VanillaCord downloads and patches a vanilla Minecraft server so you can use IP forwarding.
java -jar VanillaCord.jar <version> [secret]
where <version> is the version of minecraft you want to select
and [secret] is your forwarding secret, but only if you want to use Velocity modern IP forwarding
For Minecraft 1.7.10, 1.8, 1.9, 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, snapshots, and pre-releases
https://dev.me1312.net/jenkins/job/VanillaCord