# Configure DNS servers
<a name="config-cluster-dns"></a>

You can configure a node to use one or more DNS servers. 

These rules apply to working with DNS on a node:
+ If at least one Ethernet interface on the node uses DHCP, you can only use the CLI to work with DNS.
+ If all the Ethernet interfaces have static addresses, you can work with DNS using the web interface or the CLI.

**Where to perform the configuration**

Make sure you perform the configuration on the correct nodes.


****  

| Node | Work on this node? | 
| --- | --- | 
| Primary Conductor Live node | Yes | 
| Secondary Conductor Live node | Yes | 
| Each worker node | Yes | 

**To configure DNS using the web interface**

See the information earlier on this page to determine if you can use the web interface.

1. If the node is a Conductor Live node and if HA is currently enabled, disable it now. Conductor Live redundancy (HA, or *high availability*) must be disabled before you configure Ethernet interfaces. For instructions, see [Disabling Conductor Live HA (high availability)](conductor-live-config-ha-chg.md).

1. For a Conductor Live node, on the Conductor Live web interface, go to the **Settings** page and choose **Network**. Then choose the **Domain Name Servers** tab. 

   For a worker node, on the worker web interface, choose **Settings** from the main menu. Choose the **Network** tab, then choose **Hostname, DNS, & Timing Server**.

1. Enter the IP address for the DNS server Choose **Save**. Another line appears, for you to enter another DNS server, if you want.

**To configure DNS servers using the CLI**

1. If the node is a Conductor Live node and if HA is currently enabled, disable it now. Conductor Live redundancy (HA, or *high availability*) must be disabled before you configure Ethernet interface. For instructions, see [Disabling Conductor Live HA (high availability)](conductor-live-config-ha-chg.md).

1. To configure DNS, see the [Red Hat *Networking Guide*](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-configuring_ip_networking_with_ifcg_files).