1 2 3 4 5 6 7 | tuonela ~ % host terrakademikon.pl | head -n 1 terrakademikon.pl has address 178.217.184.47 tuonela ~ % sudo ipfw add 20 deny ip from 178.217.184.47 to me 00020 deny ip from 178.217.184.47 to me tuonela ~ % ping terrakademikon.pl PING terrakademikon.pl (178.217.184.47): 56 data bytes 64 bytes from 178.217.184.47: icmp_seq=0 ttl=59 time=14.672 ms |