Baza znanja: Synology NAS
L2TP/IPsec VPN from Windows 10 fails with error "remote server is no responding..."
Posted by Silvo Kraševec, Nazadnje spremenjeno s strani Silvo Kraševec on 16 September 2018 10:12 PM


By default, Windows L2TP/IPsec VPN client does't support connections to VPN servers located behind NAT devices. To enable NAT Traversal (NAT-T) support, make following registry change:

  • Open regedit.exe
  • Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent
  • Create a new DWORD 32 type value:
    • Name: AssumeUDPEncapsulationContextOnSendRule
    • Data: 2
      0 - No connection to servers behind NAT (Default).
      1 - Connection where VPN server is behind NAT.
      2 - Connection where VPN server and client are behind NAT.
  • Reboot computer
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