cluster - remoteAddr.hostname is always 127.0.0.1

[Ewok167]

How to get client IP? This only happens when using the cluster common port. Deno.serve

[Hexagon]

See the info at https://pup.56k.guru/usage/scaling/#built-in-vs-external-load-balancer

The built-in load balancer (which is enabled when you supply the commonPort option) uses a very simple TCP proxy mechanism (https://github.com/Hexagon/pup/blob/main/lib/core/loadbalancer.ts) that doesn't allow forwarding the IP the way you want.

If you use something like NGINX as an HTTP proxy to the individual cluster ports (startPort...), NGINX will supply you with the X-Forwarded-For header, which will contain the actual client IP.

A solution for this within Pup would be to add a HTTP-specific load balancer, which provide the X-Forwarded-For header.

Let's leave this issue open if anyone is up for a PR