##Varios
opkg install luci-app-wol ethtool fdisk cfdisk etherwake kmod-usb-storage-extras kmod-usb-test kmod-usb-uhci kmod-usb-ohci kmod-usb-net kmod-usb-storage tcpdump kmod-fs-ext4 kmod-fs-vfat snmp-utils kmod-nf-nathelper-extra curl blkid e2fsprogs dosfstools block-mount

#DDNS
opkg install ddns-scripts luci-app-ddns ddns-scripts_no-ip_com

##Samba
opkg install samba36-client samba36-server luci-app-samba

##OpenVPN
opkg install openvpn-openssl openvpn-easy-rsa luci-app-openvpn

##Torrent
opkg install transmission-daemon-openssl transmission-web luci-app-transmission

##GRE/VPN
OpenWRT 18.X and >
*Install the packages
opkg update
opkg install kmod-nf-nathelper-extra

*Add a line "net.netfilter.nf_conntrack_helper = 1" to the file (create if dont exist) /etc/sysctl.d/local.conf
or
*Add a line "net.netfilter.nf_conntrack_helper = 1" in /etc/sysctl.d/99-pptp.conf (create this file) and reboot router.
and reboot router