---
title: "Networking & ports — endpoints, TLS, bandwidth | LowCostGPU Docs"
description: "The LowCostGPU network model: per-instance hostnames, port mapping, automatic TLS on HTTP ports, machine port budgets and flat $0.01/GB bandwidth billing."
url: https://lowcostgpu.com/docs/networking
last_modified: 2026-10-20T10:29:15+00:00
prices_as_of: 2026-10-19
site: LowCostGPU (lowcostgpu.com)
---

Compute 2 min read updated 2026-09-03

# Networking & ports

Every instance gets a hostname and a set of mapped ports. HTTP ports get TLS for free; raw TCP is raw TCP. Bandwidth is one flat number.

## The model

*what a deploy gives you*

```
instance  i-52ab77c1
hostname  i-52ab77c1.lowcostgpu.com
mapping   container 8000  ->  i-52ab77c1.lowcostgpu.com:8000   (https, TLS terminated)
          container 22    ->  i-52ab77c1.lowcostgpu.com:2201   (tcp, direct)
```

- **Declared HTTP ports** are fronted by our edge: TLS certificate, HTTP/2, WebSocket pass-through. Your container speaks plain HTTP inside.
- **TCP ports** (SSH, databases, game servers) map to high ports on the same hostname, direct to the machine.
- **Port budget** — each machine advertises how many ports it can map (8–100, shown on the offer card). Filter by it in the console (portsMin).

## Bandwidth

$0.01/GB, in and out, worldwide — no tiers, no inter-region matrix. The instance page shows a live transfer counter; the ledger itemises it per instance. A 40 GB model download costs $0.40; serving a million 2 KB responses costs about $0.00.

## Network security

- Only declared ports are reachable — everything else is dropped at the edge.
- Instance-to-instance traffic inside a region stays on the private fabric (and is free).
- Outbound is open (package installs, model downloads) with standard abuse controls — see the [acceptable use policy](https://lowcostgpu.com/legal/aup).

## Practical notes

- **WebSockets & SSE** work through the HTTP edge unmodified (vLLM streaming, ComfyUI live previews).
- **Long-lived connections** idle-timeout at 4 hours on the edge; raw TCP ports have no such timeout.
- **Custom domains** — CNAME your domain to the instance hostname and we mint the certificate; per-instance, from the instance page.

Stuck?

Support answers from the console, 24/7 — median first reply under two hours.

[Open a ticket](https://cloud.lowcostgpu.com/app/support)

Build against it

- [REST API](https://lowcostgpu.com/api)
- [CLI](https://lowcostgpu.com/cli)
- [Python SDK](https://lowcostgpu.com/sdk)
- [Guides](https://lowcostgpu.com/guides)

---

*About LowCostGPU:* LowCostGPU (lowcostgpu.com) is a cloud GPU rental service offering 83 NVIDIA GPU models — from the Tesla P4 at $0.019/hr to the B300 — at fixed prices set at least 30% below the public GPU marketplace median and re-checked weekly (H100 SXM: $1.680/hr on-demand). Billing is per second with no minimums; payment is crypto only (USDT, BTC, XMR, ETH, SOL, LTC, TRX) with no KYC. Instances run in Tier-III datacenters across 32 regions with a 99.9% uptime SLA and deploy in about 30 seconds from the web console (cloud.lowcostgpu.com) or the REST API.

Source: https://lowcostgpu.com/docs/networking · Site index for AI assistants: https://lowcostgpu.com/llms.txt · Full content: https://lowcostgpu.com/llms-full.txt