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d0k3 over at GBATemp published a list of hostnames the 3DS uses, the two hostnames your 4chan guy posted are on that list, along with a lot more. Check and hosts updates: nus.c.shop.nintendowifi.net nus.cdn.c.shop.nintendowifi.net Connection test: conntest.nintendowifi.net eShop specific: ecs.c.shop.nintendowifi.net cp3s-auth.c.shop.nintendowifi.net Additional: cas.c.shop.nintendowifi.net ccs.c.shop.nintendowifi.net ccs.cdn.c.shop.nintendowifi.net ias.c.shop.nintendowifi.net pls.c.shop.nintendowifi.net npul.c.app.nintendowifi.net cp3s.cdn.nintendowifi.net eou.cdn.nintendowifi.net npdl.cdn.nintendowifi.net Apparently if you block all the above the following won't work: Updating the 3DS FW eShop, as that won't start unless it could check for an update first System Data Transfer, for the same reasons Anything that requires access to the update servers. What works: Browsing the internet Playing online Basically, everything that is not in the 'doesn't work' list will work Theirs certainly no proof either way blocking any of the above will stop the 3DS sending data that will get you banned back to Nintendo, however for people that are going online you could certainly let the 3DS talk to a lot less servers and still have online play functionality by the looks of it.

GAME OVER

Please a shiny or a V-create one