Using socat to forward traffic from a network interface to the loopback address on which ADB is listening.

socat-adb-forwarding.sh

#!/bin/bash

set -e

# Installing required packages for the Android SDK
# and the emulator.
sudo apt update -y && \
  DEBIAN_FRONTEND=noninteractive sudo apt install -y --no-install-recommends \
    socat \
    iproute2 

# The local ADB port.
ADB_PORT=5555

# Resolving the IP address of the network interface.
LOCAL_IP=$(curl --silent http://169.254.169.254/latest/meta-data/local-ipv4)

# Running socat in the background to forward TCP traffic
# between the network interface and the loopback address.
socat tcp-listen:"$ADB_PORT",bind="$LOCAL_IP",tcp-nodelay,fork tcp:127.0.0.1:"$ADB_PORT" &