IP and mac binding refers to associating a specific IP address with a specific MAC address, so that only the device using the MAC address can use the IP address for network communication. Binding ip and mac can prevent the IP address of the bound host from being spoofed. Prerequisites: 1. The MAC address is unique and cannot be spoofed; it can only be bound to hosts on the network directly connected to the router (that is, The host's gateway is on the router).
The operating environment of this tutorial: windows7 system, TL-TR970G, Dell G3 computer.
What does ip and mac binding mean?
IP and MAC binding refers to associating a specific IP address with a specific MAC address , so that only devices using this MAC address can use this IP address for network communication. The purpose of binding ip and mac is to ensure that computers and mobile phones can obtain the same IP address every time they connect to the router to access the Internet.
This mechanism can prevent the IP address of the bound host from being spoofed. There are two prerequisites for applying this mechanism:
1) The MAC address is unique and cannot be counterfeited;
2) It can only be bound to Determine the host on the network directly connected to the router (that is, the host's gateway is on the router).
In addition, multiple IP addresses can be configured on the interface of a host, so there are situations where multiple IP addresses are bound to the same MAC address, but the reverse is not allowed.
In environments with many terminals such as dormitories and companies, setting IP and MAC address binding can prevent problems caused by terminals privately modifying IP addresses and ensure network stability.
In computer networks, IP addresses and MAC addresses are two very important identifiers. An IP address is used to uniquely identify a computer on a network, while a MAC address is used to uniquely identify a computer on a local area network. Therefore, binding IP addresses and MAC addresses can effectively control the access rights of devices in the network.
IP and MAC binding is commonly used in network security, such as network access control, intrusion detection, and network traffic control. By binding a specific IP address to a specific MAC address, you can restrict access to network resources to only authorized devices, making it easier to identify and prevent network attacks.
IP and MAC address binding setting method
Requirements analysis
LAN of a small company There are multiple office computers. Fixed IP addresses have been assigned to the computers. Now they need to be bound on the router, as follows:
Host Name |
MACAddress |
AssignedIPAddress |
##小張 |
| ##192.168.1.101
|
| 小李 ##08-XX-XX-XX-XX -86 |
##192.168.1.100 |
|
50-XX-XX-XX-XX-BD |
192.168.1.102 |
Setting steps
- Step one: Enter the setting interface
- Step 2: Add mapping entries
Q&A
1. After the binding is set, can I change the IP on my computer to access the Internet? Answer: Yes. Because it is equivalent to ordinary binding, if the computer changes the IP address to an address outside the binding list, it can still access the Internet. 2. Can unbound hosts access the Internet? Answer: If a certain host is not bound, you can access the Internet normally. 3. Is two-way binding required? Answer: Two-way binding can reduce the risk of ARP spoofing to a greater extent, but due to the diversity of terminals (more mobile terminals), it is not easy to bind the gateway IP and MAC in the terminal, such as The network size is small and setting is not recommended. For more related knowledge, please visit theFAQ column!
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