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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 nested levels: region, project, and tunnel. Each level is a shared pool of capacity: all tunnels in a region share the region limit, all tunnels in a project share the project limit, and all clients of a tunnel share the tunnel limit. A tunnel never gets more than its own limit, but it can get less when other tunnels in its project or region are busy. When aggregate usage reaches a limit, responses may take longer until usage drops below the limit.

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Traffic

Inbound and outbound traffic share the same limit.

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Client connections

Client connections are new connections from internet users to a tunnel’s public URLs. The limits apply to the number of new connections per second.

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Constraints

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