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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
498
• When you create a new ACL or enter configuration mode for an existing ACL, use the permit or deny command to add
new rules to the bottom of the list. To create an ACL, you must add at least one rule to the list.
• To remove a rule, use the no permit or no deny command followed by the exact text of a previously configured rule.
• An ACL can contain up to 100 rules.
Example
Console(config)#access-list ip standard david
Console(config-std-acl)#
Related Commands
permit, deny 4-159 ip access-group
show ip access-list
permit, deny (Standard ACL)
This command adds a rule to a Standard IP ACL. The rule sets a filter condition for packets emanating from the specified source.
Use the no form to remove a rule.
Syntax
[no]{permit | deny}{any | source bitmask | host source}
any – Any source IP address.
source – Source IP address.
bitmask – Decimal number representing the address bits to match.
host – Keyword followed by a specific IP address.
Default Setting
None
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.