Network Preflight for a Live 4All Event

Validate DNS, HTTPS, secure WebSockets, latency, loss, bandwidth, proxies, and backup connectivity.

Written By 4ALL.LIVE

Last updated 12 days ago

Prove the venue network can sustain all operator, caption, translation, ASL, viewer, and desktop output paths.

Best for: Network engineers, production IT, and lead operators.

Before you start

Network/security changes require authorization from the venue or organization.

  • Use a non-production reproduction when possible.
  • Record current configuration before changes.
  • Keep an independent confidence monitor and fallback.
  • Inventory operator, interpreter, desktop app, viewer, and receiver locations.
  • Estimate concurrent audio/video/viewer bandwidth plus headroom.
  • Know proxy, SSL inspection, captive portal, VLAN, and firewall ownership.

Step by step

  1. Use wired Ethernet for production sources and validate a physically independent backup.
  2. Confirm system DNS and HTTPS access to the 4All application, help/status, authentication, assets, and approved provider endpoints.
  3. Run 4All Preflight and require the Transcript v3 secure WebSocket hello/ping/pong check to pass.
  4. Test remote-control, display, ASL/LiveKit, translation/STT provider, XPression, and Encoder paths actually used.
  5. Measure sustained upload/download, round-trip time, jitter, and packet loss under realistic venue load.
  6. Verify proxies and TLS inspection preserve long-lived wss:// connections and do not rewrite media traffic.
  7. Document allowed outbound TCP 443 and every local/LAN protocol port for desktop integrations; SRT/RIST normally use agreed UDP ports.
  8. Fail over to backup connectivity in rehearsal and verify recovery order.

What success looks like: Every required production path passes under load with a tested backup and named network owner.

Check your setup

  • Preflight realtime WebSocket passes.
  • No captive portal/idle timeout appears.
  • Bandwidth headroom remains.
  • Receiver-side monitoring survives the planned topology.

Troubleshooting

  • HTTPS works/WSS fails: inspect proxy/firewall idle timeout and upgrade handling.
  • High jitter/loss: use wired path or engineered contribution protocol.
  • Works on hotspot: venue network policy is likely the cause.
  • Local desktop port blocked: create least-scope host/firewall rule.

Security and operational notes

Important: Do not publish a universal allow-list without confirming the current deployment and providers. Validate exact production endpoints with 4All support/IT.