The problem is in the title. Below the info needed. Any suggestion?root@usbarmory:/etc/dhcp# service isc-dhcp-server startFailed to start isc-dhcp-server.service: Unit isc-dhcp-server.service is masked.root@usbarmory:/etc/dhcp# cat dhcpd.conf ddns-update-style none;option domain-name domain.local;option domain-name-servers 10.0.0.1;default-lease-time 60;max-lease-time 72;authoritative;log-facility local7;option local-proxy-config code 252 = text;subnet 10.0.0.0 netmask 255.255.255.0 {option local-proxy-config http://10.0.0.1/wpad.dat;option routers 10.0.0.1range 10.0.0.3 10.0.0.3;}root@usbarmory:/etc/dhcp# service isc-dhcp-server status isc-dhcp-server.service   Loaded: masked (/dev/null)   Active: inactive (dead)usb0      Link encap:Ethernet  HWaddr 1a:55:89:a2:69:41            inet addr:10.0.0.1  Bcast:10.0.0.255  Mask:255.255.255.0          inet6 addr: fe80::1855:89ff:fea2:6941/64 Scope:Link          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1          RX packets:3078 errors:0 dropped:0 overruns:0 frame:0          TX packets:1815 errors:0 dropped:0 overruns:0 carrier:0          collisions:0 txqueuelen:1000           RX bytes:324336 (316.7 KiB)  TX bytes:316731 (309.3 KiB)
Failed to start isc-dhcp-server.service: Unit isc-dhcp-server.service is mask
dhcp;isc dhcpd