Kea

Kea är den nya DHCPv4/DHCPv6-servern från ISC och är en ersättare för ISC DHCP. Målet är att skapa en dhcp server med hög performance och utbyggbar med extensions för enterprises eller service providers.

Features

• Fullt fungerande DHCPv4, DHCPv6 och Dynamic DNS server.
• OpenSSL support.
• Leases finns sparat i CSV fil, MySQL eller Postgres.
• On-Line configuration.
• Statistics
• API

Installation

apt-get install build-essential libssl-dev libboost-dev libboost-system-dev make liblog4cplus-dev
wget http://ftp.isc.org/isc/kea/1.0.0/kea-1.0.0.tar.gz && tar -xvf kea-1.0.0.tar.gz
cd kea-1.0.0
./configure --prefix=/
make
make install

Ubuntu

sudo apt-get install kea-dhcp4-server

Fedora

dnf install kea

Konfiguration

Görs i filen /etc/kea/kea.conf. En lista på DHCP options finns bland kea's egna dokumentation.

# Kea DHCP conf by Hackernet.se

{
# DHCPv4 configuration starts in this line
"Dhcp4": {

# Global values
    "valid-lifetime": 4000,
    "renew-timer": 1000,
    "rebind-timer": 2000,

# Next we setup the interfaces to be used by the server.
    "interfaces-config": {
        "interfaces": [ "eth0" ]
    },

# And we specify the type of lease database
    "lease-database": {
        "type": "memfile",
        "persist": true,
        "name": "/var/kea/dhcp4.leases"
    },

# Global options
    "option-data": [
        {
        "name": "domain-name-servers",
        "data": "192.168.1.10, 10.240.100.100"
        },
        {
        "name": "tftp-server-name",
        "data": "192.168.1.200"
        },
        {
        "code": 67,
        "data": "pxelinux.0"
        },
    ],

#Some clients use siaddr field in the DHCPv4 packet, therefore use following command.
"next-server": "192.168.1.200",


# List subnets where we will be leasing addresses.
    "subnet4": [
        {
        "subnet": "10.240.100.0/24",
        "pools": [ { "pool": "10.240.100.20 - 10.240.100.100" } ],
        "option-data": [
        {
        "name": "routers",
        "data": "10.240.100.1"
        },
        {
        "code": 15,
        "data": "hackernet.se"
        },
      ]
    }
  ]


# DHCPv4 configuration ends with this line
},

    "Logging": {
       "loggers": [
        {
        "name": "kea-dhcp4",
        "output_options": [
          {
          "output": "/var/log/kea4.log",
          "maxsize": 20480
          }
        ],
        "severity": "INFO",
        },
      ]
    }

}

Verify

systemctl status kea-dhcp4-server.service
cat /var/kea/dhcp4.leases