config BR2_PACKAGE_DROPBEAR bool "dropbear" default n help A small SSH 2 server designed for small memory environments. http://matt.ucc.asn.au/dropbear/dropbear.html config BR2_PACKAGE_DROPBEAR_URANDOM bool " Use /dev/urandom (low entropy systems only)?" default n depends on BR2_PACKAGE_DROPBEAR help By default, dropbear uses the much more secure /dev/random. If you are using a system lacking usable entropy sources, this could cause the dropbear ssh daemon to block forever waiting for entropy that will never arrive. By making dropbear use /dev/urandom, you can prevent Dropbear from blocking while waiting on the random device. This could however significantly reduce the security of your ssh connections. Make sure you know what you are doing if you enable this option -- most people should answer N.