How to prevent a DoS attack on NT!?

Hi

I was just wondering what is the best way to prevent the DoS attack on NT server, we have over four NT server and at least once or twice a month we get a some sort of DoS attack either massive http requests or MS SQL worms attack in one of the server which will result a slow network or almost downtime for all the servers that are sharing the same switch or hub.

Is there any software or hardware that we can use to prevent this?

P.S. all the servers are being up dated with the latest MS security patches and upgrades, but still we get lots of attacks.

any help is appreciated.

 

 

 

 

Top