Centos: multiple IP addresses
I just bought 10 extra IPs from my host. How do I point these at my CentOS 5 server?
On CentOS you can use a ifcfg-eth?-range? file to assign multiple IP adresses. For example; you want to assign additional IP adresses to your eth0 interface and you don't have any additional addresses assigned yet. Create the file /etc/sysconfig/network-scripts/ifcfg-eth0-range0
:
IPADDR_START=10.0.0.10
IPADDR_END=10.0.0.19
CLONENUM_START=0
When you already have assigned additional IP addresses the CLONENUM_START value should match the next available eth0:x number.
If the IP addresses aren't in order you have to create an ifcfg-eth0:x file for each of the addresses. The content should look like this:
DEVICE=eth0:0
IPADDR=10.0.0.10
NETMASK=255.255.255.0
ONBOOT=yes
Change the DEVICE value to the corresponding filename and run ifup eth0:0 to bring the interface online.
Use IP aliasing on the host.
ifconfig eth0:1 192.168.0.100 netmask 255.255.255.0
ifconfig eth0:2 192.168.0.101 netmask 255.255.255.0
To do it permanently you will have to use the files in /etc/sysconfig/network-scripts/ifcfg-<interface>
And so on. But why do you need multiple IPs for a single host? SSL/TLS?