Wrote this for a friend to set up the routes, sharing in case anyone finds it useful

[Kreyren]

#!/usr/bin/env sh
# shellcheck shell=sh # POSIX

# Script that does things from https://github.com/Soreepeong/XivMitmLatencyMitigator

set -e # Exit on false return

command -v einfo >/dev/null || einfo() { printf "INFO: %s\n" "$1" ;}
command -v ewarn >/dev/null || ewarn() { printf "WARN: %s\n" "$1" ;}
command -v die >/dev/null || die() { printf "FATAL: %s\n" "$2"; exit 1 ;}

ewarn "Script not sanitized, do not re-run"

[ "$(id -u)" = 0 ] || die 3 "Requires running as root, use sudo?"

read -p "Enter VM IP: " vmIP

case "$(uname -s)" in
				"Linux")
								${ROUTE:-"route"} -n add -net 124.150.157.0/24 "$vmIP"
								${ROUTE:-"route"} -n add -net 153.254.80.0/24 "$vmIP"
								${ROUTE:-"route"} -n add -net 202.67.52.0/24 "$vmIP"
								${ROUTE:-"route"} -n add -net 204.2.29.0/24 "$vmIP"
								${ROUTE:-"route"} -n add -net 80.239.145.0/24 "$vmIP"
				;;
				"Windows")
								command -v ${ROUTE:-"route"} >/dev/null
								${ROUTE:-"route"} add 124.150.157.0 mask 255.255.255.0 "$vmIP"
								${ROUTE:-"route"} add 153.254.80.0 mask 255.255.255.0 "$vmIP"
								${ROUTE:-"route"} add 202.67.52.0 mask 255.255.255.0 "$vmIP"
								${ROUTE:-"route"} add 204.2.29.0 mask 255.255.255.0 "$vmIP"
								${ROUTE:-"route"} add 80.239.145.0 mask 255.255.255.0 "$vmIP"
				;;
				*) die 1 "Operating system '$(uanme -s)' is not implemented"
esac

[bankjaneo]

The very last line 'uanme -s' -> 'uname -s'

Cheers!✌️