Comment by viraptor
4 hours ago
> you need to configure your webserver to rate limit stuff that suck bandwidth/CPU from you
This works for cases where the traffic takes too long to process. Once you get 3gbit traffic on your 1gbit link, you can't do anything yourself - the only thing that can save you is a bigger pipe.
> Once you get 3gbit traffic on your 1gbit link, you can't do anything yourself - the only thing that can save you is a bigger pipe.
Realistically, out of the DDoS we typically see, how many are in fact "they had bigger pipes than you"? I've come across that once in my ~3 decade career maintaining infrastructure for websites, some quite popular. Most of the time the attacks are relatively low-effort and easy to stave away, there been one time when the attacker seemed to have basically endless amount of resources, and yes, that time we ended up with emergency calls to Akamai.
But again, those sort of attacks seem to happen seldom, and I don't think people should default to trying to prevent them. Deal with that once you get there, because most websites and services never get there in the first.
It's quite standard these days. If you're already with Akamai then you're not an attractive target though, so maybe that's why you haven't seen many of those? The DDoS services are really cheap today and it's pretty normal to get attacked regularly if you're large enough. For $100 you can easily get 5gbps for a few days, or larger volume / shorter time for <$50 subscription. But there's no reason to attack anyone already on a quality CDN service.
> and I don't think people should default to trying to prevent them.
It's the usual instance calculation - how much will you lose if you're down for a day vs how much would you pay per month. Some people will not care, some will happily pay tens of thousands.
Then there's business specific stuff. It would extremely hurt a florist to go offline for a week before Valentine's Day. (If they take online reservations)
I was curious and it seems like smaller businesses do get DDoSed, ~5% of them in Canada:
https://www.bdc.ca/en/articles-tools/blog/cyberattacks-small...
That graph is useful for the people who think DDoS is the biggest issue or even a big issue typically: https://www.bdc.ca/globalassets/digizuite/55250-canadian-sma... "Percentage of Canadian small businesses that have experienced a cybersecurity incident"
The data from the graph: Phishing 61%; Malware 27%; Network intrusion 12%; Ransomware 12%; Data breach 7%; DDoS 5%; No cybersecurity incident 27%.
2 replies →
For small businesses? None. Nobody is ddosing a cake shop and if they do, the cake shop doesn't really care enough, because their business is in the store not online, and can afford to let the ddoser waste their money for a few days.
Wouldn't most udp reflection attacks be bigger than your pipe?
Dozens and dozens of times. And having the bigger pipe has always saved it, along with the supporting infrastructure to churn through that traffic.
> But again, those sort of attacks seem to happen seldom
[citation needed] and direct experience suggests otherwise. The wider internet is a cesspool and you never know the inanity that will spur a bored, annoyed script kiddie with some booter credits to take it out on the local cake shop, like another commenter put it.