DHCP : Configure DHCP Server2019/10/02 |
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Configure DHCP ( Dynamic Host Configuration Protocol ) Server to assign IP addresses to client hosts in local network.
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| [1] | Install and Configure DHCP. On this example, it shows only for IPv4 configuration. |
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[root@dlp ~]#
dnf -y install dhcp-server
[root@dlp ~]#
vi /etc/dhcp/dhcpd.conf # create new # specify domain name option domain-name "srv.world"; # specify DNS server's hostname or IP address option domain-name-servers dlp.srv.world; # default lease time default-lease-time 600; # max lease time max-lease-time 7200; # this DHCP server to be declared valid authoritative; # specify network address and subnetmask
subnet 10.0.0.0 netmask 255.255.255.0 {
# specify the range of lease IP address
range dynamic-bootp 10.0.0.200 10.0.0.254;
# specify broadcast address
option broadcast-address 10.0.0.255;
# specify gateway
option routers 10.0.0.1;
}
systemctl enable --now dhcpd |
| [2] | If Firewalld is running, allow DHCP service. DHCP Server uses [67/UDP]. |
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[root@dlp ~]# firewall-cmd --add-service=dhcp --permanent success [root@dlp ~]# firewall-cmd --reload success |
| [3] | It's possible to see leased IP address in the file below from DHCP Server to DHCP Clients. |
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[root@dlp ~]# ll /var/lib/dhcpd total 40 -rw-r--r-- 1 dhcpd dhcpd 0 Apr 24 23:16 dhcpd6.leases -rw-r--r-- 1 dhcpd dhcpd 19311 Aug 5 14:49 dhcpd.leases -rw-r--r-- 1 dhcpd dhcpd 18144 Aug 5 14:19 dhcpd.leases~[root@dlp ~]# cat /var/lib/dhcpd/dhcpd.leases
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.3.6
# authoring-byte-order entry is generated, DO NOT DELETE
authoring-byte-order little-endian;
lease 10.0.0.218 {
starts 3 2020/08/05 05:47:54;
ends 3 2020/08/05 05:57:54;
cltt 3 2020/08/05 05:47:54;
binding state active;
next binding state free;
rewind binding state free;
hardware ethernet 00:0c:29:e1:f2:53;
uid "\377+\2244\301\000\002\000\000\253\021\011\215\353J2\\\322\272";
client-hostname "dlp";
}
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