Quand vous voulez vous connecter avec windows10 sur le serveur VPN de la Freebox Delta depuis la mise à jour ça ne marche plus
C'est un problème de masque de réseau
Le seul moyen est de passer par le serveur VPN de la Freebox via l'option OpenVPN
Il vous faudra modifier la configuration d'origine de votre client OpenVPN si vous ne le faites pas vous aurez ce message d'erreur

Wed Dec 25 17:51:41 2019 Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore.
Wed Dec 25 17:51:41 2019 Flag 'def1' added to --redirect-gateway (iservice is in use)
Wed Dec 25 17:51:41 2019 OpenVPN 2.4.8 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [LZ4] [PKCS11] [AEAD] built on Oct 31 2019
Wed Dec 25 17:51:41 2019 Windows version 6.2 (Windows 8 or greater) 64bit
Wed Dec 25 17:51:41 2019 library versions: OpenSSL 1.1.0l  10 Sep 2019, LZO 2.10
Enter Management Password:
Wed Dec 25 17:51:54 2019 TCP/UDP: Preserving recently used remote address: [AF_INET]82.64.161.162:6630
Wed Dec 25 17:51:54 2019 Attempting to establish TCP connection with [AF_INET]82.64.161.162:6630 [nonblock]
Wed Dec 25 17:51:55 2019 TCP connection established with [AF_INET]82.64.161.162:6630
Wed Dec 25 17:51:55 2019 TCP_CLIENT link local: (not bound)
Wed Dec 25 17:51:55 2019 TCP_CLIENT link remote: [AF_INET]82.64.161.162:6630
Wed Dec 25 17:51:55 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Wed Dec 25 17:51:55 2019 [Freebox OpenVPN server c01f58c0d66e333fa29391f126a87abd] Peer Connection Initiated with [AF_INET]82.64.161.162:6630
Wed Dec 25 17:51:57 2019 There is a problem in your selection of --ifconfig endpoints [local=192.168.27.66, remote=212.27.38.253].  The local and remote VPN endpoints must exist within the same 255.255.255.252 subnet.  This is a limitation of --dev tun when used with the TAP-WIN32 driver.  Try 'openvpn --show-valid-subnets' option for more info.
Wed Dec 25 17:51:57 2019 Exiting due to fatal error

Je vous laisse un exemple de ma configuration OpenVPN pour que vous puissiez mettre la même, évidemment il faudra changer l' IP fixe dans remote

client
remote 82.64.161.162 6630
topology subnet
ifconfig 192.168.27.69 255.255.255.224
pull-filter ignore "ifconfig"
route-gateway 192.168.27.64
proto tcp-client
nobind
dev-type tun
tun-ipv6
pull
dev tun0
redirect-gateway
auth-user-pass
auth-retry interact
cipher AES-128-CBC
remote-cert-tls server
verify-x509-name "C=FR, O=Freebox SA, CN=Freebox OpenVPN server c01f58c0d66e333fa29391f126a87abd"
# use tls-remote instead of verify-x509-name for deprecated openssl
# tls-remote "/C=FR/O=Freebox_SA/CN=Freebox_OpenVPN_server_c01f58c0d66e333fa29391f126a87abd"
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