I have compiled OpenWrt and install 'dropbear_2017.75-8_arm_cortex-a9_vfpv3.ipk' but it does not allow me to connect as 'Connection failed'. But built-in one is okay. (So, remove the installed package and reinstall 2017.75-5.1 which official one via Luci web console.)
Is there any issue on the custom compiled dropbear? Is there anything missing?