View and modify Nic addresses

1. Simple NIC address modification method
If you access the network through the physical address of the network card, you must modify the physical address. For example, if a new Nic is changed, the physical address of the NIC is repeated, or the laptop is temporarily logged on to the network. Change the MAC address of the NIC Article There are many networks, but most of them are not detailed enough. Next I will try to use the Windows XP operating system as an example to introduce how to modify the MAC addresses of the two NICs. I hope this will help you.

You can right-click the "Network Neighbor" icon on the desktop and select "properties". In the displayed "network connection" dialog box, right-click the "local connection" icon, select "properties". A "Local Connection Properties" dialog box is displayed. Click "Configure" and select "advanced ", select "network address" in the "attribute" column on the left (in fact, not all NICs use "network address" for the physical address description ", for example, Intel's network adapter uses "locally administered address" to describe, as long as the "value" option can be found in the right box ), then, select the single option (not "nonexistent") in the "value" in the right column, and enter the MAC address of the NIC in the box on the right, the format is "000b6af6f4f9 ". Click "OK" to complete the modification.

However, some NICs do not have this option. Do not worry. You can update the NIC Driver first.ProgramTry it. This option will usually appear after the driver is updated. But there are still some special cases. No matter how you modify it, there is no such option. What should we do? Next, let's look at the following method as omnipotent!

Ii. How to Find the MAC address

1. Under Windows 9x/2000/XP, click Start/program and locate MS-DOS mode or command prompt ".

2. Enter "ipconfig/all" at the command prompt, and press enter to display the dialog box shown in the figure. The "physical address" is the MAC address.

To sum up, the first step is to query your NIC address, and the second step is to change to the correct NIC address you have found, so that you can access the Internet.
The addresses in the network can be divided into physical addresses and logical addresses. Compared with the port number at the IP transport layer of the network layer and the user name at the application layer, the MAC address of the LAN is handled by hardware, it is called a physical address or a hardware address. the port number at the IP address transport layer and the user name at the application layer are handled by the software. I think the MAC address you mentioned should be a physical address.
Most local networks identify a networked computer or other device by assigning a hardware address to the NIC. the so-called physical address refers to the address solidified in the network card EPROM. This address should be unique across the network. the IEEE Registration Board assigns each manufacturer the first three bytes of the physical address, namely the company ID. the third byte is allocated by the vendor. that is, the number of NICs that a vendor can produce when obtaining the first three bytes of an address is 16777216. that is, a network card corresponds to a physical address. that is to say, the first three bytes of the corresponding physical address can be known to its manufacturer.
If the address in the NIC is 002514895423, the NIC is inserted into host a, and host a's address is 002514895423, no matter whether host a is connected to lan 1 or LAN 2, no matter where the computer is moved, host a's physical address is 002514895423. it remains unchanged and will not be the same as any other computer in the world. when host a sends a frame, when the NIC executes the sending program, the address is directly written as the source address to the frame. when host a receives a frame, it directly compares the address with the destination address of the received frame to determine whether to receive the frame.
The physical address is generally recorded as 00-25-14-89-54-23 (host a's address is 002514895423
The addresses in the network can be divided into physical addresses and logical addresses. Compared with the port number at the IP transport layer of the network layer and the user name at the application layer, the MAC address of the LAN is handled by hardware, it is called a physical address or a hardware address. the port number at the IP address transport layer and the user name at the application layer are handled by the software. I think the MAC address you mentioned should be a physical address.
Most local networks identify a networked computer or other device by assigning a hardware address to the NIC. the so-called physical address refers to the address solidified in the network card EPROM. This address should be unique across the network. the IEEE Registration Board assigns each manufacturer the first three bytes of the physical address, namely the company ID. the third byte is allocated by the vendor. that is, the number of NICs that a vendor can produce when obtaining the first three bytes of an address is 16777216. that is, a network card corresponds to a physical address. that is to say, the first three bytes of the corresponding physical address can be known to its manufacturer.
If the address in the NIC is 002514895423, the NIC is inserted into host a, and host a's address is 002514895423, no matter whether host a is connected to lan 1 or LAN 2, no matter where the computer is moved, host a's physical address is 002514895423. it remains unchanged and will not be the same as any other computer in the world. when host a sends a frame, when the NIC executes the sending program, the address is directly written as the source address to the frame. when host a receives a frame, it directly compares the address with the destination address of the received frame to determine whether to receive the frame.
The physical address is generally recorded as 00-25-14-89-54-23 (host a's address is 002514895423
The addresses in the network can be divided into physical addresses and logical addresses. Compared with the port number at the IP transport layer of the network layer and the user name at the application layer, the MAC address of the LAN is handled by hardware, it is called a physical address or a hardware address. the port number at the IP address transport layer and the user name at the application layer are handled by the software. I think the MAC address you mentioned should be a physical address.
Most local networks identify a networked computer or other device by assigning a hardware address to the NIC. the so-called physical address refers to the address solidified in the network card EPROM. This address should be unique across the network. the IEEE Registration Board assigns each manufacturer the first three bytes of the physical address, namely the company ID. the third byte is allocated by the vendor. that is, the number of NICs that a vendor can produce when obtaining the first three bytes of an address is 16777216. that is, a network card corresponds to a physical address. that is to say, the first three bytes of the corresponding physical address can be known to its manufacturer.
If the address in the NIC is 002514895423, the NIC is inserted into host a, and host a's address is 002514895423, no matter whether host a is connected to lan 1 or LAN 2, no matter where the computer is moved, host a's physical address is 002514895423. it remains unchanged and will not be the same as any other computer in the world. when host a sends a frame, when the NIC executes the sending program, the address is directly written as the source address to the frame. when host a receives a frame, it directly compares the address with the destination address of the received frame to determine whether to receive the frame.
The physical address is generally recorded as 00-25-14-89-54-23 (host a's address is 002514895423

The addresses in the network can be divided into physical addresses and logical addresses. Compared with the port number at the IP transport layer of the network layer and the user name at the application layer, the MAC address of the LAN is handled by hardware, it is called a physical address or a hardware address. the port number at the IP address transport layer and the user name at the application layer are handled by the software. I think the MAC address you mentioned should be a physical address.
Most local networks identify a networked computer or other device by assigning a hardware address to the NIC. the so-called physical address refers to the address solidified in the network card EPROM. This address should be unique across the network. the IEEE Registration Board assigns each manufacturer the first three bytes of the physical address, namely the company ID. the third byte is allocated by the vendor. that is, the number of NICs that a vendor can produce when obtaining the first three bytes of an address is 16777216. that is, a network card corresponds to a physical address. that is to say, the first three bytes of the corresponding physical address can be known to its manufacturer.
If the address in the NIC is 002514895423, the NIC is inserted into host a, and host a's address is 002514895423, no matter whether host a is connected to lan 1 or LAN 2, no matter where the computer is moved, host a's physical address is 002514895423. it remains unchanged and will not be the same as any other computer in the world. when host a sends a frame, when the NIC executes the sending program, the address is directly written as the source address to the frame. when host a receives a frame, it directly compares the address with the destination address of the received frame to determine whether to receive the frame.
The physical address is generally recorded as 00-25-14-89-54-23 (host a's address is 002514895423
1. simple modification method

In fact, no matter 98 or 2000, we have already provided the function of changing the NIC address, but we do not think about it at ordinary times, so we didn't notice it. It's very simple .....

Now let's take a look at Win2000. Right-click the "Network neighbors" icon on the desktop and select "properties". In the displayed "network and dial-up connections" window, there are usually two icons: "New Connection, one is the "my connections" icon. Of course, if your machine has two NICs, there will be three icons. Now, if you only have one Nic, right-click the "my connections" icon and select "properties". A "My Connection Properties" window is displayed. There is a "configuration" button under the window. Click this button to enter the NIC Properties dialog box. This dialog box contains five properties pages. Click the second "advanced" page, there are two or more items under the "attribute" identifier. Now you should be able to see an attribute item named "network address". Click this item, there are two single options under the "value" icon on the right of the dialog box. The default value is "nonexistent". Now you only need to select the preceding single option, then, enter the MAC address of the network card you want to change in the box on the right (note that you need to enter the network card continuously without "-"), for example, "00e0404000a0", click "OK", OK! You are done!

Modifications under 98 are similar to those under win2000. Right-click the "Network Neighbor" icon and select "properties". A "network" dialog box is displayed. In the "configuration" box, double-click the network card you want to modify and a NIC attribute dialog box is displayed. In the "advanced" option, click "network address" under the "attribute" identifier, and select the preceding one from the two single options on the right, enter the MAC address of the network adapter you want to modify in the box. Click "OK" and the system will prompt you to restart. I don't need to talk about it anymore! :) (After restarting, you can use "winipcfg" to check the modification results)

If you want to restore the MAC address of the network card to its original state, you only need to select "not displayed" on the right of the "Network Address" item and restart it. In Win2000, select "non-existent". Of course, you do not need to restart it.

Ii. How to modify the Registry

Due to the relationship between the driver and the network card, some machines do not have the "Network Address" option, so we only need to modify the registry.

◆ Modify Windows2000

1. Search for driverdesc under the primary key of HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ class \ {4d36e972-e325-11ce-bfc1-08002be10318} \ 0000, 0001, 0002, And. The description of the NIC to be modified, for example, "RealTek rtl8029 (AS)-based PCI Ethernet Adapter ".

2. Add a string named networkaddress under it. The value is set to the MAC address you want (note that the address is still written consecutively ). For example, 00e0dde0e0e0.

3. Add a primary key named networkaddress to NDI \ Params and add a string named default under the primary key. The value of this string is the MAC address you want to set and must be written continuously, for example, 000000000000. (In fact, this is only the "Initial Value" in the advanced attribute mentioned later. The actual MAC address used depends on the networkaddress parameter mentioned in. Once this parameter is set, in the future, the value in the advanced attribute is the value given by networkaddress rather than the value given by default .)

4. Add a string named paramdesc under the primary key of networkaddress. The function is to specify the description of the primary key of networkaddress. The value can be named by yourself, for example, "network address ", in this way, the network address option will appear in the Advanced properties of the network adapter, that is, the new networkaddress you just added in the registry. You only need to modify the MAC address here. Add a string named optional with the value set to "1". When you select the network address option in the Advanced properties of the network adapter, the "no" option will appear on the right.

5. Restart your computer, open the network neighbor attributes, and double-click the corresponding Nic item to find an advanced network address setting item, it can be used to directly modify the MAC address or restore the original address.

◆ Modify Win9x

1. Find the driverdesc string under HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ class \ net \ 0000, 0001, and 0002.

2. Add a string named networkaddress under it. The value is set to the MAC address you want. Note that you must write it continuously. For example, 00e0dde0e0e0.

3. Add a primary key named networkaddress to NDI \ Params and add a string named default under the primary key. The value of this string is the MAC address you want to set, note that continuous writing is required, for example, 00e0dde0e0e0.

4. Add a string named paramdesc to specify the description of the nettworkaddress primary key. The value can be named by yourself, for example, "network address". In this way, the attributes of the network neighbor will be opened later, in this way, the network address option will appear in the Advanced properties of the network adapter, that is, the new networkaddress you just added in the registry. You only need to modify the MAC address here.

Add a string named optional with the value set to "1". When you select the network address option in the Advanced properties of the network adapter, the "no display" option will appear on the right.

◆ How to change the NIC address in winnt:

1. Open the registry and locate HKEY_LOCAL_MACHINE-> system-> CurrentControlSet-> services

2. Find the NIC key value and add the string value networkaddress to the parameters item. The value is set to the MAC address to be modified, for example, "00e0dde0e0e0 ".