i read in config server firewall something like that many ips blocked in iptables a flood of ips can cause dos by iptables, meaning some overload or something. im not sure if its true. But i want to ask how i can see how much ips blocked in iptables is too much? where can i check it. Is there any hard limit or how to determine acceptable number keeping in ming that i have 6x2.2Ghz cpu and 8gb ram + basic 7k rpm disk?