What does "trust proxy" actually do in express.js, and do I need to use it?

What does "trust proxy" actually do in express.js, and do I need to use it?

node.js nginx express proxy

nginx

POST request not allowed - 405 Not Allowed - nginx, even with headers included

node.js express nginx cross-domain nodemailer

nginx

502 Bad Gateway Deploying Express Generator Template on Elastic Beanstalk

node.js amazon-web-services nginx express

nginx

What's the better approach: serving static files with Express or nginx?

node.js express nginx static-files

nginx

Express - req.ip returns 127.0.0.1

node.js express nginx proxy

nginx

Performance and reliability when using multiple Docker containers VS standard Node cluster

node.js express nginx docker docker-compose

nginx

Serving files stored in S3 in express/nodejs app

node.js nginx amazon-s3 express fileserver

nginx

ExpressJS - Elastic Beanstalk 502 Bad Gateway

node.js amazon-web-services express nginx amazon-elastic-beanstalk

nginx

"Cannot GET" on reverse proxy from Nginx to socket.io on express.js

node.js express nginx socket.io

nginx

How to serve two web applications behind an nginx reverse proxy

express nginx proxy

nginx

Nginx Reverse Proxying to Node.js with Rewrite

javascript node.js nginx express reverse-proxy

nginx

Can we use both NGINX and PM2 for node.js production deployment?

node.js express nginx pm2

nginx

How to forward request IP from NGINX to node.js application?

node.js express ubuntu nginx

nginx

502 Bad Gateway error for my server running with Node JS on nginx proxy

node.js express nginx

nginx

Node Express Unix Domain Socket Permissions

node.js nginx express file-permissions unix-socket

nginx