Common Slack Message Issues

Workaround: Import the Web Sockets Ruleset

To import the rule set, do the following:

1. Log on to SWG.
2. Select Policy, Rule Sets, Common Rules.
3. Click Add and select Rule Set from Library.
4. In the Overview section, expand Common Rules.
5. Select WebSocket Handling and click OK.
6. Place this rule set into your Common Rules set.

Restrict the Policy to allow Slack messages

1. Edit the Criteria for the top WebSocket handling rule.
2. Select the criteria as URL.Host  matches in the list
3. Create a URL.Host list named as Slack Connections with the following URLs:
   
   wss-primary.slack.com
wss-backup.slack.com
wss-mobile.slack.com