Use the DNS Source Configuration page to specify the physical or logical interface to use as the DNS client source interface. When an IP address is configured on the source interface, this address is used for all DNS communications between the local DNS client and the remote DNS server. The IP address of the designated source interface is used in the IP header of DNS management protocol packets. This allows security devices, such as firewalls, to identify all source packets coming from a specific device.
To access the DNS Source Interface Configuration page, click in the menu.
DNS Source Interface Configuration Fields
| Field | Description |
|---|---|
| Type | The type of interface to use as the source interface:
|
| Interface | When the selected Type is Interface, select the physical port to use as the source interface. |
| Loopback Interface | When the selected Type is Loopback, select the loopback interface to use as the source interface. |
| VLAN ID | When the selected Type is VLAN, select the VLAN to use as the source interface. The menu contains only the VLAN IDs for VLAN routing interfaces. |
| Tunnel ID | When the selected Type is Tunnel, select the tunnel interface to use as the source interface. |
If you change any of the parameters, click Submit to apply the changes to the system. If you want the switch to retain the new values across a power cycle, you must save the configuration.
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