Seedbox Server

Deploys a seedbox with Transmission for maintaining Linux ISO mirrors and OS images.

Quick Start

NFS_SERVER=nas curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/seedbox/install.sh | bash

Components

Transmission: BitTorrent client with WebUI
NFS: Dual mount to NAS for downloads and media storage
Tailscale: Private access to WebUI
Docker: Container runtime
UFW: Firewall (only peer port exposed publicly)
fail2ban + unattended-upgrades: Basic hardening

Environment Variables

Variable	Default	Description
`NFS_SERVER`	required	NAS hostname/IP (Tailscale)
`NFS_SHARE_DOWNLOAD`	`/volume2/Downloads`	NFS export for downloads
`NFS_SHARE_MEDIA`	`/volume2/Multimédia`	NFS export for media/ISOs
`NFS_MOUNT_DOWNLOAD`	`/mnt/download`	Local mount for downloads
`NFS_MOUNT_MEDIA`	`/mnt/media`	Local mount for media
`SEEDBOX_HOSTNAME`	`seedbox`	Server hostname
`PEER_PORT`	`51413`	BitTorrent peer port
`TRANSMISSION_USER`	`admin`	WebUI username
`TRANSMISSION_PASS`	auto-generated	WebUI password
`TZ`	`Europe/Paris`	Timezone

Example with custom settings:

NFS_SERVER=nas \
NFS_SHARE_DOWNLOAD=/volume1/torrents \
NFS_SHARE_MEDIA=/volume1/iso \
TRANSMISSION_USER=damien \
curl -fsSL https://gitea.arnodo.fr/Damien/infra-scripts/raw/branch/main/seedbox/install.sh | bash

Network Access

Service	Public	Tailscale
BitTorrent peers	✅ Port 51413	✅
Transmission WebUI	❌	✅ Port 9091
SSH	❌	✅ Tailscale SSH
NFS (to NAS)	❌	✅

Storage Architecture

NAS (via Tailscale)                    Seedbox LXC (70GB)
┌─────────────────────┐                ┌─────────────────────┐
│ /volume2/Downloads  │◄──── NFS ────►│ /mnt/download       │
│ (incomplete + temp) │                │   └► /downloads     │
├─────────────────────┤                │      (in container) │
│ /volume2/Multimédia │◄──── NFS ────►│ /mnt/media          │
│ (ISOs, VMDK, QCOW)  │                │   └► /media         │
└─────────────────────┘                │      (in container) │
                                       └─────────────────────┘

Transmission Paths

Container Path	Host Path	NAS Path	Purpose
`/downloads`	`/mnt/download`	`/volume2/Downloads`	Incomplete + completed torrents
`/media`	`/mnt/media`	`/volume2/Multimédia`	Final ISOs, VMDK, QCOW images

Recommended Workflow

Torrents download to /downloads (on NAS via NFS)
Once complete, move ISOs to /media/iso/<distro>/
Proxmox mounts the same NAS share for VM templates

What it does

Sets hostname
Installs base packages (vim, fail2ban, unattended-upgrades, nfs-common, at)
Installs and connects Tailscale
Installs Docker
Configures dual NFS mounts to NAS (same as Proxmox)
Deploys Transmission container with both mounts
Configures UFW (peer port public, WebUI via Tailscale only)
Temporarily opens SSH port 22 for 5 minutes (safety net)

SSH Safety Net

During installation, SSH port 22 is temporarily opened for 5 minutes to prevent lockout if you're connected via public IP. After 5 minutes, it will be automatically closed and only Tailscale SSH will work.

# List scheduled jobs
sudo atq

# Cancel the scheduled SSH closure (replace N with job number)
sudo atrm N

# Manually close SSH port 22 if needed
sudo ufw delete allow 22/tcp

Directory Structure

Organize your media by type:

/mnt/media/
├── iso/
│   ├── debian/
│   │   └── debian-12.7.0-amd64-netinst.iso
│   ├── ubuntu/
│   │   └── ubuntu-24.04.1-live-server-amd64.iso
│   ├── rhel/
│   │   └── rocky-9.4-x86_64-minimal.iso
│   └── proxmox/
│       └── proxmox-ve_8.2-1.iso
├── vmdk/
│   └── windows-server-2022.vmdk
└── qcow/
    └── cloud-init-debian-12.qcow2

NAS Configuration (Synology)

Ensure your NAS exports both shares via NFS:

Control Panel → Shared Folder → Edit → NFS Permissions
For each share (Downloads and Multimédia), add rule:
- Hostname/IP: * or Tailscale IP of seedbox (e.g., 100.x.x.x)
- Privilege: Read/Write
- Squash: No mapping
- Security: sys
- Enable NFSv4.1: ✅

Post-install

# Check NFS mounts
df -h /mnt/download /mnt/media

# View Transmission logs
cd ~/transmission && docker compose logs -f

# Restart Transmission
cd ~/transmission && docker compose restart

# Move completed ISO to final location
mv /mnt/download/debian-12.iso /mnt/media/iso/debian/