Package: isc-dhcp-server Version: 4.3.1-6+deb8u2 Hello. Same in stable?
# netstat -tulp|grep dhcpudp 0 0 *:bootps *:* 29110/dhcpd udp 0 0 *:24658 *:* 29110/dhcpd udp6 0 0 [::]:58601 [::]:* 29110/dhcpd
# cat /etc/default/isc-dhcp-server | sed '/^$/d;/^#/d' INTERFACES="" OPTIONS="-4"