DynamicACL application skills

Welcome to the network technology community forum and interact with 2 million technical staff. In CCNA and NP, we learned about ACL-Cisco provides a security means for network access, it is a program running on cisco ios. The traditional ACL is divided into three categories: Standard ACL extended ACL named ACL. Here we will review it briefly: Ciscorouterscan

Welcome to the network technology community forum and interact with 2 million technical staff> go to CCNA and NP. We learned about ACL-Cisco provides a security means for network access, it is a program running on cisco ios. The traditional ACL is divided into three categories: Standard ACL, extended ACL, and named ACL. Here we will review it briefly: Cisco routers can

Welcome to the network technology community forum and interact with 2 million technical staff> enter

In CCNA and NP, we learned about ACL-CISCO provides a security means for network access. It is a program running on cisco ios. The traditional ACL is divided into three categories: Standard ACL, extended ACL, and named ACL. Here we will review it briefly:

Cisco routers can identify access-list using two methods:

Access-list number-the number of the access list determines what protocol it is filtering:

-(1-99) and (1300-1399)-standard IP access list

-- (100-199) and (2000-2699) -- extended IP access list

Access list name (IOS versions gt 11.2)

Names contain alphanumeric characters

Names connot contain spaces or punctuation and must begin with alphabetic character

The name access list can contain numbers and letters, but it cannot contain spaces and punctuation marks, and the first character is a letter.

Cisco router support two basic types of IP access lists:

-Standard-Filter IP packets based on the source address only.

The standard access list filters out source IP addresses.

-- Extended-Fiter IP packets based on several attributes. including:

-Protocol type.

-Source and desination IP address

-Source and destination TCP/UDP ports

-ICMP and IGMP message types.

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