Multiple concurrent Isaac Sim (5.1.0) WebRTC streams on a single workstation: only one user can access UI; others fail — how to isolate per-container streams?

[shreyassule7738]

We are running Isaac Sim 5.1.0 on a single remote workstation using the official Docker image (following the Container Deployment guide). Users connect through the Isaac Sim WebRTC Streaming Client.
Our workflow requires 2–3 users to work simultaneously. Each user has:

Their own OS-level account on the workstation
Their own Docker container created from the same Isaac Sim 5.1.0 image
A unique container name to avoid conflicts

When only one container is running, WebRTC streaming works normally.
However, when multiple users start their instance, only one user can access the UI via WebRTC. The other containers fail to establish the WebRTC connection.
We discovered that Isaac Sim WebRTC uses fixed internal ports, so even if users map different external host ports, the containers still conflict because all instances bind to the same internal WebRTC signaling and data ports.
We understand that running multiple Isaac Sim instances on the same workstation is not the recommended setup. However, our use case is very lightweight, and we currently have no alternative hardware.

Issue Summary
Multiple Isaac Sim Docker containers start successfully
Only one user can connect via WebRTC
Additional users see no UI
Likely cause: WebRTC signaling and data channels use fixed ports, causing conflicts when multiple containers share the same host IP
Exposing different host ports does not help because Isaac Sim binds to fixed internal ports

Steps to Reproduce
User A starts Isaac Sim container → WebRTC works
User B starts another container from same image → WebRTC connection fails
Stopping container A allows container B to stream normally
Any two containers running at the same time = only one can stream

Request
We would appreciate clarification on the following:

1. Is it possible to run multiple concurrent Isaac Sim WebRTC streams on the same workstation (i.e., multiple containers running simultaneously)?
2. If multiple concurrent streams are supported, what is the correct and supported configuration to achieve this?
3. Can the WebRTC signaling, data channel, or HTTP ports be overridden via arguments or environment variables?
4. Are there recommended steps to isolate each container’s WebRTC session so that each user can reliably access the UI of their own Isaac Sim container?

[sheikh-nv]

Hi. Custom ports is not available in Isaac Sim 5.10 but is available in 6.0.
Take a look at this discussion.
#413

With the new WebRTC extension. There can be only one primary user stream to control the UI but there can be multiple non-interactive streams as view-only. Does this use case works for you?

[vick-yu]

@shreyassule7738 Could you also help us by answering a brief WebRTC usage survey?

This will help us better understand and improve the WebRTC experience:

1. Primary goal of using WebRTC

• Remote UI / VDI‑like access to Isaac Sim
• Debugging / visualization only
• Teaching / demo / presentation
• Training / RL monitoring (Isaac Lab)
• Remote development (no local GPU)
• Other (please explain):

2. Where is Isaac Sim running?

• Local workstation
• On‑prem server (different network)
• Cloud VM (AWS / Azure / GCP / other)
• University / shared cluster
• Other (please explain):

3. How often do you use WebRTC?

• One‑time setup / occasional
• Daily development
• Long‑running sessions (hours+)
• Other (please explain):

4. What would you use instead if WebRTC worked perfectly?

• Remote desktop (VDI / RDP / NoMachine)
• Omniverse Streaming Client
• SSH + logs only
• Local GUI install
• Other (please explain):

5. What is most important to you?

• Low latency
• Stability / no disconnections
• Works across the Internet
• Easy setup
• Multiple displays / large scenes
• Other (please explain):