I have run into this same problem with win2003.  You may need to check to see if windows 7 has IPSEC service.
If so, you can set up a blocked list in ipsec that you can add ip addresses to and windows won't let them into your machine.

Click on Start menu
choose Administrative Tools
choose Services
Find IPSEC Services - double click to open properties - make sure it is set to Automatic and started.

You can create the block list by issuing the following commands from a command window:

netsh ipsec static add filteraction name=Block action=block
netsh ipsec static add filter filterlist=BlockList srcaddr=192.168.192.100 dstaddr=me
netsh ipsec static add policy name=Block assign=yes activatedefaultrule=no
netsh ipsec static add rule name=BlockList policy=Block filterlist=BlockList filteraction=Block
netsh ipsec static delete filter filterlist=BlockList srcaddr=192.168.192.100 dstaddr=Me


create a directory called blockip 

now in notepad  create blockip.bat with the following line in it:
netsh ipsec static add filter filterlist=BlockList srcaddr=%1 dstaddr=me

Now , in notepad, create unblockip.bat with the following line in it:
netsh ipsec static delete filter filterlist=BlockList srcaddr=%1 dstaddr=me


to block ip address 123.123.123.123  type    blockip 123.123.123.123      at a command prompt.

to unblock ip address 123.123.123.123  type    unblockip 123.123.123.123      at a command prompt.

You can use xml_curl to keep track of hit frequency and do the blocking for you.


hope that helps....
jack


On 6/13/2012 7:27 PM, ocset wrote: 
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


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