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Proxying FiveM Connections using Nginx

As of server version 2377, support was added to FiveM to run a custom streaming proxy similar to cfx.re, but proxying the data connection (UDP) as well. This can be accomplished very easily with nginx acting as a proxy, and you can combine the caching proxy with it.

Requirements

Nginx 1.17+ (1.16 absolute minimum, guide tested on 1.17)
Server with reasonable network bandwidth (500mbps uplink strongly suggested)
FXserver version 2377 or later
SSL certificate for the domain you're using (highly recommended)

FASTBuild is an open-source distributed build system, which could be a free alternative to Incredibuild. Unreal Engine 4 (UE4) does not support FASTBuild natively, however it's not hard to integrate it manually.

Integrate FASTBuild with UE4

Install FASTBuild

We assume you already have the full UE4 source code. First you'll need to grab the latest FASTBuild tools from here. We use v0.93 Windows x64 version in this tutorial. Download it and extract all the files. Here you have several choices:

Place the files under any folder which could be found with your system's PATH environment variable. To see where these folders are, run the PATH command in a command prompt window;
Place the files under the Engine\Binaries\ThirdParty\FASTBuild folder of your engine. This is the recommended place;
Place the files anywhere you like. This is not recommended because you'll have to hard-code the path later.

	<?xml version='1.0' ?>

	<!--
	Why is this one giant script instead of a bunch of smaller scripts?
	Mostly this comes down to BuildGraph and personal preference. As the language BuildGraph isn't
	really much of a programming language there is no easy way to use an IDE and jump between
	includes, find usages of variables, and just generally quickly search things. It was found to
	be easier to have a single large file that a developer can quickly jump up and down in when
	trying to understand what the BuildGraph script is doing.

	const pw = require('playwright');
	const UserAgent = require('user-agents');
	const uuid = require('uuid');
	const tmp = require('tmp-promise');

	const UINT32_MAX = (2 ** 32) - 1;
	const WEBGL_RENDERERS = ['ANGLE (NVIDIA Quadro 2000M Direct3D11 vs_5_0 ps_5_0)', 'ANGLE (NVIDIA Quadro K420 Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (NVIDIA Quadro 2000M Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (NVIDIA Quadro K2000M Direct3D11 vs_5_0 ps_5_0)', 'ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (Intel(R) HD Graphics Family Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (ATI Radeon HD 3800 Series Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (Intel(R) HD Graphics 4000 Direct3D11 vs_5_0 ps_5_0)', 'ANGLE (Intel(R) HD Graphics 4000 Direct3D11 vs_5_0 ps_5_0)', 'ANGLE (AMD Radeon R9 200 Series Direct3D11 vs_5_0 ps_5_0)', 'ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (Intel(R) HD Graphics Family Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0)', 'ANGLE (Intel(R) HD Graphics Family Direct3D

	# this forces Arena into full screen mode on startup, set back to 3 to reset
	# note that if you go into the Arena "Graphics" preference panel, it will reset all of these
	# and you will need to run these commands again
	defaults write com.wizards.mtga "Screenmanager Fullscreen mode" -integer 0
	defaults write com.wizards.mtga "Screenmanager Resolution Use Native" -integer 0

	# you can also replace the long complicated integer bit with any other scaled 16:9
	# resolution your system supports.
	# to find the scaled resolutions, go to System Preferences --> Display and then
	# divide the width by 16 and multiple by 9. on my personal system this ends up

	import * as alt from 'alt';
	import * as native from 'natives';

	let cameraControlsInterval;
	let camera;
	let zpos = 0;
	let fov = 90;
	let startPosition;
	let startCamPosition;
	let timeBetweenAnimChecks = Date.now() + 100;

	$userPath = $env:USERPROFILE
	$pathExclusions = New-Object System.Collections.ArrayList
	$processExclusions = New-Object System.Collections.ArrayList

	$pathExclusions.Add('C:\source\repos') > $null
	$pathExclusions.Add('C:\Windows\Microsoft.NET') > $null
	$pathExclusions.Add('C:\Windows\assembly') > $null
	$pathExclusions.Add($userPath + '\AppData\Local\Microsoft\VisualStudio') > $null
	$pathExclusions.Add($userPath + '\AppData\Local\Microsoft\VisualStudio Services') > $null
	$pathExclusions.Add($userPath + '\AppData\Local\GitCredentialManager') > $null

	#!/usr/bin/python3

	# MIT License
	#
	# Copyright (c) 2017 Marcel de Vries
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy
	# of this software and associated documentation files (the "Software"), to deal
	# in the Software without restriction, including without limitation the rights
	# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

	local function wait_png(matstr)
	local html = vgui.Create("DHTML")
	html:AddFunction("console", "memeify", function()
	html.done = true
	end)
	local mat = Material(matstr)
	local rw, rh = mat:GetInt "$realwidth", mat:GetInt "$realheight"

	local f = file.Open("materials/"..matstr, "rb", "GAME")
	local cont = f:Read(f:Size())