[Freeswitch-users] Brute-force attack

Hi I have deployed Freeswiitch on windows 7 and since there is no fail2ban on windows, I was wondering what the real risk is with opening it up to the internet. If I was to ensure that all users and passwords were extremely difficult to guess (passwords like "2$53E_d7?^2!3s$"), what are the risks that I am exposing myself to? Is there a type of DoS for voip where hackers can just flood my system with requests simply to be malicious? There are VB windows scripts available that emulate what fail2ban does on Linux but I was just wondering whether I really need to implement this level of security if I can control the password complexity in Freeswitch. Thanks O