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I'm following this tutorial to install Linux in a system that does not have CD reader nor USB boot capabilities. Eventually, I reached the point where I had to install isc-dhcp-server and I did, sort of.

Apt tells me that there's one partially installed package. I run sudo apt-get install -f and I get the following:

Job for isc-dhcp-server.service failed. See 'systemctl status isc-dhcp server.service' and 'journalctl -xn' for details.
invoke-rc.d: initscript isc-dhcp-server, action "start" failed.
dpkg: error processing package isc-dhcp-server (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
isc-dhcp-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

If I do /etc/init.d/isc-dhcp-server start the prompt consists of the first two lines of the same message.

Output from sudo systemctl status isc-dhcp-server:

● isc-dhcp-server.service - LSB: DHCP server
   Loaded: loaded (/etc/init.d/isc-dhcp-server)
   Active: failed (Result: exit-code) since Fri 2014-12-12 13:19:25 CST; 2min 43s ago
  Process: 1677 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=1/FAILURE)

Dec 12 13:19:23 semplice dhcpd[1684]: you want, please write a subnet declaration
Dec 12 13:19:23 semplice dhcpd[1684]: in your dhcpd.conf file for the network segment
Dec 12 13:19:23 semplice dhcpd[1684]: to which interface eth0 is attached. **
Dec 12 13:19:23 semplice dhcpd[1684]: 
Dec 12 13:19:23 semplice dhcpd[1684]: 
Dec 12 13:19:25 semplice isc-dhcp-server[1677]: Starting ISC DHCP server: dhcpdcheck syslog for diagnostics. ... failed!
Dec 12 13:19:25 semplice isc-dhcp-server[1677]: failed!
Dec 12 13:19:25 semplice systemd[1]: isc-dhcp-server.service: control process exited, code=exited status=1
Dec 12 13:19:25 semplice systemd[1]: Failed to start LSB: DHCP server.
Dec 12 13:19:25 semplice systemd[1]: Unit isc-dhcp-server.service entered failed state.

Output from sudo journalctl -xn:

-- Logs begin at Fri 2014-12-12 12:57:16 CST, end at Fri 2014-12-12 13:32:01 CST. --
Dec 12 13:31:58 semplice NetworkManager[505]: <info>   lease time 86400
Dec 12 13:31:58 semplice NetworkManager[505]: <info>   nameserver '192.168.1.254'
Dec 12 13:31:58 semplice NetworkManager[505]: <info>   domain name 'lan'
Dec 12 13:31:58 semplice dbus[518]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.ser
Dec 12 13:31:58 semplice dbus[518]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Dec 12 13:31:58 semplice nm-dispatcher[2194]: Dispatching action 'dhcp4-change' for wlan0
Dec 12 13:31:58 semplice dhclient[616]: bound to 192.168.1.65 -- renewal in 45 seconds.
Dec 12 13:31:58 semplice NetworkManager[505]: bound to 192.168.1.65 -- renewal in 45 seconds.
Dec 12 13:32:01 semplice sudo[2197]: alejandro : TTY=pts/0 ; PWD=/home/alejandro ; USER=root ; COMMAND=/bin/journalctl -xn
Dec 12 13:32:01 semplice sudo[2197]: pam_unix(sudo:session): session opened for user root by alejandro(uid=0)

This is my /etc/dhcp/dhcpd.config file wich is just a copy of the example in the tutorial mentioned above.

Output from /var/log/syslog read immediately after running apt-get install -f

Dec 12 16:42:40 localhost dhclient: DHCPREQUEST on wlan0 to 192.168.1.254 port 67
Dec 12 16:42:40 localhost NetworkManager[505]: DHCPREQUEST on wlan0 to 192.168.1.254 port 67
Dec 12 16:42:40 localhost dhclient: DHCPACK from 192.168.1.254
Dec 12 16:42:40 localhost NetworkManager[505]: DHCPACK from 192.168.1.254
Dec 12 16:42:40 localhost NetworkManager[505]: <info> (wlan0): DHCPv4 state changed renew -> renew
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   address 192.168.1.65
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   plen 24 (255.255.255.0)
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   gateway 192.168.1.254
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   server identifier 192.168.1.254
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   lease time 86400
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   nameserver '192.168.1.254'
Dec 12 16:42:40 localhost NetworkManager[505]: <info>   domain name 'lan'
Dec 12 16:42:40 localhost dbus[518]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Dec 12 16:42:40 localhost dbus[518]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Dec 12 16:42:40 localhost nm-dispatcher: Dispatching action 'dhcp4-change' for wlan0
Dec 12 16:42:41 localhost dhclient: bound to 192.168.1.65 -- renewal in 52 seconds.
Dec 12 16:42:41 localhost NetworkManager[505]: bound to 192.168.1.65 -- renewal in 52 seconds.
Dec 12 16:43:32 localhost dhclient: DHCPREQUEST on wlan0 to 192.168.1.254 port 67
Dec 12 16:43:32 localhost NetworkManager[505]: DHCPREQUEST on wlan0 to 192.168.1.254 port 67
Dec 12 16:43:32 localhost dhclient: DHCPACK from 192.168.1.254
Dec 12 16:43:32 localhost NetworkManager[505]: DHCPACK from 192.168.1.254
Dec 12 16:43:32 localhost NetworkManager[505]: <info> (wlan0): DHCPv4 state changed renew -> renew
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   address 192.168.1.65
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   plen 24 (255.255.255.0)
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   gateway 192.168.1.254
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   server identifier 192.168.1.254
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   lease time 86400
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   nameserver '192.168.1.254'
Dec 12 16:43:32 localhost NetworkManager[505]: <info>   domain name 'lan'
Dec 12 16:43:32 localhost dbus[518]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Dec 12 16:43:32 localhost dbus[518]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Dec 12 16:43:32 localhost nm-dispatcher: Dispatching action 'dhcp4-change' for wlan0
Dec 12 16:43:33 localhost dhclient: bound to 192.168.1.65 -- renewal in 54 seconds.
Dec 12 16:43:33 localhost NetworkManager[505]: bound to 192.168.1.65 -- renewal in 54 seconds.
Dec 12 16:43:40 localhost dhcpd: Internet Systems Consortium DHCP Server 4.3.1
Dec 12 16:43:40 localhost dhcpd: Copyright 2004-2014 Internet Systems Consortium.
Dec 12 16:43:40 localhost dhcpd: All rights reserved.
Dec 12 16:43:40 localhost dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Dec 12 16:43:40 localhost dhcpd: Internet Systems Consortium DHCP Server 4.3.1
Dec 12 16:43:40 localhost dhcpd: Copyright 2004-2014 Internet Systems Consortium.
Dec 12 16:43:40 localhost dhcpd: All rights reserved.
Dec 12 16:43:40 localhost dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Dec 12 16:43:40 localhost dhcpd: Wrote 0 deleted host decls to leases file.
Dec 12 16:43:40 localhost dhcpd: Wrote 0 new dynamic host decls to leases file.
Dec 12 16:43:40 localhost dhcpd: Wrote 0 leases to leases file.
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: No subnet declaration for eth0 (no IPv4 addresses).
Dec 12 16:43:40 localhost dhcpd: ** Ignoring requests on eth0.  If this is not what
Dec 12 16:43:40 localhost dhcpd:    you want, please write a subnet declaration
Dec 12 16:43:40 localhost dhcpd:    in your dhcpd.conf file for the network segment
Dec 12 16:43:40 localhost dhcpd:    to which interface eth0 is attached. **
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: Not configured to listen on any interfaces!
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: If you think you have received this message due to a bug rather
Dec 12 16:43:40 localhost dhcpd: than a configuration issue please read the section on submitting
Dec 12 16:43:40 localhost dhcpd: bugs on either our web page at www.isc.org or in the README file
Dec 12 16:43:40 localhost dhcpd: before submitting a bug.  These pages explain the proper
Dec 12 16:43:40 localhost dhcpd: process and the information we find helpful for debugging..
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: exiting.
Dec 12 16:43:42 localhost isc-dhcp-server[5729]: Starting ISC DHCP server: dhcpdcheck syslog for diagnostics. ... failed!
Dec 12 16:43:42 localhost isc-dhcp-server[5729]: failed!
Dec 12 16:43:42 localhost systemd[1]: isc-dhcp-server.service: control process exited, code=exited status=1
Dec 12 16:43:42 localhost systemd[1]: Failed to start LSB: DHCP server.
Dec 12 16:43:42 localhost systemd[1]: Unit isc-dhcp-server.service entered failed state.

Should I hide my ip address?

  • 1
    Did you do what to those two lines say, i.e. run systemclt and look at the journal? Please post the output from journalctl -xn generated (might have to sudo it) while you try to rerun apt-get install -f – Anthon Dec 12 '14 at 6:14
  • 1
    So it's dhcpd that isn't starting, and we're getting only the end of its messages here. Looks like it's complaining about dhcpd.conf missing some required information. You need to go a bit further back in the system logs, to see the whole series of messages from dhcpd. On a traditional system the logs should be in /var/log/syslog, I don't know if systemd messes that up. – Gilles 'SO- stop being evil' Dec 12 '14 at 22:16
5

It seems your network configuration isn't matching your subnet declaration in dhcp.conf. Make sure that you have an IP address from the 10.10.1.0/24 subnet configured. You can check this using:

ip a

If you don't see such an IP address try adding it to e. g. eth0:

ip a a 10.10.1.200/24 dev eth0

After that try again fixing the package:

apt-get install -f

If I'm correct, it should install the package and start the DHCP daemon and you might want to persist this IP address in /etc/network/interfaces

| improve this answer | |
  • 2
    Note: ip a a stands for ip address add – mxmlnkn May 18 '16 at 22:53
  • had this error on my rasp pi and couldnt start service, turned out no IP address in ip a command output. after adding ip address everything worked – Manny265 Jan 19 '18 at 20:21
  • @Manny265 Your comment doesn't make sense; the reason you run DHCP is that it should assign an IP address for you automatically. – tripleee May 23 '19 at 5:01
3

Your problem is here:

Dec 12 16:43:40 localhost dhcpd: No subnet declaration for eth0 (no IPv4 addresses).
Dec 12 16:43:40 localhost dhcpd: ** Ignoring requests on eth0.  If this is not what
Dec 12 16:43:40 localhost dhcpd:    you want, please write a subnet declaration
Dec 12 16:43:40 localhost dhcpd:    in your dhcpd.conf file for the network segment
Dec 12 16:43:40 localhost dhcpd:    to which interface eth0 is attached. **
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: Not configured to listen on any interfaces!
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: If you think you have received this message due to a bug rather
Dec 12 16:43:40 localhost dhcpd: than a configuration issue please read the section on submitting
Dec 12 16:43:40 localhost dhcpd: bugs on either our web page at www.isc.org or in the README file
Dec 12 16:43:40 localhost dhcpd: before submitting a bug.  These pages explain the proper
Dec 12 16:43:40 localhost dhcpd: process and the information we find helpful for debugging..
Dec 12 16:43:40 localhost dhcpd: 
Dec 12 16:43:40 localhost dhcpd: exiting.

You should be able to reproduce the error message by running dhcpd -t -cf /etc/dhcp/dhcpd.conf.


I'm guessing that you want to share a wireless Internet connection to other hosts on Ethernet, as in the topology diagram below.

                            ↑
                            │ Uplink
                            │
               ┌────────────┴────────────┐
               │          wlan0          │
               │     192.168.1.65/24     │
               │                         │
               │        semplice         │
               │                         │
               │       10.10.1.1/24      │
               │          eth0           │
               └────────────┬────────────┘
                            │
     ┌──────────────┬───────┴────────┬──────────────┐
     │              │                │              │
   Host 1         Host 2           Host 3         Host 4
 10.10.1.21     10.10.1.22       10.10.1.23     10.10.1.24

I'm assuming that your server's address for eth0 is 10.10.1.1. Verify that by running ip addr show dev eth0.

Then you must configure /etc/dhcp/dhcpd.conf to hand out addresses on the eth0 interface. Out of the box, dhcpd is configured not to respond to anything, because an inadvertently running rogue DHCP server would wreak havoc on a network by handing out addresses to any host that asks for one.

In /etc/dhcp/dhcpd.conf, you'll need a stanza like the following:

subnet 10.10.1.0 netmask 255.255.255.0 {
    option subnet-mask        255.255.255.0;
    option broadcast-address  10.10.1.255;
    option routers            10.10.1.1;
    pool {
        range 10.10.1.21 10.10.1.254;
    }
}

… in addition to declarations such as authoritative, domain-name, domain-name-servers, and default-lease-time. (Adjust as necessary. Only you know what settings you want for your network.)

Also, for Debian, you'll need to edit /etc/default/isc-dhcp-server to set

INTERFACES="eth0"

so that the server will listen on the Ethernet port. (You do not want to listen on wlan0; your wireless access point would be responsible for handing out addresses to wireless clients.)

| improve this answer | |
  • 2
    His problem is that systemd is ignoring the lsb init info of the old init script, which clearly states "# Required-Start: $remote_fs $network $syslog". Instead of waiting for the network units it starts it will parallelize dhcpd to run even before that. – Florian Heigl Sep 19 '17 at 22:36
  • A valid /etc/dhcp/dhcpd.conf configuration file should be used to solve this problem. The isc-dhcp-server service will fail using a wrong dhcpd.conf configuration. – GAD3R Oct 10 '18 at 8:58

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