> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nebius.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Nebius Tunnels limits and constraints

Nebius Tunnels enforces platform-wide limits on traffic and client connections. These limits protect shared infrastructure and can't be changed in the web console.

Limits apply at three levels. All tunnels in a [region](/overview/regions) share the region limit, all tunnels in a project share the project limit, and all clients of a tunnel share the tunnel limit.

When aggregate usage reaches a limit, responses may take longer until usage drops below the limit.

### Traffic

| Level   | Limit    |
| ------- | -------- |
| Region  | 2 Gbps   |
| Project | 400 Mbps |
| Tunnel  | 80 Mbps  |

### Client connections

*Client connections* are concurrent connections from internet users to a tunnel's public URLs.

| Level   | Limit |
| ------- | ----- |
| Region  | 2000  |
| Project | 1500  |
| Tunnel  | 300   |

## Constraints

Certain Nebius Tunnels settings have technical constraints that can't be changed directly.

| Constraint name           | Value           |
| ------------------------- | --------------- |
| Agent connection protocol | HTTP/2 over TLS |
| Supported service types   | HTTP and TCP    |