In network management, IP address stealing often occurs, not only affects the normal use of the network, but also has a large amount of economic losses and potential security due to the aggressive address. Hidden dangers. Is there any measures to maximize the happening of such phenomena? In order to prevent IP addresses from being stolen, the IP address can be bundled with the NIC address when the IP address is allocated in the proxy server.
For dynamic allocation IP, make a DHCP server to bind the user network card MAC address and IP address, and then set permissions according to different IP settings. For static IP, if you use a three-layer switch, you can do the limit on the IP address on each port of the switch. If someone changed its own IP address, then his network will not pass. We now explain an example for the binding of static IP addresses.
View NIC MAC Address
First click "Start" to select "Run", then enter the WiniPCFG command inside, you can find your own network card address, as shown in the figure:
After the record, let the network administrator make the network administrator to bundle the static IP address of your Internet with the network card address recorded. The specific command is:
ARP -S 192.168.0.4 00-EO-4C-6C-08-75
In this way, the static IP address 192.168.0.4 of the Internet is bound to the network card address is 100-EO-4C-6C-08-75, even if others are stealing your IP address 192.168.0.4; Server Internet. It should be noted that this command is only useful in the LAN's proxy server side, but also a static IP address, like a general Modem dial-up network is a dynamic IP address. Next, we have some simple introduction to the functions of each parameter:
ARP -s -d-a
-s - The corresponding IP address is bundled with the physical address.
-d-- Delete the bundle of the IP address given to the physical address.
-a - The IP address and the corresponding physical address are displayed by querying the ARP protocol table.
As a network manager, if the MAC address and IP binding can be flexibly skilled, create a very safe and advantageous environment, which can greatly reduce safety hazards.
