Why is the wired Internet not connected? Internet does not work when the network cable is connected: why and how to fix it? Replacing the MAC address of the network card

Despite the fact that Wi-Fi and others wireless technologies already quite densely entered our life, many users get the Internet from their providers using a cable connection. Also twisted pairs are also used to create local home or office networks. In this article we will talk about a fairly common problem - the inability to detect the network cable connected to the computer by the system.

As with other attachments, cabling problems can be divided into two groups. The first includes software failures, in particular, incorrectly working network device drivers. The second - various damage and malfunctions of the cable and ports.

Before proceeding with troubleshooting, you can do the following:

• Remove the cable from the connector and plug it in again. If your network card has other ports, then try using them.
• Pay attention to the type of cable. For direct connection of computers, the cross type is used, and for router-PC chains, direct. The system may not be able to automatically determine which pairs the data is going through.

Reason 1: Physical malfunction and damage

In order to make sure that the cable itself is in good working order, first of all, it is necessary to thoroughly inspect it. You need to look for kinks and violations of insulation. Also try connecting another computer or laptop using this cable. Is the situation repeating itself? This means that you have to purchase a new patch cord. However, if you have the appropriate skills and tools, you can replace only the connector and check the functionality.

Another scenario is a malfunction of the network port on a PC or router, or the whole network card... The recommendations here are simple:

Reason 2: Drivers

The roots of this reason lie in the peculiarities of "communication" operating system with equipment. Determine which hardware is connected to the PC, the OS can only use special program- drivers. If the latter does not work correctly or was damaged, or an error occurred when starting it, then the corresponding device will not function normally. There are several ways to fix the problem with the drivers.

The name of the method speaks for itself. We need to "force" the system to stop and start the driver again.

1. We go to the network management section using the command entered in the menu "Run" which, in turn, is launched by the keyboard shortcut Windows + R.

   control.exe / name Microsoft.NetworkandSharingCenter

   

2. Click on the link leading to the adapter settings block.

   

3. Here we are looking for a connection, near which there is an icon with a red cross - « Network cable not connected".

   

4. Right click on the icon and open the properties.

   

5. Push the button "Tune" in the tab "Network".

   

6. Go to the tab "Driver" and click "Delete".

   

   The system will display a warning window in which we click OK.

   

7. We reboot the PC, after which the driver will be installed and started again.

Method 2: update or rollback the driver

The update must be carried out in a comprehensive manner. This means that updating only one NIC driver may not fix the problem. This is due to possible incompatibility software different nodes of the computer. To carry out this procedure, it is recommended to use special software, for example, DriverPack Solution.

Rollback should be applied if a problem occurs after installing a new driver. The steps below will help you recover previous version ON.

Conclusion

As you can see, there are very few reasons for the absence of a network cable. The most unpleasant of them are physical malfunctions of the equipment - the router, adapter, port, or the patch cord itself. This leads to unnecessary waste of money and time. Everything is much simpler in the case of drivers, since installing or updating them usually does not cause difficulties even for inexperienced users.

1. Reboot the router and check if the cables are connected correctly

When using a cable for connection, check which ports are connected to the network connectors. The internet cable provided by your ISP must be plugged into a separate slot. Usually it is located at some distance from other ports or is indicated by a different color (often blue).

Then reboot the router. This action should be performed regardless of how the connection to the router is performed - by wire or by wireless network(WiFi). To reboot the device, use the “Power” or “On / Off” button on the device itself. Press the button to turn off the router, and after 10-15 seconds, press the button again to turn it on. If there is no separate reset button on the rear panel, unplug the device from the mains by unplugging the power supply. After 30-40 seconds, turn on the device again, and after it boots up, check if the computer can see the router.

2. Run connection diagnostics

Run the panel Windows management on the computer where you are having difficulty connecting. In the Network Control Center, select the menu item marked in the screenshot.

Find the required network adapter, click on it right click and run diagnostics. Windows will try to identify the problem with the connection. If the problem is successfully detected and corrected, the system will inform you that the problem has been fixed. Then reconnect and the computer will see the router.

Important! Network diagnostics can take several minutes. It is recommended that you do not interrupt the troubleshooting process.

3. Use a different connection type

If the previous steps did not help, try connecting to home network another way. If using a cable connection, connect via WiFi and vice versa. This method allows you to localize the error and for its further correction. Among the shortcomings, it can be noted that desktop PCs are rarely equipped with a WiFi adapter, so often this method can only be used on a laptop. For diagnostics, you can use a second computer. This will help determine where the error occurs - on a computer or a router.

4. If using WiFi, check the openness of the network name

The computer may not find home WiFi if the network is configured as hidden. These networks do not broadcast their SSIDs to surrounding wireless devices. You can connect to a hidden network after entering its name and authorization (if encryption is available). Check current WiFi settings in the web interface of the router. Connect to the router with a cable and make sure that the connection is established (the computer can see it). Turn the router over and on its underside look at the address for entering the admin panel, as well as the username and password. Go to the specified address in the browser, enter the data account and find your wireless settings.

Among the settings there will be a checkbox responsible for the visibility of the name of the wireless network. In routers of different manufacturers, it is called differently, for example, "Make network hidden", "Hide SSID", "Hide network name". On TP-Link routers, the desired item is called "Enable SSID Broadcast", and you can find it in the "Wireless Mode -> Wireless Settings" menu. Change this setting, restart your router, and try to reconnect.

5. Make sure the Ethernet port on the computer is working

Connect the internet cable directly to your computer, without using a router. If Internet access appears, then the computer does not see the router due to problems with the router itself. Otherwise, if Internet access does not appear, the error may occur due to problems with the computer's network card. It is recommended to reinstall the network card driver or replace it.

6. Replace the network cable

Failure of a network cable is one of the common reasons why a computer does not see a router. Cable breakage is usually associated with its physical damage which is not always easy to spot. The cord can be damaged by children or pets, it can be crushed by a door or pinched by a baseboard. Try using a different Ethernet cable to connect your computer to the router.

7. Insert the network cable into another port of the router

The failure of one of the LAN ports of the device may be the cause of the problem. Modern routers are equipped with multiple Ethernet ports, usually four. Disconnect the network cable that connects the router to the computer from the used input and connect to the adjacent one. If the computer still does not see the router, try plugging the cable into a different port. If the connection is successful, the corresponding LAN indicator on the router will light up.

Configuring a network connection following all instructions is not a guarantee of uninterrupted Internet access. The reasons why the network stops working are varied and not always obvious. Let's talk about what can cause an Ethernet connection failure and how to fix it.

Why Windows 8 does not work with a network connection via a cable

Hardware reasons:

• damaged or poorly crimped network cable;
• the length of the cable segment between the network nodes is exceeded (more than 100 meters);
• network devices are not correctly wired;
• the network gateway (the device through which the computer connects to the Internet) does not work or is incorrectly configured;
• the cable is not connected to the network card of the computer;
• the network card is faulty or not installed (there is no driver);
• there is a source of electromagnetic interference near a cable, computer or other network device (router, switch).

Reasons related to settings:

• network windows services;
• changed Winsock config (Winsock is Windows structures that control the access of applications to network services);
• connection parameters are incorrect;
• the network adapter turns off to save energy;
• communication is blocked by incorrect settings of security software (firewall or Windows firewall);
• connection to the network (or only to the Internet) is limited by the administrator;
• Windows is infected malware that block access to the Internet.

If the connection is limited for individual applications, for example, only for the browser:

• the application connects to the Internet through a proxy server that is inaccessible;
• the application is blocked by the Windows firewall, firewall, or computer administrator;
• malicious scripts are running in the application context.

We restore the work of the cable network

Fixing equipment problems

If the connection is completely absent, periodically disappears or loses data, start the test with a network cable. Make sure the insulation is intact and not kinked. Check the fastening of the connectors.

If you are setting up the connection for the first time, make sure that the cable is correctly crimped (the conductors are connected to the correct pins of the connector). Below are the crimp diagrams:

1. to connect a computer-device (switch or router);
2. for a computer-to-computer connection.

Checking is relevant only when you crimped the cable yourself. Cables bought in a store already with connectors are rarely inoperative.

Next, check if the network is correctly connected. The connection to the Internet can be direct (the provider's cable is connected to the network card of the computer) or through a gateway (router or other computer). The method of switching and access settings can be found in the technical support of the provider.

When connecting via a router, it is important not to confuse the connection jacks: the provider's cable is inserted into the “INTERNET” or “WAN” jack, and the network cards of computers are connected to the “LAN” jacks.

If there is still no connection, check if the Windows network driver.

• Open the device manager - in Winows 8 it is called from the context menu of the Windows (Start) button.

• Expand the list of Network adapters and check if there is an Ethernet card. If it is defined as unknown device, go to the manufacturer's website using a different Internet connection, download and install the driver.

After that, open the properties of the card via context menu in device manager

and make sure it works fine.

Next, open the "Power Management" tab and uncheck the "Allow shutdown to save energy" item, otherwise the connection will be interrupted.

If the connection is still restricted after installing the network driver, check if there are any interfering devices near the computer, router, or network cable routing: cordless phones, high-power power lines, microwave ovens. Try to move away network hardware from such places.

Checking Windows network settings

Using a network diagnostic tool

The "Troubleshooting" tool allows you to identify and eliminate the causes of various network failures in Winows 8. To start it, click on the "Network" icon in the system tray and select the item of the same name.

If the problem is not automatically corrected, the diagnostic tool will indicate what caused it.

In this case, the cause will have to be looked for and corrected in other ways.

We start the services

The fact that the connection to the Internet is limited or absent is to blame for the failure of Windows network services. To test their work, open the service control application:

• in the context menu of the Windows (Start) button, click the "Run" item;

• enter the command in the "Open" field of the "Run" application services.msc and click OK. The application will launch.

In the service control program, verify that the following components are working:

• DHCP client;
• DNS client;
• Network Save Interface Service;
• Network configuration service.

If these Windows services are not running, the connection will not be created or will be limited to only local area network- without access to the Internet.

To configure autorun of network services together with Windows, open the properties of each of them (via the context menu).

Select Automatic from the Startup Type list. To start the service immediately, click the button of the same name in the "Status" section of the window.

Resetting Winsock and TCP / IP Settings

This operation restores the state of network structures - partitions windows registry 8 where the Winsock configuration is stored. To reset, use the console Windows utility- netshell.exe. Accordingly, it starts through command line(from the administrator).

To reset Winsock and the TCP / IP protocol, follow the two instructions in the console one at a time: netsh winsock reset and netsh int ip reset.

Then restart your computer.

Correcting connection settings errors

To check the connection settings, enter the context menu of the Windows (Start) button and open the "Network Connections" folder.

Right-click to open the context menu of the connection and click the "Status" item.

The next window will display the main connection parameters:

• DHCP (assigns an IP address and other settings to a connection for working in TCP / IP networks) - enabled or not;
• IPv4 address - if it starts with 169.254 (APIPA address range), then the connection is not receiving a valid IP from the DHCP server. Such a connection will always be limited and will not be able to access the Internet.
• Subnet mask - assigned automatically depending on the IP group.
• Default Gateway - The IP of the network device used as the gateway for this connection.
• DNS server - the address of the server that maps domain names Host IP addresses.

To access the settings, click the Properties button in the Status window. In the next window, mark in the list of components "IP version 4" and click "Properties" again.

If the connection does not receive IP and other settings automatically, register them manually. If your computer is directly connected to the Internet (without a gateway), check with your ISP for the settings. When connecting through a gateway (router), one of the addresses of the local range to which the gateway belongs is assigned as IP. For example, if the router address starts with 192.168.1, the connection address must start with the same digits.

The "Default gateway" field contains the IP of the router.

Information on disabling a third-party firewall can be found in its help.

Eliminating other problems

The connection in the corporate network, which is limited by the administrator, makes no sense to try to reconfigure - it will still fail. And if it is limited at home, and this is definitely not the work of your loved ones, it is possible that a virus has started up in the system. For the same reason, access to the network may be closed for individual applications. To solve the problem, scan the system with an antivirus and check again network settings.

If a failure occurs in only one application, check the network access settings in it and the rules for restricting it in Windows Firewall. If the source of the problem is not found, reinstall the program.

Good day!

It happens that you sit after a working day, watch TV - and then, bang ... the doorbell rings: a friend-neighbor comes and very much asks you to figure out where his Internet is gone. Actually, this is how topics for articles are born (when you climb for half an hour through the dusty back streets of an apartment, dealing with a problem that has arisen out of nowhere) ...

In today's article, I want to consider the main reasons due to which the Internet may not work on a computer that is connected via a network cable to the router (I think that many PCs are connected to the Internet this way, and Wi-Fi is used by laptops, smartphones, etc. devices).

And so, let's get down to business ...

Note: you may be interested in an article on how to properly connect and configure a new router -

Why the Internet may not work

In general, in general, an article of such a plan must be divided into two possible cases:

Option # 1: no network connection, no cable connected

1) Check if the router is turned on, if the cable is intact, if it fits snugly in the sockets

Once again, I will say that by connecting the switched on router and the computer with a network cable, there should not be an icon with a red cross! If it is on, then almost certainly some equipment is turned off (or malfunctioning), perhaps there is a problem with the cables.

To begin with, I recommend simply reconnecting the network cable to both the router and the computer's network card. Next, restart your router and PC. Please note that several LEDs should be flashing (on) on a running router

Broken USB cable // This is what happens when equipment is not properly transported

2) Is there a driver for the network card? Try to update it

The second thing I recommend to pay attention to is the network card driver. The fact is that for most network adapters, Windows automatically installs drivers (but they do not work correctly with some cards, and it is advisable to update the driver by downloading it from the official website).

I note that in rare cases (for some network cards) when installing even modern Windows 10 - the OS cannot pick up a driver and the card does not work at all.

To see if there is a driver for the network card, open device Manager ... For this:

In the device manager, open the "Network adapters" tab: all your network adapters should be listed here (note: on which drivers are installed).

Usually, the name of the network card is something like "Realtek PCIe FE Family Controller", "Intel Network Controller" (maybe Ethernet controller, Network controller, etc. derivatives).

If your card is not in the list of network adapters, check the Other Devices tab (it displays devices for which there are no drivers). Please note that on devices for which there are no drivers, yellow exclamation marks are lit.

As help!

The best programs for automatic update drivers -

How to update drivers if the Internet does not work (no network!) -

I also want to note that the device can simply be turned off - then a dark "arrow" will be on in the device manager opposite it (see the screen below). If so: just right-click on such a device and turn it on.

3) Is the network adapter included

The network adapter can also be disabled in the Windows Control Panel (there is a special "Network Connections" tab). To open it:

• press the button combination Win + R ;
• enter the command ncpa.cpl and click OK.

In the opened directory of network connections, see if the network adapter is disabled (example in the screenshot below). Disabled adapter - it is colorless, it has the status "Disabled".

Note that you can have several adapters: Wi-Fi, Ethernet, Bluetooth, etc. Pay attention to Ethernet (or "local area connection").

To enable the adapter, just right-click on it and select the "Enable" option.

At the very least, the icon should become colored, as in the screenshot below.

If you were unable to enable the adapter, please also note that it can be disabled in the BIOS. It would not be superfluous to check it out.

As a reference! How to enter BIOS / UEFI for different versions Software and manufacturers:

4) Try connecting a network cable from your ISP directly to your PC's network card

To save money!

Very cheap components and various cables (adapters, etc. trifle) can be purchased in Chinese online stores. Moreover, the prices are more than democratic:

Option number 2: there is a locale. network, but no internet access

by the way, modern Windows 10 has an excellent diagnostic and troubleshooting wizard built into it. If you have problems accessing the network - try right-clicking on the network icon and selecting "Diagnostics". In many cases, a wizard can help solve the problem.

1) Check the connection status in the router settings. Is there any internet at all

To begin with, what you need to make sure is whether the router itself is connected to the Internet (and how he can distribute it to you if he himself has not connected to the Internet ...).

In order to do this, it is necessary go to the router settings .

You can also try to connect to Wi-Fi (if there is a router - that is, also Wi-Fi?) Network using other devices: phone, laptop, etc. Do they have Internet?

Usually, to open the settings of the router, it is enough to address bar enter the IP-address of the browser: 192.168.0.1, or 192.168.1.1, or 192.168.10.1 (depending on the device model. Use admin as login and password).

To help! Instructions for entering the router settings:

In the settings of the router, just open the "Status" tab - and you can find out if the router is also connected to the Internet. As an example, I gave a couple of screenshots from different models routers (pay attention to the English version of the firmware: Network Status - connected).

Addition!

Perhaps you just lost your Internet settings! Check them, try resetting and reconfiguring them. An example of configuring Internet access on a TP-Link router -

2) Check IP, DNS settings

Need to open network connections : To do this, press the keyboard shortcut Win + R, and enter the command ncpa.cpl.

Then you need to open the properties of the network adapter through which the connection is made (as a rule, its name contains "etherner", "LAN connection", " network connection"and other derivatives) .

Then you need to open properties IP version 4 (as shown in the screenshot below).

In most cases, to connect to the router, you must set the automatic acquisition of the IP address and DNS. Pay attention to the red rectangles in the screenshot below.

By the way, you can register 8.8.8.8 and 8.8.4.4 as DNS (these are DNS from Google, and they are an order of magnitude more stable than DNS from most providers).

3) If the Internet is available when connecting the Internet cable directly to the PC - check if your provider is blocking the connection by MAC address

1. you have set incorrect settings in the router (WAN section) to connect to the Internet. Check them again with the data provided by your Internet provider when you connected;
2. perhaps your ISP blocks devices by MAC address: each network card and router has its own. And for security reasons, some providers deny access to the Internet for unfamiliar devices. In this case, in the router settings, you just need to specify the MAC address of your network card through which you previously (before installing the router) accessed the Internet.

Addition!

MAC address: what it is and where to find it. How to clone the MAC address of an old network card -

4) Try to temporarily disable antivirus utilities

Some utilities that ensure network security (for example, antiviruses, firewalls, etc.) can block incoming / outgoing connections. At the time of testing the network and searching for the reasons for inoperability, I recommend disabling (temporarily!) Such software.

5) Are there any problems on the side of the provider ...

If all of the above did not help, try to check with the provider if he has any problems, for example, a line break.

Wi-Fi without internet access: yellow exclamation mark in the tray is lit -

Although it is on a somewhat different topic, the causes of the problems are the same. Therefore, I recommend that you familiarize yourself.

That's all for now ...

Additions and criticism are welcome ...

All the best!

I myself often encounter this problem at work. There are many computers there, so I've seen all the solutions to this problem in my lifetime. In general, you want to go online, but the system writes an error - that "The network cable is not connected" (with a red cross). Although it is connected, and you are 100% sure of it.

Going online is clearly impossible. Therefore, we will solve the problem ourselves. There is nothing wrong with that, and usually it can all be resolved on the spot. I will tell you about all the methods from the most popular to the rarest. So you just have to read carefully and follow the instructions.

Causes

So what does this mean? In the operating room Windows systems 7, 8, 10 and even XP have the same reasons. The network card cannot receive the network signal. In fact, the symptoms of the problem can lie in several places:

• Faulty wire;
• Malfunction of the plug;
• Breakdown of the port;
• Breakdown of the network card;
• Windows OS problem;
• Viruses and third-party programs have broken the normal function of the drivers
• An emergency at the provider.

First steps

Check if the cable is connected. Strange as it may seem, but it can simply fall out of the nest. This happens if his ear breaks off. Then nothing holds him, and he falls out calm at the slightest breath of wind. I would also advise you to pull out and insert the wire back for clarity.

If your connection does not go directly, but through a router, also pull out the wire from the port on the router and insert it into the same port. Do not confuse, you need to pull out exactly the cable that comes from the computer or laptop. You can insert it into the socket harder, but without fanaticism.

If this does not help, then insert the wire into the router, but into a different LAN socket. Sometimes ports burn out and stop working. This is especially the case, on budget models when connecting a large number of devices via LAN ports.

Just in case, I would also restart the computer and the router itself. Comp I think you already know how to overload. The router just has its own power button, press it, and then turn on the device after a minute. If you are afraid to press on something wrong, just unplug it and insert it back.

If you have a second cable, try connecting it to your router. The cable may have been broken or chewed by pets. There should be a factory wire in the box from under the router - it's short, but it's worth trying it.

On a computer or laptop in a network card, lightly joke the input along with the cable. And look at the connection at the same time. If you see that there is a connection in some position, then this may also indicate a broken integrity of the cable or the plug itself. The contacts in the connector can also be oxidized. In this case, it is best to purchase a new cable.

Driver for a network card

If Ethernet cable is connected and working, what should I do next? The driver from the "network card" may break due to viruses or third-party programs... But it is enough to fix it without using the Internet. To do this, we need to go to the task manager. To do this, simultaneously press the "Windows" and "R" button. After that, you will see a window in which you need to enter the command as in the picture below. Then we press "OK".

Now find the "Network adapters" section with the two crossed computers icon. Open the list and find your network card. Most often the name is the same - "Realtek PCIe GBE Family Controller". Next, you need to delete it by right-clicking and then selecting the desired option.

Then restart your machine. As a rule, after a reboot, the system will automatically install a new, non-broken driver and everything should work.

Setting the duplex speed

It is also enough frequent problem... The network card itself cannot determine the speed and duplex of data transmission in the network. And as a result, you see a red cross and our mistake.

1. And so we go back to the device manager. You can see how to do this in the chapter above.

1. This time we also find the network device and go to the property.

1. Go to the "Advanced" tab. Now on the left in the block you need to find the section "Speed ​​and Duplex", on some versions of Windows this name has the English name "Speed ​​& Duplex".
2. As soon as you select this name, a block will appear on the left where you need to select a value from the list. First, select "Auto-Negotiation". Click "OK" and restart your computer. If automatic speed detection does not work, you will have to select each option separately (1 Gbit, 10, 100 Mbit, etc.) and restart the computer again.

Installing the network driver

It is best to reinstall the driver on your network hardware as it may be broken. If you have a driver disc from motherboard then install "Firewood" from there. You can also download them. Since we do not have the Internet, we have to find a good friend who will let us download the drivers from his computer.

It is best to download hardware software from the official site. It is enough to enter the full name of the motherboard into any search engine. If you do not know the name of your "Motherboard", then the driver can be installed from the "DriverPack Offline Network" package from this site - https://drp.su/ru/foradmin.

Virus removal and system rollback

Check the entire system for viruses. Unfortunately, some system files can be damaged. In such cases, system rollback helps a lot.

1. You will be greeted by the service, click "Next". Click on the checkbox to see all possible restore points. Select the earliest or the date on which this problem did not occur. Click "Next" and then "Finish".
2. We are waiting for the service to fulfill its mission.

Nothing helped

• If your Internet connection goes directly to your computer and laptop, without a router. This is most likely the problem with the provider. In this case, you should call hotline service provider and ask them about the problem.
• If, nevertheless, the connection comes from a router, then take a wire from the provider that comes from the outside and connect it directly to the computer's network card. At the same time, you do not need to configure the Internet, after connecting you should see a yellow triangle in the lower right corner in the place of the connection. In this case, the problem is most likely in the port of the router. As I wrote earlier, try all LAN ports.
• If you have a laptop, then try connecting via WiFi. If it connects, then there is a problem with the network card and software. If not, then there is a malfunction in your Internet center.
• When connecting via aDSL modem, it is better to call those. support so that they call you. In such cases, it is impossible to connect to the network card directly.