SOLVED! IPv4 Connectivity “No Network Access”

Issues like IPv4 Connectivity “no network access” tend to be the cause of network error and the network troubleshooter should bring things back to normal. Other solutions include updating drivers, checking DNS and IP addresses, resetting Winsock and changing to HT mode. Take a look at this article and restore Internet connection to your PC.

What Might Have Gone Wrong 

Network Adapter Drivers

All in all, network adapter driver acts as a communication medium between your network connections and your computer. For the connection to remain up and running, you must ensure that the driver is undamaged, not corrupted and up-to-date. Thus, once it comes to IPv4 connectivity “no network access”, you should give network adapter driver some thought. 

Addresses

On your PC, you can manually change the IP address and DNS server address. However, if you fail to properly configure the addresses,  “no network access” is one of the consequences.

Winsock 

Winsock, short for Windows Sockets, is a programming interface that interprets how Windows network application software should access network services. Needless to say, if Winsock ran into problems, access to the Internet would go haywire from time to time. 

How To Deal With The Issue

Network Troubleshooter

Regarding  IPv4 connectivity “no network access”, it’s a good idea to make use of Network Troubleshooter. As the name suggests,  Network Troubleshooter excels at dealing with issues that involve network. 

• Step 1: Press the Windows key, type control and hit Enter to open Control Panel.
• Step 2: Select Troubleshooting then choose Network and Internet.
• Step 3: Click Internet connection and pick Next to start running the troubleshooter.
• Step 4: Assuming that the troubleshooter manages to identify the root cause, click Apply this fix and let Windows handle the rest.
• Step 5: Lastly, close everything,  go to network connection status and determine whether the issue persists. 

Update Drivers

If Internet protocols like IPv4 act up out of the blue, you should ensure that your network driver is up to date.

• Step 1: Press Windows + R to open Run 
• Step 2: Type devmgmt.msc then hit Enter to open Device Manager.
• Step 3: Expand Network adapters and right-click on your device driver.
• Step 4: Select Properties then go to the Driver tab.
• Step 5: Click Update Driver then follow the onscreen instructions to update your driver.
• Step 6: Restart your computer then connect your computer to the internet.

Note: If you are not sure which network adapter to update, you will have to right-click each of the drivers, pick uninstall devices and restart your PC. Windows will reinstall the necessary network adapters when the screen comes back on.

Think About DNS And IP Address

You suspect the DNS server address and IP address to be behind the situation? Then it won’t hurt to change the way your PC obtains the addresses. 

• Step 1: Press Windows + R to open Run.
• Step 2: Type control and hit Enter to open Control Panel.
• Step 3: Select Network and internet then choose Network Connections.
• Step 4: Open your type of connection e.g. Ethernet or Wi-Fi and hit Properties.
• Step 5: Click Internet Protocol Version 4 (TCP/IPv4) then pick Properties.
• Step 6: Choose both Obtain an IP address automatically and Obtain DNS server address automatically then select OK to save changes.
• Step 7: Hit OK to close the properties window then let your PC automatically obtain the addresses

Alternatively:

• Step 1: Press Windows + R to open Run.
• Step 2: Type cmd then hit Enter to open Command Prompt.
• Step 3: Give up the current address by typing the following command ipconfig /release then press Enter.
• Step 4: Renew the address by typing the following command ipconfig /renew then press Enter.
• Step 5: Once done, type exit then hit enter to close Command Prompt. At that point, you only need to restart your computer and check up on your network connection status.

Reset Winsock

To reset Winsock configurations to default, you need to go through the following steps:

• Step 1: Press Windows + X to open Quick Link Menu.
• Step 2:Hit Command Prompt (Admin) to open Command Prompt with administrative privileges.
• Step 3: Reset Winsock entries, IPv4 TCP/IP, and IPv6 TCP/IP stack to their defaults by typing the following commands. Remember to press Enter after each of the commands.
  • netsh winsock reset catalog
  • netsh int ipv4 reset reset.log
  • netsh int ipv6 reset reset.log
• Step 4: Restart your computer.

Take HT Mode Into Account

For your information, HT mode allows you to specify which modes to support High Throughput and Very High Throughput. If you see  “no network access” next to IPv4 connectivity time and again, 

• Step 1: Press the Windows key + R to open Run.
• Step 2: Type ncpa.cpl then hit Enter to open the Network Connections window.
• Step 3: Right-click on your connection then select Properties.
• Step 4: Click Configure and on the next window, go to the Advanced tab.
• Step 5: Select HT mode then click OK to save changes.
• Step 6: Close all open windows, restart your computer then check your network connection status.

What Is The Difference Between IPv4 And IPv6?

In terms of address size, IPv4 is a 32-bit address whereas IPv6 is a 128-bit address. Also, IPv4 supports Manual and DHCP address configuration while IPv6 supports Auto and renumbering address configuration 

What Are The Categories Of IPv4?

IP addresses consist of four sections separated by three periods. The addresses are divided into three categories: Class A, Class B, and Class C. Class A addresses use the first byte to specify the network prefix, leaving 3 bytes to define individual host numbers. Class B addresses use the first 2 bytes to specify the network prefix. Class C addresses use the first 3 bytes to specify the network prefix, leaving only the last byte to identify hosts.

Suggestions

• For faster and stable connections, stick to wired connections.
• Position your Wi-Fi router in the center of your house.
• Use a wireless repeater to strengthen your wireless signals if necessary.
• Need to quickly connect to your Wi-Fi connection? Check the box beside Connect automatically.