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Anonymous users2024-02-061. Standard IP access list
The access control list, numbered from 1 to 99, is a standard IP access control list.
2. Expand IP access
The access control list numbered from 100 to 199 is an extended IP access control list.
3. Named IP access
4. Standard IPX access
The number range of the standard IPX access control list is 800-899.
5. Expand IPX access
The number range of the extended IPX access control list is 900-999.
6. Named IPX access
Like named IP access control lists, named IPX access control lists use the list name instead of the list number.
Related information. ACL technology can effectively control the access of network users to network resources at three layers, it can be specific to the network application between two network devices, and can also carry out large-scale access control management according to the network segment, providing an effective security means for network applications.
On the one hand, ACL technology is used to clarify the IP subnet where each host and workstation is located and confirm the access relationship between them, which is suitable for networks with a limited number of network terminals. For large networks, a lot of IP address resources have to be wasted in order to complete some access control. At the same time, the huge number of network terminals will also increase the complexity and difficulty of management.
On the other hand, maintaining the ACL is not only time-consuming, but also increases the router overhead to a large extent. The access control list is very strategic and involves the overall planning of the network, and its use requires a high technical quality of the personnel who formulate policies and plan the network. Therefore, whether to adopt ACL technology and to what extent it can be leveraged is a trade-off between management benefits and cybersecurity.
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Anonymous users2024-02-05One is the basic ACL, and the other is the extended ACL configuration with different numeric numbers, as well as the source and host addresses and ports
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Anonymous users2024-02-041. The concept is different.
2. The application interface is different.
3. The table number is different.
Standard Access Control List: The access control list number is 1-99.
Extended Access Control List: The access control list number is 100-199.
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Anonymous users2024-02-03Standard Access Control List:
Packets are allowed or denied based on their source IP address. The access control list number is 1-99.
Extended Access Control Lists:
Packets are allowed or denied based on their source IP address, destination IP address, specified protocol, port, and flag. The access control list number is 100-199.
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Anonymous users2024-02-02The standard control list should be applied to the interface close to the destination address as far as possible;
Extended control lists should be applied as close to the source as possible on the interface;
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Anonymous users2024-02-011. The role of the access control list:
1. Limit network traffic and improve network performance.
2. Provide means of control of communication flow.
3. Provide basic security means for network access.
4. At the interface of the network equipment, it is decided that the communication traffic is ** or blocked.
2. Composition of the Access Control List:
1. Standard IP access listA standard IP access control list matches the source address or part of the source address in the IP package, and two operations can be taken to reject or allow the friend search chain for the matching package.
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Anonymous users2024-01-31Answer]: An Access Control List (ACL) is a list of instructions applied to a router interface. These lists of instructions are used to tell the router which packets can be received and which packets need to be rejected by the chain.
Whether a packet is received or rejected can be determined by specific indications such as source address, destination address, port number, and so on. In the router global configuration mode, an access control list should be established, and the access control list should also meet the following requirements:The number of the access list indicates what protocol the access list is used?
Each port, each direction, and each protocol can only correspond to one access list? What does the content of the access list determine the order in which the data is controlled? Should statements with strict constraints be placed at the top of all statements in the access list?
There is an implicit statement at the end of the access list: deny any There should be at least one allow statement for every correct access list? Create an access list and then apply it to the port?
The access list cannot be filtered through the data generated by the router itself.
The basic methods of control are:
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