title: Routing IP packets from one IP addr to another
body: <p>Can somebody tell me what are the ways of routing packets in a linux system. I have an external and internal network interfaces on my linux system. I want to forward packets arriving at my external network to an internal network.</p>
  
  <p>I do not have iptables. What are the other ways to this? What commands are offered by native linux. Should Netfilter always be enabled for this? My kernel does not come with Netfilter.</p>
  
  <p>So please suggest.</p>
  
  <p>Thanks in advance</p>