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// This is an example configuration file for the DHCPv4 server in Kea.
// It is a basic scenario with one IPv4 subnet configured and with DDNS
// enabled.
{ "Dhcp4":
{
// Kea is told to listen on eth0 interface only.
"interfaces-config": {
"interfaces": [ "eth0" ]
},
// We need to specify the database used to store leases. As of
// June 2022, three database backends are supported: MySQL,
// PostgreSQL and the in-memory database, Memfile.
// We'll use memfile because it doesn't require any prior set up.
"lease-database": {
"type": "memfile",
"lfc-interval": 3600
},
// Addresses will be assigned with a lifetime of 4000 seconds.
"valid-lifetime": 4000,
// Renew and rebind timers are commented out. This implies that options
// 58 and 59 will not be sent to the client. In this case it is up to
// the client to pick the timer values according to RFC2131. Uncomment the
// timers to send these options to the client.
// "renew-timer": 1000,
// "rebind-timer": 2000,
// The following list defines subnets. We have only one subnet
// here. We tell Kea that it is directly available over local interface.
"subnet4": [
{
"pools": [ { "pool": "192.0.2.1 - 192.0.2.200" } ],
"subnet": "192.0.2.0/24",
"interface": "eth0"
}
],
// Enable connectivity with kea-dhcp-ddns
// (Required for dynamic DNS updates)
"dhcp-ddns" : {
"enable-updates" : true,
"server-ip" : "192.0.2.0",
"server-port" : 3432,
"sender-ip" : "192.0.2.1",
"sender-port" : 3433,
"max-queue-size" : 2048,
"ncr-protocol" : "UDP",
"ncr-format" : "JSON"
},
// Enable DDNS updates and configure DDNS update behavior
"ddns-send-updates" : true,
"ddns-override-no-update" : true,
"ddns-override-client-update" : true,
"ddns-replace-client-name" : "when-present",
"ddns-generated-prefix" : "test.prefix",
"ddns-qualifying-suffix" : "test.suffix.",
"ddns-update-on-renew" : false,
"ddns-use-conflict-resolution" : true,
"hostname-char-set": "[^A-Za-z0-9.-]",
"hostname-char-replacement": "x",
// The following configures logging. It assumes that messages with at
// least informational level (info, warn, error and fatal) should be
// logged to stdout.
"loggers": [
{
"name": "kea-dhcp4",
"output_options": [
{
"output": "stdout"
}
],
"severity": "INFO"
}
]
}
}
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