Geht um die IPFW!
Code:
IPF="ipfw -q add" ipfw -q -f flush #loopback $IPF 10 allow all from any to any via lo0 $IPF 20 deny all from any to 127.0.0.0/8 $IPF 30 deny all from 127.0.0.0/8 to any $IPF 40 deny tcp from any to any frag # statefull $IPF 50 check-state $IPF 60 allow tcp from any to any established $IPF 70 allow all from any to any out keep-state $IPF 80 allow icmp from any to any # open port ftp (20,21), ssh (22), mail (25) # http (80), dns (53) etc $IPF 110 allow tcp from any to [COLOR="Red"]any[/COLOR] 21 in $IPF 120 allow tcp from any to [COLOR="Red"]any[/COLOR] 21 out $IPF 130 allow tcp from any to [COLOR="Red"]any[/COLOR] 22 in $IPF 140 allow tcp from any to [COLOR="Red"]any[/COLOR] 22 out $IPF 170 allow udp from any to [COLOR="Red"]any[/COLOR] 53 in $IPF 175 allow tcp from any to [COLOR="Red"]any[/COLOR] 53 in $IPF 180 allow udp from any to [COLOR="Red"]any[/COLOR] 53 out $IPF 185 allow tcp from any to [COLOR="Red"]any[/COLOR] 53 out
