[opensuse-security] how I can block attacks DoS with Susefirewall2

hi list, few days ago I had an attack in my networks , of several pc infected with virus they sent many connections to my port 25 of my mail server, like I can avoid these attacks ? I was thinking of limiting the connections per seconds at port 25 , like could make this with susefirewall2 ? greetings rickygm --------------------------------------------------------------------- To unsubscribe, e-mail: opensuse-security+unsubscribe@opensuse.org For additional commands, e-mail: opensuse-security+help@opensuse.org