added client side attack env to virtual lab and server side tcp

virtual-test-environment/routers/gateway/Vagrantfile

@@ -1,5 +1,4 @@
 # -*- mode: ruby -*-
-
 # vi: set ft=ruby :
 
 Vagrant.configure(2) do |config|
@@ -10,6 +9,7 @@ Vagrant.configure(2) do |config|
 
   config.ssh.insert_key = true
   config.vm.network "private_network", ip: "192.168.1.2", virtualbox__intnet: "intnet-1"
+
   config.vm.network "private_network", ip: "172.16.4.254", virtualbox__intnet: "intnet-4"
 
   config.vm.provider "virtualbox" do |vb|