15 Access Control Lists

the “TCP” protocol is specified, then you can also filter packets based on the TCP control code.

IPv6 Standard: IPv6 ACL mode that filters packets based on the source IPv6 address.

IPv6 Extended: IPv6 ACL mode that filters packets based on the destination IP address, as well as the type of the next header and the flow label (i.e., a request for special handling by IPv6 routers).

MAC: MAC ACL mode that filters packets based on the source or destination MAC address and the Ethernet frame type (RFC 1060).

Web – Click Security, ACL, Configuration. Enter an ACL name in the Name field, select the list type (IP Standard, IP Extended, MAC, IPv6 Standard, IPv6 Extended), and click Add to open the configuration page for the new list.

Figure 15-1 Selecting ACL Type

CLI – This example creates a standard IP ACL named bill.

Console(config)#access-list ip standard bill

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Console(config-std-acl)#

 

 

 

Configuring a Standard IPv4 ACL

Command Attributes

Action – An ACL can contain any combination of permit or deny rules.

Address Type – Specifies the source IP address. Use “Any” to include all possible addresses, “Host” to specify a specific host address in the Address field, or “IP” to specify a range of addresses with the Address and SubMask fields. (Options: Any, Host, IP; Default: Any)

IP Address – Source IP address.

Subnet Mask – A subnet mask containing four integers from 0 to 255, each separated by a period. The mask uses 1 bits to indicate “match” and 0 bits to indicate “ignore.” The mask is bitwise ANDed with the specified source IP address, and compared with the address for each IP packet entering the port(s) to which this ACL has been assigned.

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Accton Technology ES4548D Configuring a Standard IPv4 ACL, CLI This example creates a standard IP ACL named bill, 44-2