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If you've turned off DHCP on the network then the machine won't be able to get an address. &nbsp;You'd have to set a static address instead.
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IT Manager

mikerigel

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I am missing configuration info in the network dialog box.<br />
<a href="https://filedb.experts-exchange.com/incoming/2018/11_w45/1401044/20181110_103400.jpg" target="_blank" title="Missing (504 KB)"><img alt="Missing" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2018/11_w45/800_1401044/20181110_103400.jpg" /></a>The computer used to get on the Internet but was using a rogue router that had been set up with DHCP. &nbsp;We turned off DHCP on that router so we can use our main router.<br />
Now the Ubuntu 18.04 machine won't grab an IP address.
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20181110_103400.jpg

I am missing configuration info in the network dialog box.

The computer used to get on the Internet but was using a rogue router that had been set up with DHCP.  We turned off DHCP on that router so we can use our main router.
Now the Ubuntu 18.04 machine won't grab an IP address.

Cannot configure network interface on Ubuntu

The Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks and an extension of the Bootstrap Protocol. DHCP allows for computers to be configured automatically to communicate with each other over an IP network without the need for manual setup by a network administrator. The implementation of DHCP relies on a DHCP server to hand out network configuration information to DHCP-capable clients that request an IP address (and other information required or useful in communicating with other devices on an IP network). In addition to an IP address, common configuration information served over DHCP includes a default gateway, subnet mask and DNS sever(s).

DHCP

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things.