Routing Features - more
Figure 8 shows that both User and Group level permissions are supported (the Admin and Guest accounts come pre-set).
Figure 8: Disk Admin (Users and Groups)
Since I neglected to test the Airport Extreme's NAS feature performance, I made sure that I put NAS testing on my to-do list for this review. Figure 8a shows read and write results for large file sizes with a gigabit LAN connection. The large filesize write and read average throughputs of 3.8 and 4.4 MBytes/sec, respectively, place the 600N dead last in our 1000 Mbps NAS chart rankings.
The 1000 Mbps ranking with small filesizes places the 600N about mid-chart with 76.8 MB/s, but next to last for read with 7.8 MB/s.
Figure 8a: NAS Performance - 1000 Mbps LAN connection
A UPnP AV media server can be enabled (disabled by default), with the only other control being a directory scan interval. I didn't test this server.
Figure 9: Media Server
The last server included is an FTP (the ProFTPD 1.3.0 Server, actually), which is disabled by default. Figure 10 shows that you can set the server port and enable Internet access, as well as set up special FTP folders to access.
Figure 10: FTP Server
I confirmed that the Internet Access feature works by setting the FTP port to 210, then successfully connecting to an FTP session on the WAN side of the router. But the opened port doesn't appear anywhere in the Status or Applications & Gaming pages, an omission that should be fixed.
The FTP folders appear to be separate from the network shares, with their own "partitions". I had similar problems setting up FTP folders as I did in setting up shares, but this time wasn't able to successfully set up an FTP folder. In all, both the file and FTP folder setup and editing could use some work to make them more reliable and easier to use. You should also be able to use the web interface to browse and access all FTP and share folders.
Note that the 600N does not include a USB print server.