Understand how our platform uses Server-Sent Events (SSE) to push data directly to a
user's browser in real time. Learn why network security tools sometimes flag and block SSE
connections.
To manage connections and handle messaging sessions:
Enhaced Chat User permission set
Enhanced Chat Rep user permission
To reply or transfer conversations:
Access Conversation Entries permission. This permission is available via the
Service Cloud Voice User license or the Agentforce Service Agent User license.
Unlike traditional polling, where a browser constantly asks for updates, SSE keeps a single
open line for instant delivery.
Feature
polling
SSE
Connection
Short-lived, frequent
Long-lived, single connection
Efficiency
Low (high overhead)
High (low overhead)
Latency
Delayed
Instant (real-time)
Why Network Security Blocks SSE
Because SSE connections stay open indefinitely, security tools designed for stop-and-start
web traffic often flag them. Common failure points include:
SSL and TLS inspection: Security engines sometimes buffer the stream to scan for
viruses. Because the stream never ends, the data is held indefinitely and never reaches
the user.
Proxy buffering: Proxies waiting for a full file never see one, which causes the
application to freeze.
Connection timeouts: Firewalls sometimes kill the connection if they deem it idle
during quiet periods.
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