OnSite 2800 Series User Manual | 7 • Access control list configuration |
|
|
•All access control lists have an implicit deny ip any any at the end. A packet that does not match the criteria of the first statement is subjected to the criteria of the second statement and so on until the end of the access control list is reached, at which point the packet is dropped.
•Filter types include IP, Internet Control Message Protocol (ICMP), Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Stream Control Transmission Protocol (SCTP).
•An empty access control list is treated as an implicit deny ip any any list.
Note Two or more administrators should not simultaneously edit the con- figuration file. This is especially the case with access lists. Doing this can have unpredictable results.
Once in access control list configuration mode, each command creates a statement in the access control list. When the access control list is applied, the action performed by each statement is one of the following:
•permit statement causes any packet matching the criteria to be accepted.
•deny statement causes any packet matching the criteria to be dropped.
To delete an entire access control list, enter configuration mode and use the no form of the profile acl com- mand, naming the access list to be deleted, e.g. no profile acl name. To unbind an access list from the interface to which it was applied, enter the IP interface mode and use the no form of the access control list command.
Access control list configuration task list
To configure an IP access control list, perform the tasks in the following sections.
•Mapping out the goals of the access control list
•Creating an access control list profile and enter configuration mode (see page 83)
•Adding a filter rule to the current access control list profile (see page 83)
•Adding an ICMP filter rule to the current access control list profile (see page 85)
•Adding a TCP, UDP or SCTP filter rule to the current access control list profile (see page 87)
•Binding and unbinding an access control list profile to an IP interface (see page 89)
•Displaying an access control list profile (see page 90)
•Debugging an access control list profile (see page 90)
Mapping out the goals of the access control list
To create an access control list you must:
•Specify the protocol to be filtered
•Assign a unique name to the access list
•Define
A single access control list can have multiple filtering criteria statements.
Access control list configuration task list | 82 |