title: linux route specific machine traffic throw specific output interface
body: <p>I have a linux machine Iam using as a router with multible interfaces and multible internet connection
  say eth0--isp1</p>
  
  <pre><code>eth1--isp2
  
  eth2--isp3
  </code></pre>
  
  <p>the gateway is eth0 throw isp1</p>
  
  <p>and eth3--local1 10.0.0.x</p>
  
  <pre><code>eth4--local2 192.168.1.x
  </code></pre>
  
  <p>i need local1 ip 192.168.1.10 to go throw isp3, eth2</p>
  
  <p>thanks</p>