How Cloudflare blocked a monumental 7.3 Tbps DDoS attack

A DDoS gets some fraction of the entire internet to attack a single host.

As the internet gets more users and more devices connected, the ratio of DDoS volume to a single connections volume will only get larger.

Is there any kind of solution?

Not a 100% solution but would help greatly if ISPs:

1) performed egress filtering to prevent spoofing arbitrary source addresses

2) temporarily shut off customers that are sending a large volume of malicious traffic

> sending a large volume of malicious traffic

How would an ISP determine egress is malicious? Genuinely curious.

If someone is reporting malicious traffic coming from the ISP's network then an ISP should be obligated to investigate and shut off the offending customer if necessary until they've resolved the problem.

How would this ever work at scale? These attacks come from thousands of compromised devices usually. e.g. Someone's smart fridge with 5 year old firmware gets exploited