Linked Questions

8
votes
8answers
14k views

How to prevent a LOIC (DDOS) attack? [duplicate]

The program LOIC (in the news a lot the last days) causes a lot of damage. What can I do on my server to prevent this kind of attacks? Auto-block ip when receive a strange connection? Because mostly ...
8
votes
6answers
617 views

DDoS. Are we that helpless? [duplicate]

With recent DDoS incidents related to wikileaks, I can't help but feel that pretty much all sites online are very vulnerable to such attacks. Visa, MasterCard (to name a few) have shut down because of ...
6
votes
2answers
11k views

Too many TIME_WAIT state connections! [duplicate]

I've been reading about this everywhere all day, and from what I've gathered, TIME_WAIT is a relatively harmless state. It's supposed to be harmless even when there's too many. But if they're jumping ...
6
votes
5answers
1k views

DDoS Protection Services - are they good enough? [duplicate]

first of all, I understand that it's better to have DDoS protections on data center level. But our DC is not ready to provide good quality of protection. So we thinking about using some external DDoS ...
5
votes
3answers
2k views

DDOS using ntp server

I've heard about new kind of DDOS where ntp is used for reflection . My questions are really simple : Can you please give details on how they work and clarify? Since ntp is ran over UDP, I suppose ...
5
votes
4answers
2k views

Mitigate DDoS attack with HAProxy [duplicate]

We were targeted earlier today by a DDoS attack. There was 20x as many connections as normal on our load balancer (HAProxy), and all the backend nodes continued to go down during this attack. System ...
4
votes
3answers
768 views

100mb/s upgrade to 1gbps network - To Prevent DDOS [duplicate]

I have been under constant DDOS attack the last couple of weeks. Now it seems my servers network is being flooded till it just doesn't have space anymore to receive and send normal packages. I run ...
4
votes
3answers
513 views

Can't stop DDOS [duplicate]

I need a little help dealing with ddos. I'm experiencing 1gb ddos attack on my server and I don't know how to stop it. (1gbs is the maximum speed of the server.) I've the following iptables rules: ...
4
votes
6answers
2k views

How to survive anonymous DDOS attack? [duplicate]

Every time the anonymous group targets a website, they are able to take it down.. even for large corporates / governments with professional. I read (basic theory) about dealing with normal DDOS ...
4
votes
2answers
356 views

How to prevent DDoS attacks? [duplicate]

I am a creator of a flash game server. I use cloudflare for my site, however the game tcp server cant be protected by CloudFlare. For about 2 months some person DDoSes my game using direct ip. Every ...
4
votes
2answers
6k views

How Can I Harden the TCP/IP Stack in Windows Server 2008? [duplicate]

I would like to make sure that my Windows 2008 servers are hardened against DDOS attacks. There is a Microsoft Technet article on Hardening the TCP/IP stack, but it was last revised in January 2006. ...
4
votes
3answers
379 views

I know how to scale my software, but how to prevent downtime because of network outages? [duplicate]

We are running rather large LAMP sites which scale well software wise. We use redundant load balancers in front of a bunch of webservers using MySQL via a proxy in master-slave-slave-slave. We are ...
4
votes
2answers
895 views

DDOS attack - How to prevent [duplicate]

Recently I read about Denial of Service attack on Amazon & PayPal. I am curious that how this is performed. These big companies must have huge servers, so DOS would require billions of bots to ...
4
votes
2answers
947 views

DDoS and Heroku [duplicate]

I use Heroku as my hosting solution. So, if some bad man attacks my site with DDoS, what should I do?

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