How to prevent and reject a DDos atack

Is possible to prevent a DDos atack, and is easy to manage a DDos atack.
yesterday my rdio suffered an attack, my provider told me before that his company has a filter, so I asked yesterday why my radio was down and he answered: is a huge attack thats why

well thanks in advance for explanations

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Yes you buy servers with added security

and this security is enought if you suffer a DDOS attack?

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You can tap a third party to address DDOS attack. Prolexic http://www.prolexic.com/ is one option. It entails costs but this is a must for any high traffic ecommerce site.

You can use syncookies. Look at http://cr.yp.to/syncookies.html

We offer box security with includes Access tracking and DOS protection. $50/hour though.

If you dont have the budget to pay the professionals, I suggest you pick your services carefully, and be careful who you make enemies with.

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Thanks for all help. I have problems everyday with DDos attacks or ppl who try to access ssh, will have to make a move

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Anti DDOS service seems to be very expensive. Are there doable ways which can be done to address DDOS attacks? These are doable ways which even novice administrators can undertake.

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Well you have to install firewalls, Brutal force detection, APF and conf iptables or stuff like that.

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There are DDoS scripts that you can setup that when an IP connects to your server over x amount of times, it will ban it.