What are the Salesforce IP Addresses & Domains to whitelist?
Required Domains If your company has policies to whitelist only Salesforce domains, please include to the following domains to ensure you receive all content from Salesforce:*.force.com*.salesforce.com*.salesforceliveagent.com (Necessary if you are using Live Agent, Omni or SOS)*.visualforce.com*.documentforce.com*.lightning.com*.salesforce-communities.com (Necessary if you are using Communities or Site.com)*.forceusercontent.com*.forcesslreports.com *.salesforce-hub.com (Necessary for Customer 360)*.trailblazer.me