Which IP address is nginx or apache using while making outbound request?

outbound-traffic-over-floating-ip.sh

# 1. Option: From the Terminal

# Get internal ip addresses
hostname -I

# Get the ip address which is starting with 10.XXX.XXX.XXX from the output.
# And place it in the command below.
wget --bind-address=10.XXX.XXX.XXX https://example.com


# 2. Option: From the shell script

#!/bin/bash

hostnames=$(hostname -I);
anchor_ip=$([[ "$hostnames" =~ 10\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3} ]] && echo $BASH_REMATCH);
wget --bind-address=10.XXX.XXX.XXX https://example.com