Supplemental Slack info for you and your team.Tips and tools for beginners and experts alike.Get familiar with Slack Enterprise Grid for large organizations.If you're curious about what's new in Slack — and what's changed — you're in the right place.Develop your skills and prepare to become Slack Certified!Launching a new team or joining one for the first time?
Our easy-to-read guides help your team work better, together, from day one.Ready to level up? Browse our time-saving tricks and practical tips for
making Slack work for you.All kinds of teams thrive with Slack — take a look at our department-specific guides.
More coming soon!Learn how Slack works, from top to bottom!Want to learn more about setting up your team? Look no further!Welcome to Slack! We're so glad you're here. Let's get started!Adjust your profile and preferences to make Slack work just for you!Simplify your daily work with apps and tools.Tips and tools for beginners and experts alike.
Slack is experiencing some connectivity issues — please stand by. Check
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:
Whitelist the following wildcards: *.slack.com *.slack-msgs.com *.slack-files.com *.slack-imgs.com *.slack-edge.com *.slack-core.com *.slack-redir.net edgeapi.slack.comwss-primary.slack.comwss-backup.slack.comwss-mobile.slack.com
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: *.slack-msgs.com wss-primary.slack.com wss-backup.slack.com wss-mobile.slack.com
Action required: By March 15, 2019, IT and network administrators may need to make updates to their network connections. Run a connection test to check for errors, then whitelist the four additional subdomains in bold above if needed.
Certain software, security settings, and firewalls can interfere with Slack connections:
Avira Browser Safety
Spyware and adware
Visual Discovery by Superfish
Antivirus or ad-blocking software
Temporarily turning off your antivirus or ad-blocking software will let you troubleshoot your connection issue. If this fixes your issue, add *.slack-msgs.com wss-primary.slack.com wss-backup.slack.com wss-mobile.slack.com to your software’s exemption list before re-enabling.
Still having trouble? If you’re unable to resolve your connection issue, get in touch and include a Net Log if possible.