Fix Diablo 4 Network Disconnect Issue

Diablo 4 Network Disconnect – Diablo 4 is finally here, and other than some minor hiccups, the launch of the game has been quite smooth so far. The game runs well. Some of the performance issues that exist in the game at the moment could easily be fixed. What players are not been able to take care of are the Network or Connection related problems. A lot of people are witnessing lag in the game, and by lag, I mean connection-based lag and not fps-based lag. Not only that, a lot of players are being straight-up kicked from the game after the game shows them an error that says:


The game connection has been lost: your client has been disconnected from the server.

Screenshot showing Diablo 4 Network Disconnect Issue - Screenshot by Frondtech

Now, normally when this happens, it has nothing to do with players or their internet connections. The “Network Disconnect” error normally pops up when there are some issues in the servers. To make sure that the problem is from Blizzard’s side and not yours, Go to the Blizzard Support Twitter and see if there is a tweet addressing any server issue or not. It looks something like this:

Diablo 4 Twitter

If you don’t find anything, go to the official page of Diablo 4 Support and check if there is any message on top related to server issues or not. Once you have made sure that the servers are fine, it is time to get to fixing:

How to Fix the Diablo 4 Network Disconnect Issue

Here are the steps I recommend, to fix the Network Disconnect Error in Diablo 4:

Just restart Diablo 4 and the app

I know this sounds silly, but a lot of times, all these issues could easily be fixed with a game restart. There are plenty of bugs in Diablo 4, and they can cause the game to lose connection to the internet. In that case, just a simple restart can help.

Do a quick speed test of your internet connection

The first thing you should do is quickly head over to Speedtest, and do a quick speed test of your connection to make sure that you are getting the speed you are supposed to.

Reset your network device

There is a chance that your network device might be getting flooded with data. In that case, you might have to reset it. This is also called Power Cycling. Power cycling your modem and router allows them to reset and re-establish a connection to your ISP. Here is what you need to do:

  1. Turn off all your devices and computers connected to the modem/router.
  2. Shut down and unplug your modem, and also the router, if you’re using one.
  3. Keep it like that for 2 minutes.
  4. Start your router and then your PC.

This is something that I personally do whenever I get connection issues in Overwatch, as this thing is quite common there.

Plug-in your PC or Laptop directly to your modem

Lag is actually a very common problem with wireless connections. I use both wired and wireless, myself. And, there is a night and day difference in performance.

If you’re experiencing high latency in DIablo 4 while using your low-speed or wireless internet connection, try plugging your computer directly into your modem. Don’t forget to close other programs that access the internet, such as other games or download programs.

Are you sure you are not using a VPN?

I have seen a lot of people who leave their VPN on almost all the time. The amount of data you can send and receive is not unlimited with all VPNs. Only the premium ones offer such services.

Most of the VPNs, that are in the market, at the moment, free or paid, limit data transfer. So try to keep them disabled, while you are playing always-online games.

Flush your DNS

Flushing DNS is a common method that is used for addressing network issues. Here is what you need to do:

  1. Make sure Diablo 4 is not running, press the Windows Key on your keyboard, and type CMD
  2. Right-click Command Prompt
  3. Select Run as administrator
  4. Type ipconfig /release in the command prompt and press Enter
  5. Wait a few seconds for a reply that the IP address has been released
  6. Type ipconfig /renew in the command prompt and press Enter
  7. Wait a few seconds for a reply that the IP address has been re-established.
  8. Finally, type ipconfig /flushdns in the command prompt and press Enter
  9. Close the command prompt and attempt to make a connection

Close Applications that are eating your bandwidth and causing Lag

We often don’t realize it, but there are a lot of background apps that we leave unattended for months. And all they do is, keep running and keep eating bandwidth. You need to find such applications and close them. Here is how to do it:

  1. Restart your PC first.
  2. Once you are back, right-click on your Windows taskbar, and select Task Manager, to open it.
  3. If your Task Manager is not showing any details.
  4. Click on More Details.
  5. This will bring up the detailed version of the Task Manager.
  6. Click on the Startup tab.
    How to disable applications that eat a lot of bandwidth
  7. Right-click on each item and select Disable.
  8. Now, go ahead and restart your PC.
  9. Try running Diablo 4 again.
  10. If you notice that the issue has been resolved, enable the startup application one at a time to determine which one is causing the problem.
  11. You will need to restart between each application you enable.

Here are some applications that usually eat a lot of bandwidth:

  • Xbox PC app
  • T0rrent apps
  • Logitech Hub
  • Razer Synapse
  • Cortana
  • Launchers like Epic, Steam, etc.,
  • Lenovo Vantage
  • AV software – they are constantly sending data
  • Skype
  • Spotify

Firewalls and Anti-virus software can cause connection issues too

The Firewall systems that come packaged inside Anti-virus software, check and filter your connection almost 24×7. They don’t allow just any application to send and receive data freely. Disabling or temporarily uninstalling your security software can help resolve these issues.

To check whether the Antivirus or Firewall is blocking you from accessing the online features of the game.

  1. Open your Windows settings
  2. Select Update & Security
  3. Now, select Windows Security, from the left bar
  4. Click on Firewall & Network Protection
  5. Click on “Allow an app through firewall”
  6. Select “Change Settings”
  7. Find Diablo 4, from the list
  8. Check both the small boxes and click on OK

After trying all these methods, if you are still getting the “Network Disconnect” error in Diablo 4, you can contact Blizzard Support and send them a ticket. I will be on my toes for the next few days, looking for guaranteed fixes. And as soon as I find something, I will immediately update this article. If you want, you can bookmark this page.

If you think this guide has helped you, let us know in the comment section below. And for more Diablo 4 guides, keep an eye on Frondtech. We will be covering every single technical issue and bug of the game. Good luck!

That’s all, folks!