pib-512_arm1176jzf-s_vfp OpenWrt 18.06.8 ssrp_trojan_usb_4g_E5576-855 opkg update opkg remove dnsmasq && opkg install dnsmasq-full opkg install luci-i18n-base-zh-cn luci-i18n-firewall-zh-cn openssh-sftp-server kmod-usb-net-cdc-ether usb-modeswitch