the only line non-stock in /etc/dhcp/dhcpd.conf is:


include "/etc/ltsp/dhcpd.conf";


Here is output of more /etc/ltsp/dhcpd.conf:


#
# Default LTSP dhcpd.conf config file.
#

authoritative;

subnet 192.168.1.0 netmask 255.255.255.0 {
    range 192.168.1.20 192.168.1.250;
    option domain-name "zero-backup-ltsp";
    option domain-name-servers 192.168.1.1;
    option broadcast-address 192.168.1.255;
    option routers 192.168.1.1;
    next-server 192.168.1.1;
#    get-lease-hostnames true;
    option subnet-mask 255.255.255.0;
    option root-path "/opt/ltsp/i386";
    if substring( option vendor-class-identifier, 0, 9 ) = "PXEClient" {
        filename "/ltsp/i386/pxelinux.0";
    } else {
        filename "/ltsp/i386/nbi.img";
    }
}