Adding a second IP to Debian Server

I was given a second IP by my server provider. I am running Debian 5.0. I thought I knew how to add the IP to the system and configure with apache, but I have not yet been able to.

The primary IP works fine and I have a few sites already running on that one.

What steps would I take to add this second IP so that I use it in apache?

From serverfault David

• You are supposed to configure a new alias for your second ip.

  The mandatory resources for ip management are the file /etc/network/interfaces and the ip tool from iproute package.

  Where are things breaking? what doesn't work?

  From scyldinga

• Assuming the new IP address is on the same subnet as the first, add a second virtual interface (sometimes called an "alias") to the primary network interface. This is configured, like all network interface settings, in /etc/network/interfaces. The Debian Reference manual has a section on the topic:

  http://www.debian.org/doc/manuals/debian-reference/ch05.en.html#%5Fthe%5Fvirtual%5Finterface

  A simple example, assuming your primary network interface is eth0 and has an ip of 192.168.1.1 and the new ip is 192.168.1.2:

  auto eth0
  iface eth0 inet static
    address 192.168.1.1
    netmask 255.255.255.0
    gateway 192.168.1.254
  
  auto eth0:0
  iface eth0:0 inet static
    address 192.168.1.2
    netmask 255.255.255.0
  

  Once the appropriate settings have been added to /etc/network/interfaces, run ifup eth0:0 to activate the new interface.

  If, however, the new ip is on a different subnet, you need to either provision the ip on a physically distinct network interface or create a VLAN interface, depending on how your ISP is prepared to hand it off to you. That's a whole new topic.

  David : Thanks for the answer. I tried following these instructions, but when I restart the network interfaces I receive this error: :/etc# /etc/init.d/networking restart Reconfiguring network interfaces...SIOCDELRT: No such process if-up.d/mountnfs[eth0]: waiting for interface eth0:0 before doing NFS mounts (warning). done. The subnet is the same for the ips, so from what I know and read this above solution should work. The virtual host that I setup are not working and I get network timeout on the domain.

  Insyte : The warnings sound reasonable. The fact that it makes reference to waiting for eth0:0 is good news. What do your network interfaces look like after restarting networking? Specifically, what does the output of "`ifconfig -a`" look like?
  From Insyte

• If you use the iproute package, you can put this in /etc/network/interfaces:

  auto eth0
  iface eth0 inet static
      address 10.0.0.17
      netmask 255.0.0.0
      gateway 10.0.0.1
      up   ip addr add 10.0.0.18 dev eth0
      down ip addr del 10.0.0.18 dev eth0
  

  From hop

• Even Simpler:

  Use an "addresses" line in /etc/network/interfaces

  iface eth1 inet static
          address 10.10.0.66
          netmask 255.255.255.240
          network 10.10.0.64
          broadcast 10.10.0.79
          gateway 10.10.0.65
          addresses 10.10.0.67/28 10.10.0.67/28 10.10.0.68/28
  

  You can use a space seperated list of IPs/CIDR netmasks.

  This is a crippled version of my interface definition (IPs changed and only relevant part)

  From $pageUsers[$post.author].name