Security – Any reason not to enable DoS Defense in the router

While Oneiroi's answer starts to get you there. There are a few flaws that deserved more than a comment on his answer.

First, the bandwidth you are actually contending for isn't the back end ethernet link, but the wireless link speed. So on a 54 mbps router you would be contending for that 54 mbps. At 60 clients that would be about 900kbps each, not counting TCP overhead, counting TCP overhead you are already down to ~720kbps.

Secondly, you still have to deal with signal strength issues, which depending on your location could greatly effect throughput.

Thirdly, you have to deal with interference between those 60 radios all trying to broadcast. Years ago when I was working on planning an 802.11b wireless network the engineer we talked to said the rule of thumb was about 10-12 clients per AP for best performance, you can probably move that up to 20-25 (pure off the cuff number)with today's newer technologies. But that still doesn't get you to 60.

I would suggest that you take a look at some pure Wireless APs (not routers) and do a site survey to find the optimal placements for them.

I've had the exact same problem for almost a week. Had to re-dial / reboot the server so many times manually. I just found a possible solution and it has worked fine for past hour.

Log into the router as admin, Firewall >> DoS defense Setup, Unticked "Enable UDP flood defense".