networkmanager fritz!box

networkmanager.conf

# /etc/NetworkManager/system-connections/'VPN Fritz!Box'
[connection]
id=VPN Fritz!Box
uuid=...
type=vpn
permissions=user:azrdev:;

[vpn]
IKE DH Group=dh2
IPSec ID=azrdev
IPSec gateway=yourdomain.myfritz.net
IPSec secret-flags=1
Local Port=0
NAT Traversal Mode=natt
Perfect Forward Secrecy=server
Vendor=cisco
Xauth password-flags=1
Xauth username=azrdev
service-type=org.freedesktop.NetworkManager.vpnc

[ipv4]
dns-search=
may-fail=false
method=auto
never-default=true

[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=auto