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Command Line Interface
4-88
4
Access Control List Commands
Access Control Lists (ACL) provide packet filtering for IP frames (based on address,
protocol, Layer 4 protocol port number or TCP control code) or any frames (based
on MAC address or Ethernet type). To filter packets, first create an access list, add
the required rules, and then bind the list to a specific port.
Access Control Lists
An ACL is a sequential list of permit or deny conditions that apply to IP addresses,
MAC addresses, or other more specific criteria. This switch tests ingress or egress
packets against the conditions in an ACL one by one. A packet will be accepted as
soon as it matches a permit rule, or dropped as soon as it matches a deny rule. If no
rules match for a list of all permit rules, the packet is dropped; and if no rules match
for a list of all deny rules, the packet is accepted.
There are three filtering modes:
• Standard IP ACL mode (STD-ACL) filters packets based on the source IP address.
• Extended IP ACL mode (EXT-ACL) filters packets based on source or destination
IP address, as well as protocol type and protocol port number. If the TCP protocol
is specified, then you can also filter packets based on the TCP control code.
The following restrictions apply to ACLs:
• Each ACL can have up to 60 rules.
• This switch supports ACLs for ingress filtering only. However, you can only bind
one IP ACL to any port for ingress filtering. In other words, only one ACL can be
bound to an interface - Ingress IP ACL.
The order in which active ACLs are checked is as follows:
1.
User-defined rules in the Ingress IP ACL for ingress ports.
2.
Explicit default rule (permit any any) in the ingress IP ACL for ingress ports.
3.
If no explicit rule is matched, the implicit default is permit all.
Table 4-33. Access Control List Commands
Command Groups
Function
Page
IP ACLs
Configure ACLs based on IP addresses, TCP/UDP port number,
protocol type, and TCP control code
4-89
ACL Information
Display ACLs and associated rules; shows ACLs assigned to each
port
4-95
Summary of Contents for 8124PL2
Page 1: ...MANAGEMENT GUIDE TigerSwitchTM 10 100 1000 24 Port Managed Switch with PoE SMC8124PL2 ...
Page 2: ......
Page 20: ...xvi Contents ...
Page 27: ...xxiii Figures ...
Page 35: ...Introduction 1 8 1 ...
Page 45: ...Initial Configuration 2 10 2 ...
Page 148: ...Port Configuration 3 103 Figure 3 61 Displaying Etherlike and RMON Statistics ...
Page 473: ...Command Line Interface 4 240 4 ...
Page 477: ...Software Specifications A 4 A ...
Page 489: ...Index Index 4 menu list 3 3 panel display 3 3 ...
Page 490: ......