I just got my NAS, first one, and this is my first time for me setting up my own FTP. I followed all the instructions for setting up my NAS, and I still couldn't get it to work.
I created my own DDNS using D-Link's free service, and I forwarded port 21 on my router and still no dice. I did a little searching and I found that my ISP, Charter Communications, blocks port 21 in order to prevent customers from setting up their own servers.
My setup right now is: Ubee cable modem -> Linksys WRT45G -> Netgear gigabit switch -> NAS
WRT45G ConfigurationLogin Type: Automatic Configuration - DHCP
IP Address: 71.81.77.7
Subnet Mask: 255.255.240.0
Default Gateway: 71.81.64.1
DNS 1: 24.217.0.5
DNS 2: 24.217.201.67
DNS 3: 68.113.206.10
MTU: 1492
DNS-321 ConfigurationIP Address: 192.168.1.107
Subnet Mask: 255.255.255.0
Gateway IP Address: 192.168.1.1
Mac Address: F0:7D:68:69:22:F7
DNS1: 24.217.0.5
DNS2: 24.217.201.67
<a href="http://s1106.photobucket.com/albums/h362/davwils/?action=view&current=stuff.png" target="_blank"><img src="http://i1106.photobucket.com/albums/h362/davwils/stuff.png" border="0" alt="WRT45G Port Forwarding"></a>This is what the port forwarding page looks like on my router.
From what I looked at on other threads people discussed opening some public port > 1023 and have it forward to the private port 21, or using PASV vs Active. I didn't know what this meant, or if I could even accomplish this with my current hardware. The D-Link FAQ page was pretty vague about any of this, and all it said was I could use nonstandard ports and that I would access my NAS externally by typing my DDNS page into the URL.
From what I understood mine would be: spacecommand.dlinkddns.com:XXXX with XXXX being the new port that my router is listening to for the FTP server.
And yes I have my router configured for DDNS with my webpage.
Any help on this would be greatly appreciated as I am tired of reading mass quantities of forum posts looking for an answer.