Cisco IOS - Internet ACL Template
!------------------------------------------ ! -- Internet ACL Settings !------------------------------------------ !-- This template blocks all spoofed private IPs and VoIP protocols to prevent toll-fraud ip access-list extended [[Public ACL]] deny ip 127.0.0.0 0.255.255.255 any log deny ip 192.168.0.0 0.0.255.255 any log deny ip 172.16.0.0 0.0.15.255 any log deny ip 10.0.0.0 0.255.255.255 any log deny udp any any range 5060 5061 log deny tcp any any range 5060 5061 log deny tcp any any range 1720 1721 log deny udp any any range 1720 1721 log permit ip any any interface [[Outside Interface (Gi0/1)]] ip access-group [[Public ACL]] in



Public ACL:
Outside Interface (Gi0/1):


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