I have this strange problem with my wireless setup on the DIR-655.
Bought it about six months ago, and never got wireless to work properly.
If I choose WPA2, the clients don't show up in the router website (under wireless)
All wireless clients can connect to the router and access the internet, but not the LAN.
So my laptop cant access shared files on my workstation (and cant even get a ping reply from that IP)
My android phone cant access the media center to be used as a remote control.
I also seem to experience some dropouts where the only real solution is rebooting the router.
I have been playing around with TKIP/AES, WPA/WPA2, but if I get it to work (get contact with LAN, clients showing up in the router website),
it stops working after rebooting the router (the settings are the same as before the reboot)
If I choose WEP, it displays two networks with the same SSID on my android phone and laptops, one WEP and one WPA.
I can use it fine with the win7 laptop and android phone, but on my old winxp laptop and my friends iphones, they only get one network, and are unable to connect to it (access denied, probably wpa network)
Info from the router admin website:
Product Page: DIR-655
Hardware Version: B1
Firmware Version: 2.00
I cant update firmware since it says it already is on the latest version.