Spammers cheat bruteforce monitor

[eSupport.org.ua]

Hi

I found a plate of similar lines in my log:
2013-12-17 18:55:45 login authenticator failed for ([192.168.2.33]) [201.203.113.66]: 535 Incorrect authentication data (set_id=accoun
t)
2013-12-17 18:55:45 login authenticator failed for ([192.168.2.33]) [201.203.3.10]: 535 Incorrect authentication data (set_id=account)
2013-12-17 18:55:45 login authenticator failed for ([192.168.2.33]) [201.203.113.66]: 535 Incorrect authentication data (set_id=accoun
t)
2013-12-17 18:55:45 login authenticator failed for ([192.168.2.33]) [201.203.3.10]: 535 Incorrect authentication data (set_id=account)
2013-12-17 18:55:46 login authenticator failed for ([192.168.2.33]) [201.203.113.66]: 535 Incorrect authentication data (set_id=accoun
t)
2013-12-17 18:55:46 login authenticator failed for ([192.168.2.33]) [201.203.3.10]: 535 Incorrect authentication data (set_id=account)
2013-12-17 18:55:46 login authenticator failed for ([192.168.2.33]) [201.203.113.66]: 535 Incorrect authentication data (set_id=accoun
t)
2013-12-17 18:55:47 login authenticator failed for ([192.168.2.33]) [201.203.3.10]: 535 Incorrect authentication data (set_id=account)
2013-12-17 18:55:47 login authenticator failed for ([192.168.2.33]) [201.203.113.66]: 535 Incorrect authentication data (set_id=account)


But bruteforce monitor blocked 192.168.2.33 instead real spammers ip (201.203.113). Need fix it.