Hi ! I'm new on this forum and I need your help I am the IT guy in a small company. I have a private network, a DSL connexion to internet and a NAT configured between them. I want to prevent users of my company making ddos attacks and spamming. I dont want to block all traffic So I want to limit the number of outgoing connexions to port 25 per natted IP per day for example. I also want to limit the number of simultaneous connexions per users. Also, how to prevent my users making ddos attacks (IE : they run a malicious software) ? Thank's in advance !