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Manage Slack connection issues This article is for IT or network administrators in charge of managing an organization’s network. If you ever need a hand with troubleshooting connection issues, we're here to help .
If you’re not a network admin, check out our guide for troubleshooting Slack’s most common connection issues .
Desktop app
Older versions of the Slack desktop app can result in connection issues and even broken features.
Network settings
Slack must have a persistent connection between our messaging server and members’ apps or browsers. To do so, Slack uses WebSockets over port 443.
Proxies and firewalls can sometimes interrupt this connection. If someone using Slack can’t connect from a specific location, or if there’s a WebSocket failure in our Slack connection test , you’ll need to adjust your proxy or firewall to keep the connection to Slack open. Here’s how:
Visit https://my.slack.com/help/urls and add all specified URLs to your allowlist. If your environment requires access to multiple workspaces and/or orgs, visit that page from each workspace and/or org. Check if your proxy is running SSL decryption. If it is, the proxy must either support WebSockets, or you’ll need to exempt the following domains: wss-primary.slack.com wss-backup.slack.com wss-mobile.slack.com
Network administrators can restrict access to specific Slack workspaces using proxy header injection on their network. The header injection solution has the same network requirements as above.
Certain software, security settings, and firewalls can interfere with Slack connections:
Software
Avira Browser Safety Browser Guard Pokki Smart Panel Spyware and adware Visual Discovery by Superfish
Antivirus or ad-blocking software
Avast McAfee Norton AVG AdBlock Plus
Temporarily turning off your antivirus or ad-blocking software may help you troubleshoot your connection issue. If this fixes the issue, check to make sure that Slack is allowed by that software .
Still having trouble? If you’re unable to resolve your connection issue, get in touch and include a Net Log if possible.
Who can use this feature?
Workspace Owners and Admins
Available on all plans
Thanks so much for your feedback!
If you’d like a member of our support team to respond to you, please send a note to [email protected]
If you’d like a member of our support team to respond to you, please send a note to [email protected]
If you’d like a member of our support team to respond to you, please send a note to [email protected]
