PROXY Protocol

Infrared supportes PROXY Protocol v2.

Receive PROXY Protocol

You can receive PROXY Protocol Headers, but you need to specify your trusted CIDRs. To enable it in Infrared you just have to change this in you global config:

# This is for receiving PROXY Protocol Headers
#
proxyProtocol:
  # Set this to true to enable it.
  # You also need to set trusted CIDRs to use this feature.
  # You can only receive PROXY Protocol Headers from trusted CIDRs.
  #
  receive: false
  
  # List all your trusted CIDRs here.
  # A CIDR is basically a way to talk about a whole range of IPs
  # instead of just one.
  #
  trustedCIDRs:
    - 127.0.0.1/32

Forward Player IPs

You can forward the player IPs via PROXY Protocol. To enable it in Infrared you just have to change this in you proxy config:

# Send a PROXY Protocol Header to the server to
# forward the players IP address.
#
#sendProxyProtocol: true
sendProxyProtocol: true

Paper

In Paper you have to enable it also to work. See the Paper documentation on PROXY Protocol for more.