Linked Questions

79
votes
5answers
89k views

How do major sites prevent DDoS? [duplicate]

As far as I know, I have never heard of or seen any large scale web sites like Amazon, Microsoft, Apple, Google, or Ebay ever suffer from DDoS. Have you? I have a personal philosophy that the bigger ...
0
votes
1answer
5k views

What methods are there of protecting a VPS from DDOS attacks? [duplicate]

I was just wondering what would be the best way to stop a VPS from being attacked, bandwidth would be a problem in this case so methods that reduce the amount of incoming attacks and stop sending ...
2
votes
0answers
52 views

I'm receiving a DDOS attack. What to do? [duplicate]

Yesterday, my website bandwidth got over. After seeing the logs I saw this This request came every 1 second (Different IP's). Luckily I use Cloudflare. So my question is what are the other things ...
24
votes
6answers
5k views

Why do DDoS attacks cost a fortune to stop?

I have read so many stories that a major DDoS attack is causing companies thousands of dollars to mitigate. I have two questions: Is this because they try to keep the servers accessible to real site ...
32
votes
3answers
12k views

How do DoS/DDoS work?

In the last days one could frequently read about attacks from anonymous and LulzSec against different platforms like Sony or HBGary etc. Yesterday for example they DDoS'ed soca.gov.uk and jhw.gov.cn. ...
16
votes
6answers
10k views

What is a DoS Attack and how does it differ from a DDoS attack?

Can someone explain to me the concept of DoS attacks for web applications? Also, what is the distinction between DoS and Distributed DoS (i.e. DDoS) attacks? Wikipedia says: In computing, a denial-...
18
votes
4answers
8k views

Accessing a site (which is) under a DDoS

Lets say http://www.an-example-site.com is under DDoS attack. Alice, who does not have direct access to the hardware infrastructure, urgently wants some information which can be accessed through the ...
3
votes
1answer
4k views

How to secure a website against a ping of death attack?

I found this video in which they talk about crashing a website with a Ping Of Death (PoD) attack, using cmd only. How to secure a website against this type of denial-of-service (DoS) attack? I ...
4
votes
2answers
4k views

DDoS Protection for DNS providers

Zerigo, our DNS provider has reported to have been under heavy DDOS attack in the last 24 hours or so. Considering the distributed nature of DNS, and their architecture consisting of 5 main DNS ...
7
votes
2answers
2k views

I'm having a DDoS attack, my hosting company is not giving me a solution, and I need to know what is hapening

So ok, right now my windows 2003 dedicated server is under attack by some guy who's flooding UDP packets (~90.000 packets/sec) on my 100Mbps server for the last 8 hours. I'm on a shared port, so I'm ...
2
votes
2answers
7k views

How much does it cost to protect your website against DDOS, by tier?

Cross-posted to Quora Today several financial institutes in Israel (banks, stock exchange) were DDOSed. They decided to block all foreign IPs as a first aid measure. While I agree that it was ...
5
votes
4answers
3k views

what is a good public available iptables script for ddos mitigation?

what is a good public available iptables script for ddos mitigation?
4
votes
3answers
2k views

Is there any method to prevent/trace DDoS attack?

I have a Debian Linux server which runs a few online game services. I have some competitors in this area and I think one of them is behind the DDoS attacks. I have full access to the router, so I set ...
2
votes
1answer
3k views

How should I configure a Citrix Netscaler to protect against HTTP, TCP, or UDP flood attacks?

I have a Citrix Netscaler and want to configure the appliance appropriately so that it can protect my hosts from a DDOS. Is this something I can do here, or must I take action on the host itself?
8
votes
1answer
2k views

Securing API against DDoS attacks

I have designed a backend service which is only accessible via a custom REST API. As I understand, services such as CloudFlare are designed to protect HTTPS traffic, and do not apply for custom APIs. ...

15 30 50 per page