Before I could even answer, they're back up! Not bad.DOS Attacks, aka DDOS Attacks can range from a few minutes to days.
In one case, one of the first DOS Attacks lasted or weeks. The attack was on Register.com. Stated
Here.
Something that's really horrible is how your customers can cause them sometimes. They use one thing called "SQL Injection," using a string of code to "hack" into the server. It brings the server down from the inside!
There's alot of information here:
http://en.wikipedia.org/wiki/DoS_attackThat technology I mentioned seems to not be so popular, but is it growing. Their site is
here. No, its not an affiliate link.
IP Tables uses packet filtering technology to keep commonly known IP address from hackers filtered out, and quickly and effectively keeps out the bad stuff. That's all I know about it. It is also said that it slows down your server LAN speed by a little - 1/50 or something small like that.
The morel of the story is to be appreciative that DOS attacks with HOSTONY and quick and painless. Not like that 2 weeks with Register.com!