Imagine if the hack occurs again, but is more targeted towards things that aren't just minor annoyances, and maybe happens on election night in the U.S.; I mean just earlier this year a repo on a package manager being deleted caused mass failure across the world of applications. A targeted attack on certain assets or dependencies could be very bad indeed. I would argue that GitHub being effected was more important than the other consumer based services in this attack. This is the first of many similar attacks in the coming years.
Why can't a list of addresses of all the devices in the world of the type used in the attack be created, and all packets from any address on the list be trashed? At least, for the duration of the attack.
If such lists were made ahead of time, they could be turned on rapidly.
Is anything like this done?
I, for one, would be fine with a general internet citizen losing access if they have a compromised device. I suspect this is how we will go -- your home security cam was used in an attack, now every single website you visit for XXXXXXXX days gives you a CAPTCHA.
I maintain the crucial element is informing people why they have that hassle. Add extra friction, but not inhibit what they can do, because they are unable and unwilling to secure their devices.
Yes, this affects the internet-uneducated disproportionately. Yes, I think it is the responsibility of anyone with a broadband connection to understand the responsibilities that come with it.
No, I do not expect grandma to learn this. I expect her to deal with a crippled internet because they are not able to fix their pollution.
NAT: blocking an iot address may be blocking grandma's whole network (or her whole apartment complex's network), and the ISP doesn't want that support call.
Dynamic addresses: depending on the ISP, the IP could change quite frequently (daily), so keeping the list up to date to avoid collateral damage to the unlucky recipient of the blacklisted IP is very difficult.
Delving into motives can have the effect of encouraging people who want attention.
[1] https://twitter.com/fbajak/status/789611472280178688 and http://www.anonintelgroup.com/2016/10/21/twitter-down-its-no...
Note: I'm not dismissing the validity of the concern. I'm only reporting that I didn't even know about it as the attack was happening. I'm sure others were much more severely affected.
Note: this isn't something the US can solve. A lot of this traffic came from overseas. It's needs a coordinated response.