What is the purpose of an access-list like the one below?
I know it´s relate to netbios and all the ip address are broadcasts address from client network. I just don´t understand what I am avoiding doing so, relating security issues.
ip access-list extended Local_In
deny udp any host 10.0.0.191 eq netbios-ns
deny udp any host 10.0.0.191 eq netbios-dgm
deny udp any host 10.0.0.255 eq netbios-ns
deny udp any host 10.0.0.255 eq netbios-dgm
deny udp any host 10.0.0.127 eq netbios-ns
deny udp any host 10.0.0.127 eq netbios-dgm
deny udp any host 10.0.255.255 eq netbios-ns
deny udp any host 10.0.255.255 eq netbios-dgm
deny udp any host 10.255.255.255 eq netbios-ns
deny udp any host 10.255.255.255 eq netbios-dgm
deny udp any host 255.255.255.255 eq netbios-ns
deny udp any host 255.255.255.255 eq netbios-dgm
Thanks
Murilo Rocha