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Virtualmin/Proxmox/Starman Coexistence

Potential Conflict Areas

Component	Virtualmin Default	Manual Setup Risk
Web Services	Apache + Nginx proxy	Port collision if Starman uses 80/443 directly
Firewall	Webmin Firewall Module	UFW rules may override Virtualmin's config
SSL Certificates	Let's Encrypt via Webmin	Manual certs might break auto-renewal
User Accounts	Virtualmin-managed users	Manual system users won't appear in Virtualmin

Safe Configuration Zones

Starman as Backend Server

# Use high ports outside Virtualmin's range
--listen :5000  # Safe (Virtualmin uses 80/443/21/etc)

Proxmox Network Isolation

qm set <VMID> -net0 virtio,bridge=vmbr2  # Separate from Virtualmin's vmbr0

Virtualmin Proxy Integration

# In Virtualmin: Services → Configure Website → Proxy to URL
http://localhost:5000/  # Reverse proxy setup

Integration Best Practices

File System Layout

/home/
├── virtualmin/  # Virtualmin-managed
│   └── domains/
└── starman/     # Manual installations
    └── apps/

Service User Isolation

# Virtualmin users: web_*
# Manual users: starman_*
sudo useradd --system --shell /usr/sbin/nologin starman_svc

Backup Coordination

Virtualmin Backup:
```
Exclude /home/starman/
```
Proxmox Backup:
```
Include /home/starman/ in VM backups
```

Conflict Recovery Steps

Port Conflict Resolution

sudo ss -tulpn | grep '80\|443'
sudo systemctl stop starman  # If conflicting

Firewall Reset

sudo ufw disable
sudo webmin-firewall --reset
sudo ufw enable

User Permission Repair

sudo virtualmin fix-permissions --all-domains
sudo chown -R starman_svc:starman_svc /home/starman

Emergency Rollback Procedure

# Restore Virtualmin core services
sudo virtualmin restore-backup --all-features --force

# Preserve manual configurations
mv /home/starman /home/starman.bak
# Restore from Proxmox backup