Yes, if the Buffalo MTU is set at anything other than the default setting, it will not allow Web access with either HTTP or HTTPS. I have to reset my client MTU to NO Jumbo frames so I can access the Buffalo Web Interface again. This is the only way, I tried every MTU I could above the default. Weird thing is I can see the Buffalo Shares on the network when they are set at a higher MTU than the default and read and write to the share but, NO web access with HTTP or HTTPS unless the client connecting has No Jumbo Frames set at the Nic. Very weird...