next time you do a firmware update, sniff it.
see if it really is updating via http or if it is using ftp instead...
I take it you've tried other ftp commands on it and they just aren't working?
Other than that... I'm not sure there is much more that you'd want to do with it? I'd say store files.. .but the memory in those things are big enough for firmware, your settings and some logs. Heck, most of the time, the logs are only in the memory, so once you powercycle it, the entries in the log buffer are lost. Most cheap routers I've seen have between a 2 and 8mb flash memory chip in there.
Maybe try to find a DoS in the ftp software? Buffer overflow or fuzzer?
But then again... the firewalls on those NAT routers generally block ftp by default.
If it were affected by a DoS, it'd have to be launched from your LAN with the default firewall/port forwarding rules...
Heck, those things are easy enough to DoS without trying to attack it... just get a couple of decent torrents going and you'll see the things almost smoke!
I beleive that dlink may reuse open source code in their firmware?
Maybe look for the code they're using for ftp and see what commands it will accept?
I know that linksys was using open source firmware for quite a while. Not sure if they still are...
Even in my ciscos, there isn't much space for other things. I've got about 8mb of free space (maxed out on the flash) after the IOS, several config backups, the SDM and whatnot.
Maybe a good place to stash some small files for safe keeping? It'd be one of the last places I looked...
Just curious... how is that dlink holding up for you? Every single one I've used or had to support was horrible... but that was just my experience...
Just some rambling thoughts from someone who had a hell of s stressful day....
