Slack does not connect to the Internet? We got the right fix

Radu Tyrsina
by Radu Tyrsina
Founder & Editor-in-Chief
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fix Slack connection issues

Slack connection issues are impossible to avoid when you have a painfully slow or unreliable Internet connection. There are times when Slack is actually down and connection problems originate from their servers, yet you might not like what you’re about to read.

The main reason for your Slack connection issues isn’t related to their infrastructure, but rather resides in your Internet connection.

Having to deal with unsent Slack messages or calls where the audio cuts in and out frequently is no scenario you want to be a part of for too long. You don’t expect getting that from this popular messaging and collaboration app on a daily basis, yet this isn’t the time for losing patience.

In this article, we’re going to explore some of the best ways to fix Slack connection issues.

What can I do if Slack doesn’t connect to the Internet?

1. Check your Internet connection

Slack internet connection issuesThis sounds rather basic, but is the first step to verify if the issue you’re dealing with is specific to the Slack app or not.

  1. Open any other webpage.
  2. If that webpage doesn’t load either, reset your internet connection.
  3. Try loading Slack again.

2. Run the Slack connection test

Slack connection issues test


  1. Sign in to your Slack workspace.
  2. Access to check connections.
  3. Under the WebSockets section, see the results for both WebSocket (Flannel [Primary]) and WebSocket (Flannel [Backup]).
  4. A successful test will reveal the checked circle icon.
  5. A failed test will show instead the warning icon.
  6. In case of any errors, contact your network administrator or Internet service provider.

3. Clear your cache

Slack connection issues clear cache

  1. Open the Slack app.
  2. Click Help in your computer’s menu bar.
  3. Select Troubleshooting.
  4. Click Clear Cache and Restart.

4. Adjust your proxy to keep the connection to Slack open

Slack connection issues sign inAlways remember that proxies and firewalls often mess around with connection between Slack messaging servers and members’ apps. This might be the case if there’s a WebSocket failure in our Slack connection test, or if it becomes impossible to connect from a specific location.

Try this handy tip to solve the problem:

  1. Visit
  2. Here you must whitelist all specified URLs.
  3. Visit that page from each workspace if your environment requires access to multiple workspaces and/or orgs.
  4. Then, verify if your proxy is running SSL decryption.
  5. If it is, it’s time to exempt the following domains: *

5. Collect and send Net Logs

Slack connection issues contactIf none of the above solutions proved to be useful, then collect your Net Logs and send them to Slack. Steps for the desktop app are here detailed:

  1. Once again, open the Slack app.
  2. Click Help in your computer’s menu bar.
  3. Select Troubleshooting.
  4. Select the Restart and Collect Net Logs option.
  5. Once the app has restarted, reproduce the issue.
  6. Quit and restart Slack once more.
  7. It’s time to send Slack an email at with Net Log file or use the contact form.

Note: The name of the file must start with net-log.


We hope this guide managed to help you fix the Slack connection issues caused by the Internet itself, antivirus software or security settings, disruptions with third-party services, or errors with app storage or Slack servers.

Do you know any alternative solutions? Just sound off in the comments below.