4 Command Line Interface

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.

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)#

Related Commands

access-list ip (4-88)

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]]

[no] {permit deny} tcp

{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]] [control-flag control-flagsflag-bitmask]

•protocol-number– A specific protocol number. (Range: 0-255)

•source – Source IP address.

•destination – Destination IP address.

•address-bitmask– Decimal number representing the address bits to match.

•host – Keyword followed by a specific IP address.

•precedence – IP precedence level. (Range: 0-7)

•tos – Type of Service level. (Range: 0-15)

•dscp – DSCP priority level. (Range: 0-63)

•sport – Protocol25 source port number. (Range: 0-65535)

•dport – Protocol25 destination port number. (Range: 0-65535)

•port-bitmask– Decimal number representing the port bits to match. (Range: 0-65535)

•control-flags– Decimal number (representing a bit string) that specifies flag bits in byte 14 of the TCP header. (Range: 0-63)

•flag-bitmask– Decimal number representing the code bits to match.

25.Includes TCP, UDP or other protocol types.

4-90