isc-dhcp-server Компьютеры, не получающие IP-адреса

Первоначально я запускал isc-dhcp-server на Raspberry Pi , пока не удалил / lib случайно . Мне удалось получить /etc/dhcp/dhcpd.conf. Я установил isc-dhcp-server с sudo apt-get install isc-dhcp-server. Теперь, если я посмотрю на syslog, я увижу DHCPOFFER и DHCPDISCOVER в журнале, но компьютер никогда не получит IP.

Например, я вижу около десятка различных вариантов этого:

Mar 23 19:47:00 server dhcpd: No hostname for 192.168.0.118
Mar 23 19:47:00 server dhcpd: DHCPDISCOVER from 00:00:00:00:00:00 (client) via p1p1
Mar 23 19:47:00 server dhcpd: DHCPOFFER on 192.168.0.118 to 00:00:00:00:00:00 (box) via p1p1

И иногда я вижу это:

DHCPACK on 192.168.0.144 to 00:00:00:00:00:00 via p1p1

00: 00: 00: 00: 00: 00 не фактический MAC-адрес.

/etc/dhcp/dhcpd.conf это:

authoritative;
ddns-update-style none;
option local-proxy-config code 252 = text;
option domain-name "net.MYCOOLNETWORK";
option server.ddns-domainname = config-option domain-name;

subnet 192.168.0.0 netmask 255.255.255.0 {
authoritative;
option routers 192.168.0.1;
option broadcast-address 192.168.0.255;
option subnet-mask 255.255.255.0;
option domain-name-servers 192.168.0.4;
option local-proxy-config "http://192.168.0.4:80/wpad.dat";
option domain-name "net.strodl";
option server.ddns-domainname = config-option domain-name;
#   option ddns-domain-name "net.strodl";
option domain-search "net.strodl";
range dynamic-bootp 192.168.0.3 192.168.0.254;
default-lease-time 21600;
max-lease-time 43200;
get-lease-hostnames true;
use-host-decl-names on;

filename "pxelinux.0";

allow booting;
#   allow bootp;

host wpad {
    hardware ethernet D0:50:99:51:3D:2C;
    fixed-address 192.168.0.4;
#       host-name wpad;
}

host hpmain {
    hardware ethernet 00:11:2F:14:65:E9;
    fixed-address 192.168.0.99;
}

host routere900 {
    hardware ethernet 20:AA:4B:D4:91:91;
    fixed-address 192.168.0.7;
}

host mainlinksys {
    hardware ethernet 00:18:F8:17:C3:AB;
    fixed-address 192.168.0.128;
}

host dellmain {
    hardware ethernet 6C:33:A9:8F:4D:3E;
    fixed-address 192.168.0.118;
}

host imac1 {
    option host-name "imac1";
    # change your hardware address here
    hardware ethernet 00:0a:27:b3:57:08;
    # change your address here if needed
    fixed-address 192.168.0.70;
}

host canonmx430 {
    hardware ethernet 2C:9E:FC:C0:F7:45;
    fixed-address 192.168.0.246;
}

host magicjack {
    hardware ethernet 6c:33:a9:8f:4d:3e;
    fixed-address 192.168.0.87;
}

host wrt54g {
    hardware ethernet 00:90:4C:91:00:02;
    fixed-address 192.168.0.90;
}

host piplexconnect {
    hardware ethernet 00:21:2f:39:61:50;
    fixed-address 192.168.0.16;
}

group {
    next-server 192.168.0.2;
    host tftpclient {
        filename "pxelinux.0";
    }
}

}

   host piplexconnect {
        hardware ethernet 00:21:2f:39:61:50;
        fixed-address 192.168.0.16;
   }

    group {
        next-server 192.168.0.2;
        host tftpclient {
            filename "pxelinux.0";
        }
    }

}