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I’m surprised no place uses IP addresses anymore to authenticate (I was around when Postopia did or whatever that candy themed game place was). Many IP-ban when it comes to identifying rulebreakers, you’d think they’d IP-authenticate too.
All major services do risk based authentication these days. I’m fairly certain network address factors into the risk calculations.
Imagine if your roommate could just get into all your accounts?
I know that’s untactical, but I mean as long as IP bans are already a thing…
Carrier grade NAT. For instance, on our local mobile phone network, thousands of handsets will have the same public IP address.
