6. Configure SSH Access

Enable secure, limited SSH access for node maintenance and define which ports and package repositories FluxOS should block.

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Configuration Overview

Setting	Description
SSH Access	Grant the operator user limited SSH permissions
Blocked Ports	Specify TCP/UDP ports that FluxOS will refuse to open or use
Blocked Repositories	List package repositories (URLs or hostnames) to block from updates or installs

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SSH Access Options

You can choose one of three modes for SSH access to the built‑in operator account, which has restricted command capabilities:

1. Disabled No SSH access permitted.

2. Use Existing Public Key Paste an ed25519 public key you already generated elsewhere.

3. Generate New Keypair Arcane OS will create a fresh ed25519 keypair and package it for you to download.

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Step-by-Step: Generate a New SSH Keypair

1. Select “Generate New Keypair” Click the Generate New Keypair button in the SSH settings screen.

1. Automatic Download

• A .zip bundle is generated and downloaded automatically.

• The filename matches your hostname (e.g., fluxnode-cumulus-01.zip).

1. Review Bundle Contents

• 🔑 Use operator_key when connecting:

  ssh -i operator_key operator@<node-ip>

1. Store Keys Securely Move the private key into a safe location

2. Finish SSH Setup After downloading and securing your keys, click Finish to apply SSH access and move on.