I have the revision b version of the dir-655. I'm having a couple issues which im not sure if are related to the dir-655 or something else.
First Issue:
I used to be able to do this, then all of the sudden (I may have changed something) I cannot anymore. The issue is: If I try and access my linux server using http://[My Public IP Address]/ from *inside* my LAN, It will time out and not connect. If I try and access my same public ip address from *outside* my LAN, it works fine.
Second Issue:
My router was noticeably slow to respond when navigating the menu system. Then, I changed the ip address to 192.168.0.2 (previously it was 192.168.0.1) and all of the sudden its fast again. I tried rebooting and power cycling before I changed the IP and it was always slow using 192.168.0.1.