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4-125

Command Mode
Standard ACL
Command Usage
New rules are appended to the end of the list.
Address bitmasks are similar to a subnet mask, containing four integers
from 0 to 255, each separated by a period. The binary mask uses 1 bits
to indicate “match” and 0 bits to indicate “ignore.” The bitmask is
bitwise ANDed with the specified source IP address, and then compared
with the address for each IP packet entering the port(s) to which this
ACL has been assigned.
Example
This example configures one permit rule for the specific address 10.1.1.21
and another rule for the address range 168.92.16.x – 168.92.31.x using a
bitmask.
Related Commands
access-list ip (4-123)

permit, deny (Extended ACL)

This command adds a rule to an Extended IP ACL. The rule sets a filter
condition for packets with specific source or destination IP addresses,
protocol types, source or destination protocol ports, or TCP control codes.
Use the no form to remove a rule.
Syntax
[no] {permit | deny} [protocol-number | udp]
{any | source address-bitmask | host source}
{any | destination address-bitmask | host destination}
[precedence precedence] [tos tos] [dscp dscp]
[source-port sport [bitmask]] [destination-port dport [port-bitmask]]
Console(config-std-acl)#permit host 10.1.1.21
Console(config-std-acl)#permit 168.92.16.0 255.255.240.0
Console(config-std-acl)#