Protection Against Home Router DDoS
My friend is a live streamer on Twitch, and whenever he plays on Nintendo online with viewers, there is one viewer who has been sneaking in, somehow obtaining his IP address (Nintendo online security flaws?) and DDOSing his, shutting down his internet. So far every time it's happened, he has had to call his ISP and request they manually change his IP to end the attack. This is not my area of expertise, but I really want to help him. Does anyone have any advice? Is there a relatively simple way to Geoblock traffic outside a few select countries (USA, CA, UK, etc.)? Any help appreciated!
Blocking traffic won't help if the size of the DDoS is larger than his pipe.
A VPN to a provider with a lot of bandwidth might help if Nintendo online can still work that way.
I don't think that is a direct connection and it's all to Nintendo servers. Should be based on the Nintendo ID.