For Chat to have an optimal connection, consider the following:
*.zopim.iois on the allowed domains list on the firewall. (* is a wildcard and means all subdomains on the
- Chat only uses ports 80 and 443, which should be open on all firewalls and VPNs as they are standard ports.
- Chat relies on Amazon for services. If you are blocking Amazon IPs, it could negatively impact Chat performance.
- Ensure this article has been adhered to in terms of allowed IPs: Configuring your firewall for use with Zendesk.
- Ensure you are not blocking any relevant IPs. For more information, see the article: Using IP Access Restriction to limit access to the Chat dashboard.