Most common Cisco Access-list

·         Standard ACL

·         Extended ACL

Standard ACL

Configure terminal

Access-list 1

Permit 10.1.12.0 0.0.0.255

interface fa 0/1
ip access-group 1 out

In this configuration, 
permit 10.1.12.0/24 to go out "interface fa 0/1".

Extended ACL

Configure terminal
access-list 101 permit tcp host 10.1.12.1 host 192.168.1.1 eq 25

from host 10.1.12.1
to host 192.168.1.1
permit tcp port 25