/lib/systemd/system/connman.service

[Unit]
Description=Connection service
DefaultDependencies=false
Conflicts=shutdown.target
RequiresMountsFor=/var/lib/connman
After=dbus.service network-pre.target systemd-sysusers.service
Before=network.target multi-user.target shutdown.target
Wants=network.target

[Service]
Type=dbus
BusName=net.connman
Restart=on-failure
ExecStart=/usr/sbin/connmand -n --nodnsproxy
StandardOutput=null
CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE CAP_NET_RAW CAP_SYS_TIME CAP_SYS_MODULE
ProtectHome=true
ProtectSystem=full