Roaring Penguin Pppoe Server ((free)) -

The pppoe-server component works alongside the standard Linux pppd daemon to handle incoming connection requests. Key features include:

The software isn't just a server; it is a full suite of utilities designed to manage every stage of a PPPoE connection: roaring penguin pppoe server

The Roaring Penguin server is favored in specialized environments like and laboratory testing for several reasons: rp-pppoe - Википедия roaring penguin pppoe server

sudo yum install rp-pppoe

The server is a legendary user-space implementation of the Point-to-Point Protocol over Ethernet. Created by Roaring Penguin Software Inc. (now part of Dianne Skoll’s projects), it has served as the backbone for Linux-based DSL connectivity and ISP emulation for over two decades. roaring penguin pppoe server

Example: