I am facing a strange issue. I use tomato on Buffallo and Asus RT-N16. I use RT-N16 and I have kept Buffalo WHR as backup. AT random times I cannot get access to Internet and router webgui. But it accepts ping requests. SOmetimes if I reboot the router it gets solved, but most of the times rebooting also doesn't help. Very strangely most of the times it happens between 11 am and 1 pm. I have about 180 pc's and 6 wireless access points (with no authentication) which provide access to 100 more laptops and handhelds. I use 255.255.0.0 mask. On an average 50 to 60 users will be accessing internet. I have a 4 Mbp/s up and down link with a static ip. The ISP router, , is in our premises and it shows normal activity even when I am facing the issue. Once I changed the firmware of RT-N16 to DDWRT, but it showed up same issue. I tried with Asus stock firmware, it too showed up same issue. I tested with Netgear WGR614v9, again same thing happened.