Last night I was asked by a family friend to block internet access from their son's DS devices. I figured the simplest way to go about doing this would be to block the MAC address via their router. So I went ahead and did that for his Nintendo DS XL, Nintendo 2DS, and Nintendo DSi.
I had verified that each device was unable to connect to the internet (via trying to access Google.com). This morning I was informed that using (at least) his 2DS, their son was able to access the internet. Now the 2DS was the one I had the most trouble blocking (before I found the MAC address in the system settings) as it didn't show up as NintendoDS in the router like the other two devices.
Is there any reason why his 2DS would be unblocked after I had blocked the MAC address? I noticed there were two unnamed devices, one of which was the 2DS. Does the 2DS happen to have two network chips? Does it have a cellular network chip?
I can guarantee that he was unable to access the router to unblock his devices as I had changed settings with that.
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Again, I had verified that all three devices were blocked. I don't know how else, other than accessing a neighbor's router that he would've been able to connect to the internet. I was told that all the nearby networks were password protected (though I did forget to check as I didn't think it would be an issue).