DD-WRT wake up

1. What is Wol wake-up on the network:

The so-called network wake-up means that even if a computer in the network is shut down, as long as it is connected to the power supply, it can activate the network card through a fixed format of UDP packets, so that the computer can start again. Automatic startup is achieved without manual power buttons.

Ii. Purpose of the wol wake-up function:

The Wol wake-up function is mainly used for remote management. For example, if my computer is in the control state of my home computer, there is no way to implement this function. However, the wol wake-up function can send fixed-format UDP wake-up data packets to the computer, so as to enable the computer to start up in the unit control home. In short, the wol wake-up function is mainly used for remote management and remote maintenance.

3. DD-WRT network wake-up Wol function:

Some readers may wonder if the computer Nic supports the wol wake-up function? What are the advantages of DD-WRT's network wake-up? In fact, the network wake-up function in the DD-WRT can make it easier for us to manage and wake up the computer, in addition to the actual application of network wake-up is based on remote operations, in this case, how can I obtain the MAC address and IP address of the remote computer, or even the dynamic IP address of the home ADSL automatic dialing?

We only need to ensure that the DD-WRT is continuously connected to the network. On the one hand, the DD-WRT device connection network IP address will not change, from the remote connection to this address can be; on the other hand, the DD-WRT has ddns function, even if the IP address changes after the dial, we can still access the DD-WRT device by setting the ddns domain name, thus avoiding the dynamic IP can not be smoothly connected to the problem.

4. Set the network wake-up Wol function of DD-WRT:

Set the network wake-up Wol function for the DD-WRT to take the following steps.

Step 1: Set the computer to enable the remote Wol function. First, we need to enable the wol function of the computer's own network, which is usually set in bios. Most computers are enabled by default. If you find that the wol automatic wake-up function still cannot be implemented on your computer after completing the following steps, you need to start with BIOS. Generally, you can view the wol option in the bios and set it to the Enable option.

TIPS:
Some old computers may not support the wol wake-up function. In this case, there is no other way.

Step 2: Access the DD-WRT management interface, the default address is 192.168.1.1, the reader can access according to the actual situation. Enter the administrator username and password to log on.

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Step 3: Go to the DD-WRT management interface and select "Wol network wake up" under the "manage" tab, here we will see the available host that has appeared, these computers are the computer information that once connected to the DD-WRT device and assigned the corresponding IP address, including MAC address, host name and IP address information. By default, the corresponding "enable Wol" information is not selected.

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Step 4: Use the ipconfig/all command to query the machine that is connected to the DD-WRT computer to see that all information in the DD-WRT record is correct.

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Step 5: for example, the author wants to connect to the computer DD-WRT device to enable Wol network wake-up function, then only need to corresponding information on the right of the "enable Wol" checked.

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Step 6: After selecting this option, we will see the corresponding host address in the following Wol address information. Each address corresponds to a "wake up" button on the right.

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Step 7: You can also manually add a host, and enter the corresponding MAC address, IP address, and UDP port number through "manual Wol" below to manually wake up a computer.

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TIPS:
Because the network wake-up data packet must use UDP data packets, we need to set a port used by UDP data packets during the wake-up operation. We can enter the port at will. For example, I entered 4000.

In actual use, we only need to click the "wake up" button of the corresponding computer in Figure 5 to automatically wake up when the computer is disabled. If we remotely log on to the DD-WRT device from the network, we can further wake up the remote host to achieve remote management.

5. advanced use of Wol wake-up:

Of course, the wol wake-up function also has many extended applications. For example, to prevent the computer from automatically shutting down due to power failure, we can set Automatic send of automatic wake-up data packets.

Step 1: log on to the management interface of the DD-WRT, find common management under the manage tab, and find the network wake up option in the tab, set Wol to "enable ".

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Step 2: Then you need to set parameters for the network wake-up function, including the interval between sending the network wake-up UDP packet, which is 1 second to 86400 seconds. We can set the parameters according to the actual situation, the author adds 30 seconds. Next, set the Host Name and MAC address that you want to automatically wake up at intervals. Save the settings and exit.

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Step 3: after exiting, the corresponding computer will be automatically started every 30 seconds after it is shut down because it receives the network wake-up packet, thus avoiding problems caused by power failure.

Vi. Summary:

The Wol network wake-up function can play a major role in critical times, helping our users better manage computers through the network, and truly achieve the complete and smooth connection between the unit computer and the home device.