DNS over HTTPS 2025: La Guida Definitiva DoH per Sistemisti e Network Admin

🔧 Implementare DNS over HTTPS in Ambiente Enterprise

Per gestire correttamente il DNS over HTTPS 2025 in azienda, segui questi passi:

1. Configurazione Windows Server 2025 DNS

# PowerShell - Configurare DNS over HTTPS Server
Import-Module DnsServer

# Abilitare DoH sul DNS Server
$dohConfig = @{
    DohServer = "https://cloudflare-dns.com/dns-query"
    Enable = $true
    FallbackToUdp = $true
    Port = 443
}
Set-DnsServerDohSetting @dohConfig

# Verificare configurazione DNS over HTTPS
Get-DnsServerDohSetting | Format-List

2. Policy DNS over HTTPS per Client Aziendali

# Creare GPO per DNS over HTTPS 2025
$gpoPolicy = @{
    Name = "Enterprise-DoH-Policy-2025"
    DoHProfile = "CorporateManaged"
    DoHServer = "https://internal-dns.company.com/dns-query"
    Enforce = $true
    AllowUserOverride = $false
}
New-DnsClientDohPolicy @gpoPolicy

# Applicare a OU specifica
$ouPath = "OU=Workstations,DC=company,DC=com"
Set-GPPrefRegistry -Context Computer -Action Update `
    -Key "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\DNSClient" `
    -ValueName "DoHPolicy" -Value "CorporateManaged" `
    -Type String -Target $ouPath

✅ Checklist Implementazione DoH Enterprise

1. Inventory Application: Identifica tutte le app che usano DNS over HTTPS
2. Internal DoH Resolver: Implementa resolver DNS over HTTPS controllato
3. SSL Inspection: Configura ispezione SSL avanzata su firewall
4. Centralized Logging: Attiva logging di tutte le query DNS over HTTPS
5. SOC Training: Forma il team su nuove tecniche di forensics DoH
6. Incident Response: Testa scenari con DNS over HTTPS crittografato
7. EDR Solution: Implementa Endpoint Detection and Response con visibilità DNS