<div dir="ltr"><div class="gmail_quote"><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
I think we can put the devices in our own network to protect such attacks.<br></blockquote><div> </div><div>Sorry. I think no such kind of devices effective for your university, IMHO. Usually anti-DoS solution providers are able to undertake huge amont traffic and clean them bacause they can utilize huge amout of network resouce like bandwidth, strong load-balancer and clusters, muliple IDC in different regions etc. </div><div><br></div><div>In your case, the bottleneck is on the server and its interface. You can build your nameserver clusters with free software as I suggested.</div><div><br></div><div>Davey </div></div></div>