Difference between revisions of "DHCP static IP assignation"
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[[Category:Linux]] | [[Category:Linux]] | ||
| + | =Global configuration= | ||
| − | =Access configuration file= | + | |
| + | ==Access configuration file== | ||
The main configuration file is '''/etc/dhcp/dhcpd.conf''' | The main configuration file is '''/etc/dhcp/dhcpd.conf''' | ||
| Line 12: | Line 14: | ||
| − | + | ==Static IP @== | |
| − | =Static IP @= | ||
This new configuration will ONLY accept known clients and give them a static IP @. | This new configuration will ONLY accept known clients and give them a static IP @. | ||
| Line 25: | Line 26: | ||
option broadcast-address 172.16.50.255; | option broadcast-address 172.16.50.255; | ||
option routers 172.16.50.254; | option routers 172.16.50.254; | ||
| − | option domain-name-servers 172.16.50.2, 8.8.8.8; | + | # Google 8.8.8.8 8.8.4.4 |
| + | # OpenDNS 208.67.222.222 208.67.220.220 (https://www.opendns.com/home-internet-security/opendns-ip-addresses/) | ||
| + | option domain-name-servers 172.16.50.2, 208.67.222.222, 8.8.8.8; | ||
option domain-name "mydomain.lan"; | option domain-name "mydomain.lan"; | ||
option ntp-servers 172.16.50.254; | option ntp-servers 172.16.50.254; | ||
| Line 33: | Line 36: | ||
subnet 172.16.50.0 netmask 255.255.255.0 { | subnet 172.16.50.0 netmask 255.255.255.0 { | ||
host client1 { | host client1 { | ||
| − | hardware ethernet | + | hardware ethernet AA:00:DF:E5:F7:D7; |
fixed-address 172.16.50.20; | fixed-address 172.16.50.20; | ||
} | } | ||
host client2 { | host client2 { | ||
| − | hardware ethernet 00: | + | hardware ethernet 00:CD:BC:38:AC:45; |
fixed-address 172.16.50.21; | fixed-address 172.16.50.21; | ||
} | } | ||
| Line 52: | Line 55: | ||
* MAC @ | * MAC @ | ||
* Set a specific static IP @ | * Set a specific static IP @ | ||
| − | |||
| − | |||
| − | |||
| − | |||
=Add new host= | =Add new host= | ||
| − | + | ==Configuration file== | |
| − | |||
Edit the configuration file: | Edit the configuration file: | ||
| Line 68: | Line 66: | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| + | |||
| + | |||
| + | ==Declare new host== | ||
Add new host at the end of the file : | Add new host at the end of the file : | ||
| Line 83: | Line 84: | ||
| + | ==Take on changes== | ||
Restart the DHCP server : | Restart the DHCP server : | ||
Latest revision as of 15:42, 2 August 2015
Contents
Global configuration
Access configuration file
The main configuration file is /etc/dhcp/dhcpd.conf
vim /etc/dhcp/dhcpd.conf
Static IP @
This new configuration will ONLY accept known clients and give them a static IP @.
# Sample /etc/dhcpd.conf
# (add your comments here)
default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 172.16.50.255;
option routers 172.16.50.254;
# Google 8.8.8.8 8.8.4.4
# OpenDNS 208.67.222.222 208.67.220.220 (https://www.opendns.com/home-internet-security/opendns-ip-addresses/)
option domain-name-servers 172.16.50.2, 208.67.222.222, 8.8.8.8;
option domain-name "mydomain.lan";
option ntp-servers 172.16.50.254;
deny unknown-clients;
subnet 172.16.50.0 netmask 255.255.255.0 {
host client1 {
hardware ethernet AA:00:DF:E5:F7:D7;
fixed-address 172.16.50.20;
}
host client2 {
hardware ethernet 00:CD:BC:38:AC:45;
fixed-address 172.16.50.21;
}
}Note:
The deny unknown-clients; command is why only known clients are accepted.
For each client you have to adjust:
- MAC @
- Set a specific static IP @
Add new host
Configuration file
Edit the configuration file:
vim /etc/dhcp/dhcpd.conf
Declare new host
Add new host at the end of the file :
host myNewHost {
hardware ethernet 00:0e:af:31:d1:cc;
fixed-address 172.16.50.60;
option host-name "myNewHost";
}==> Don't forget to the given IP @ must match the DNS server declaration !
Take on changes
Restart the DHCP server :
/etc/init.d/isc-dhcp-server restart
