Qubes-OS allow two appvms to talk to each other

qvm-talk.sh

#!/bin/bash
vm1=$1
vm2=$2
fw=$3
ip1=`qvm-run -p -u root ${vm1} "ifconfig eth0 | grep 'inet ' | column -t | cut -d ' ' -f3"`
ip2=`qvm-run -p -u root ${vm2} "ifconfig eth0 | grep 'inet ' | column -t | cut -d ' ' -f3"`

if [ -z ${fw} ]; then
    fw=sys-firewall
fi

exe="iptables -I FORWARD 2 -s ${ip1} -d ${ip2} -j ACCEPT && iptables -I FORWARD 2 -s ${ip2} -d ${ip1} -j ACCEPT"
#echo ${exe}
echo ${vm1} ${ip1}
echo ${vm2} ${ip2}

qvm-run -p -u root ${fw} "${exe}"