Both NICs on CaptureCast units are configured for DHCP by default, so if you need to use on-unit static IP configuration, or use DNS other than the one used by your gateway, you'll need to configure the network manually. This will need to be done on the unit itself, using a connected monitor and keyboard/mouse.
Start by clicking in the top right corner of the screen, and then click on the networking section in the menu that appears. The text here will differ depending which NICs are being actively used, but the submenu containing "Wired Settings" will always pop out, which you'll need to click.
In the menu that pops up, we'll need to pick which network to configure. In the example screenshot, only one of the NICs have been connected, but the following configuration steps can be used with either or both NICs depending on your desired network configuration, simply click the cogwheel next to the network you need to configure. For reference, the "top" NIC on the CaptureCast unit is "Intel Ethernet", while the "bottom" NIC is "Aquantia Ethernet".
Once the cogwheel has been clicked, a new menu will appear with the details of the network connection if it is actively connected. For the purposes of this article, we'll assume you're configuring an IPv4 network, so click on the IPv4 tab.
Once in the IPv4 menu, you can manually enter static IP addresses after toggling the IPv4 Method to Manual. At any point, even if you are using a manual address, you can toggle the DNS or routes off automatic and enter manual configurations. Note that you can enter as many DNS servers as you want while separating them with commas. If you have any questions about what to put in any of these fields, please consult with your organization's network professionals
Once you've configured everything to your liking, simply click Apply. You may need to reconnect the network physically in order for the new settings to take effect.