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# Comment installer un WiFi professionnel sécurisé en entreprise

Un WiFi professionnel bien configuré est essentiel pour la productivité et la sécurité. Voici comment le mettre en place correctement.

## Sommaire
- Différences WiFi pro vs grand public
- Planifier son installation
- Sécuriser son réseau WiFi
- Maintenance et optimisation

## Différences WiFi pro vs grand public

### Matériel grand public
- Box internet ou routeur basique
- Couverture limitée (1 appareil = 1 zone)
- Pas de gestion centralisée
- Sécurité basique

### Matériel professionnel
- Points d'accès dédiés (Ubiquiti, Aruba, Cisco)
- Couverture étendue et uniforme
- Console d'administration centralisée
- Fonctionnalités avancées (VLAN, portail captif)

## Planifier son installation

### 1. Étude de couverture
Avant d'acheter, analysez vos locaux:
- Superficie à couvrir
- Obstacles (murs, cloisons)
- Zones prioritaires
- Nombre d'utilisateurs simultanés

### 2. Dimensionnement
Règles de base:
- 1 point d'accès pour 150-200m² (bureaux standards)
- Prévoir 20-30 appareils par point d'accès
- Anticiper la croissance

### 3. Câblage
Chaque point d'accès nécessite:
- Un câble Ethernet Cat6 minimum
- Alimentation PoE (Power over Ethernet) recommandée
- Emplacement en hauteur (2,5m idéal)

## Sécuriser son réseau WiFi

### Mesures essentielles
1. **WPA3 ou WPA2-Enterprise**: jamais de WEP ou WPA1
2. **Mot de passe robuste**: 20+ caractères, complexe
3. **SSID séparé pour les invités**: réseau isolé
4. **Mise à jour firmware**: corriger les failles

### Fonctionnalités avancées
- **802.1X/RADIUS**: authentification par identifiants AD
- **VLAN**: isolation des réseaux (bureaux, invités, IoT)
- **Portail captif**: pour les visiteurs
- **IDS/IPS WiFi**: détection d'intrusions

## Maintenance et optimisation

### Surveillance continue
- Taux d'utilisation des points d'accès
- Interférences avec réseaux voisins
- Appareils connectés suspects

### Optimisations
- Ajustement de la puissance d'émission
- Sélection des canaux WiFi
- Mise à jour régulière du firmware

## FAQ - Questions fréquentes

### Quel budget pour un WiFi professionnel?
Comptez 200€ à 500€ par point d'accès, plus l'installation et la configuration.

### Puis-je garder ma box opérateur?
Oui, mais en mode bridge ou derrière un routeur/firewall professionnel.

### Quelle portée pour un point d'accès?
En intérieur: 20-30m avec obstacles, 50m en espace ouvert.

## Services AREZO associés
- [Installation WiFi professionnel](/nos-services/infrastructure-reseau)
- [Audit réseau](/nos-services/infrastructure-reseau)
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