cant start dhcp server

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                          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: Launching IPv4 server only.
    dhcpd: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
    dhcpd: subnet 192.168.2.101 netmask 255.255.255.0
    dhcpd:                                          ^
    dhcpd: Configuration file errors encountered -- exiting
    dhcpd: 
    dhcpd: If you think you have received this message due to a bug rather
    dhcpd: than a configuration issue please read the section on submitting
    isc-dhcp-server: dhcpd self-test failed. Please fix /etc/dhcp/dhcpd.conf.
    isc-dhcp-server: The error was:
    dhcpd: bugs on either our web page at www.isc.org or in the README file
    dhcpd: before submitting a bug.  These pages explain the proper
    dhcpd: process and the information we find helpful for debugging.
    dhcpd: exiting.
    dhcpd: Internet Systems Consortium DHCP Server 4.4.1
    isc-dhcp-server: Internet Systems Consortium DHCP Server 4.4.1
    isc-dhcp-server: Copyright 2004-2018 Internet Systems Consortium.
    isc-dhcp-server: All rights reserved.
    isc-dhcp-server: For info, please visit https://www.isc.org/software/dhcp/ 
    dhcpd: Copyright 2004-2018 Internet Systems Consortium.
    dhcpd: All rights reserved.
    dhcpd: For info, please visit https://www.isc.org/software/dhcp/ 
    dhcpd: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
    dhcpd: subnet 192.168.2.101 netmask 255.255.255.0
    isc-dhcp-server: /etc/dhcp/dhcpd.conf line 13: subnet 192.168.2.101 netmask 255.255.255.0: bad subnet number/mask combination.
    isc-dhcp-server: subnet 192.168.2.101 netmask 255.255.255.0
    isc-dhcp-server:                                          ^
    isc-dhcp-server: Configuration file errors encountered -- 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"
    ...







                        
Asked by IvanP (1 rep)
Mar 11, 2024, 12:55 AM
Last activity: Mar 11, 2024, 08:42 AM
cant start dhcp server

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