Xr700 and constant dos attacks in log with internet loss

Thanks for the reply. I am quite certain that its attacks that kill the internet because like I said it only happens when my son plays that game. With that being said though...yesterday and today he started making sure he is always appearing offline when he plays and we havent had any attacks for the past day & a half so we'll see if the trend continues. I thought about going in and swapping out my cable modem or seeing if they can just issue it a new ip if apearing offline continues working and telling him that he can only play that game appearing offline or dont play it at all and hopefully we could stay clean. 

I am no expert again but to answer your questions the best I can. No the dmz is not being used and yes the geo filter is. There are 4 xboxes that can all get open nat except when some are playing the same game then one boxes game nat may go moderate but thats pretty typical from what i've seen. Only 3 of the 4 boxes are in the geo filter though. I cant really say anything about any issues related to performance of the router outside of the dropping some connections at dhcp lease change time (doesnt happen to every device everytime but its still annoying).

Other than that the kids fuss about occasional lag spikes but from what i've seen thats mostly around lease change time as well and mostly hits every one of their boxes cuz they will simultaneously complain from their rooms and sometimes one will get booted off and others wont. Leases also occur in the log at multiple random times throughout the day even though they say once every 24 hrs.

i guess in the end I was just hoping and wondering if there was any help thru the router or other means to stop the nonsense of someone bein able to disrupt our internet like they've been. The lease change internet disruptions are annoying but secondary to he 'attacks.'