Stop SSH brute force attacks

Stop ssh brute
force attack using SuSEfirewall 
 Edit /etc/sysconfig/SuSEfirewall2: 
 do not open ssh ports here 
 FW_SERVICES_EXT_TCP="" 
 FW_CONFIGURATIONS_EXT="" 
 add this rule 
 FW_SERVICES_ACCEPT_EXT="0.0.0.0/0,tcp,22,,hitcount=3,blockseconds=60,recentname=ssh" 
 Restart firewall: 
 rcSuSEfirewall2 restart 
 Now attacker will just have three attempts to break in.