About a month ago I replaced my old WRT-54g with the Asus router. Ever since then I can't get to tcfbank.com or their ip address 188.8.131.52 . I am pretty sure there is some setting I am missing in the router, as it works if I by-pass the router. I also have the problem on multiple machines on the same network.
I have had this problem with both DD-WRT and Tomato installed - I currently have Tomato on it.