DoS protection solutions for Debian Servers ?

[Jean-François Bachelet <jfbachelet@free.fr>]

Hello folks :)

Looking for advice for protecting debian servers from DoS attacks as 
there are more and more of these ones to fight against :/

needless to say that fail2ban isn't enough for this task...

scripts for firewall too... and tiring to make as hackers responses are 
damn' fast to this.

what should we use for datacenter grade DoS protections for our servers 
now  ? appart an army of people glued to their terminals to offer 
realtime answer to treats ;)


what solutions  (free or not) do you debian servers pros use (for pro or 
private servers) ?

Thanks by advance :)

Jeff