Using debian, and installed *isc-dhcp-server* via the following command
sudo apt -y install isc-dhcp-server
After agreeing to any dependencies, the follow error message was thrown
Job for isc-dhcp-server.service failed because the control process exited with error code.
See "systemctl status isc-dhcp-server.service" and "journalctl -xe" for details.
Ive restarted my machine, and also tried to run the followng
sudo service isc-dhcp-server start
This just re-prints the same error message as above.
The error asks to run **systemctl status isc-dhcp-server.service** which returns
● isc-dhcp-server.service - LSB: DHCP server
Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
Active: failed (Result: exit-code) since Mon 2024-03-11 00:33:46 GMT; 12min ago
Docs: man:systemd-sysv-generator(8)
Process: 2980 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=1/FAILURE)
**sudo journalctl -u isc-dhcp-server.service** returns
isc-dhcp-server[5786]: Launching IPv4 server only.
dhcpd[5793]: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
dhcpd[5793]: subnet 192.168.2.101 netmask 255.255.255.0
dhcpd[5793]: ^
dhcpd[5793]: Configuration file errors encountered -- exiting
dhcpd[5793]:
dhcpd[5793]: If you think you have received this message due to a bug rather
dhcpd[5793]: than a configuration issue please read the section on submitting
isc-dhcp-server[5786]: dhcpd self-test failed. Please fix /etc/dhcp/dhcpd.conf.
isc-dhcp-server[5786]: The error was:
dhcpd[5793]: bugs on either our web page at www.isc.org or in the README file
dhcpd[5793]: before submitting a bug. These pages explain the proper
dhcpd[5793]: process and the information we find helpful for debugging.
dhcpd[5793]:
dhcpd[5793]: exiting.
dhcpd[5797]: Internet Systems Consortium DHCP Server 4.4.1
isc-dhcp-server[5797]: Internet Systems Consortium DHCP Server 4.4.1
isc-dhcp-server[5797]: Copyright 2004-2018 Internet Systems Consortium.
isc-dhcp-server[5797]: All rights reserved.
isc-dhcp-server[5797]: For info, please visit https://www.isc.org/software/dhcp/
dhcpd[5797]: Copyright 2004-2018 Internet Systems Consortium.
dhcpd[5797]: All rights reserved.
dhcpd[5797]: For info, please visit https://www.isc.org/software/dhcp/
dhcpd[5797]: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
dhcpd[5797]: subnet 192.168.2.101 netmask 255.255.255.0
isc-dhcp-server[5797]: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
isc-dhcp-server[5797]: subnet 192.168.2.101 netmask 255.255.255.0
isc-dhcp-server[5797]: ^
isc-dhcp-server[5797]: Configuration file errors encountered -- exiting
isc-dhcp-server[5797]: If you think you have received this message due to a bug rather
isc-dhcp-server[5797]: than a configuration issue please read the section on submitting
isc-dhcp-server[5797]: bugs on either our web page at www.isc.org or in the README file
isc-dhcp-server[5797]: before submitting a bug. These pages explain the proper
isc-dhcp-server[5797]: process and the information we find helpful for debugging.
isc-dhcp-server[5797]: exiting.
MY MACHINE CONFIG FILES
-----------------------
sudo nano /etc/dhcp/dhcpd.conf
...
# option definitions common to all supported networks...
option domain-name "example.org";
option domain-name-servers 8.8.8.8;
...
subnet 192.168.2.101 netmask 255.255.255.0 {
option routers pepper.spices.org;
}
...
authoritative;
...
And
sudo /etc/default/isc-dhcp-server
...
DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
...
INTERFACESv4="eth0"
...