| On moving DHCP from an endagered host | ||
|---|---|---|
 | Part VIII. Network-related (also firewall, router, wireless) |  |
| On moving DHCP from an endagered host | ||
|---|---|---|
| | Part VIII. Network-related (also firewall, router, wireless) | |
July 2007
iwi202 Was the DHCP server and it also checked mail for viruses and spam.
Now it is becoming old: it has one bad sector already.
The machine is out of service and I have a week left before my vacation: no time to buy new hardware or do serious migration of users.
I'm moving mailchecking and DHCPto iwi2.
Bring the machine up to date: apt-get update && apt-get dist-upgrade
Configure the IP number statically.
Modify /etc/network/interfaces to contain a stanza:
#iface eth0 inet dhcp iface eth0 inet static address nnn.nnn.nnn.nnn netmask 255.255.255.0
Make sure it finds the nameserver when the NIC comes up.
It seems this thing runs BIND already, it is its own nameserver:
search mydomain.com nameserver 127.0.0.1
install the DHCP daemon: apt-get install dhcp3-server
Enable the DHCP server by editing /etc/default/dhcp3-server:
INTERFACES="eth0"
Set aside the original dhcpd config: cd /etc/dhcp3 && mv dhcpd.conf dhcpd.conf.dist
Copy the DHCP config from the old system, iwi202:
cd /etc/dhcp3 && \
scp root@iwi202:/etc/dhcp3/dhcpd.conf ./ && \
scp -r root@iwi202:/etc/dhcp3/IWI-NET ./
Start the DHCP server: /etc/init.d/dhcp3-server restart
Copy /usr/local/bin/dhcprestart from another host for convenience.
Put the DHCP daemon in the startup scripts: update-rc.d dhcp3-server defaults
And start the DHCP daemon: /etc/init.d/dhcp3-server restart
Remove the DHCP server from the startup scripts: update-rc.d -f dhcp3-server remove
And stop the DHCP daemon: /etc/init.d/dhcp3-server stop