware of is things get flaky when you run their BT client.
I'd be interested to know what can be "bad" at the hardware level to stop a web server from functioning, but nothing else.