Implementando Listas de Acesso
access-list 101 deny tcp any any range 6000 6003
access-list 101 deny tcp any any range 2000 2003
access-list 101 deny tcp any any eq 2049
access-list 101 deny udp any any eq 2049
ip address 200.200.20.2 255.255.255.0
access-list 2 permit 131.108.0.0 0.0.255.255