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{{Legacy}}
This article describes how to assign public IPs to containers running on OVZ Hardware Nodes in case you have a following network topology:
[[Image:PrivateIPs_fig1.gif|An initial network topology]]
== Using a spare IP in the same range ==
If you have a spare IP to use, you could assign this as a subinterface and use this as nameserver:
<pre>[HN] ifconfig eth0:1 *.*.*.*
[HN] vzctl set 101 --nameserver *.*.*.*</pre>
== Prerequisites ==
[[Basic_operations_in_OpenVZ_environment|container(s) created]]. If not, follow the links to perform the steps needed.
{{Note|don't assign an IP after container creation.}}
== An OVZ Hardware Node has the only one Ethernet interface ==
=== Hardware Node configuration ===
{{Warning|if you are '''configuring''' the node '''remotely''' you '''must''' prepare a '''script''' with the below commands and run it in background with the redirected output or you'll '''lose the access''' to the Node.}}
==== Create a bridge device ====
[HN]# ip route add default via 10.0.0.1 dev br0
==== A script example ====
==== Edit the container's configuration ====
Add these parameters to the <code>/etc/vz/conf/$CTID.conf</code> file which will be used during the network configuration:
* Add <code>VE_DEFAULT_GATEWAY="CT DEFAULT GATEWAY"</code>
* Add <code>BRIDGEDEV="BRIDGE NAME"</code> (a bridge name to which the container veth interface should be added)
An example:
<pre>
# Network customization section
VETH_IP_ADDRESS="85.86.87.195/26"
VE_DEFAULT_GATEWAY="85.86.87.193"
exit 0
</pre>
<p><small>Note: this script can be easily extended to work for multiple triples <bridge, ip address, veth device>, see http://viresosysadmin-ivanov.blogspot.com/2008/02/2-veth-with-2-brindgesbridges-on-openvz-at.html </small></p>
==== Make the script to be run on a container start ====
==== Create On-umount script for remove HW → CT route(s) ====
which should be called each time a container with VEID (<code>/etc/vz/conf/$VEID.umount</code>), or any container (<code>/etc/vz/conf/vps.umount</code>) is stopstopped.
<pre>