I had three DoSS since January, it sucks, because we had to spend a lot of money on countermeasures like firewalls and bigger internet connections.

ultimately, no. If the attack is strong enough, it will overcome any measures.

wow..that sucks...how can i firewall my site? is there like a link to a site that gives you a porgram or something? and bigger internet connections you mean bandwidth right?

Yes, there are firewalls you can use, but it doesn't necessarily mean someone cannot attack your site. It's like a computer, you can use firewall software, but that doesn't mean you still cannot get infected, it just helps to stop an attack being more likely, or better put stop someone hacking your site more easier.

Install a firewall onto your server - you will need remote access (eg. SSH), to do this.