Perhaps you could improve your site's survivability by colocating or otherwise hosting it. That is, take the T1's out of the picture... The economics of DDoS mitigation may change in your favor too. Changing our policy to not support irc is one of the best things we did. I've always felt DDoS defense is just part of providing a good network to my customers. Chris Florian Weimer:
* John Neiberger:
Protect thyself how? For DDoS protection to work, the nasty traffic must be stopped before it gets to my access circuits. Once it gets close enough for me to do anything about it directly it's too late.
It depends. Quite a few DoS attacks are not based on bandwidth saturation or network device overload. On the other hand, if you address the easy ones within your own network, the attackers might switch to types which you can't deal with on your own. 8-(
Anyway, you should examine *why* you (or your customers) are attacked, and address that. Everything else is likely cost-effective. Of course, this might mean you have to do without some revenue if you have customers that are DoS magnets for some reason.