I have some about 10 servers running in this moment. The problem that i have is:
I bought specially a stresser [ that they ddos the server ]. And from about 15-20 methods only 3 can DDoS , !! BUT !! they can flood only if use specific port ex: 27015 / 27016
If i DDos 20716 , 20715 and rest are still up without having any problem.