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Raspberry Pi

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  • You want the other pi's to use 192.168.1.1 as their default route and you want pi_0 to IP forward, NAT, and masquerade packets from (and to) them through to/from the router. Commented Aug 28, 2016 at 17:36
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    Let's assume the rpi network uses the subnet 192.168.1.0/24. As long as the external network uses another subnet (e.g. 10.0.0.0/24) it's sufficient to set the default route of all pi's to 192.168.1.1 and define a static route in the router to the 192.168.1.0/24 subnet via the IP the head node has in the 10.0.0.0/24 subnet (e.g. 10.0.1.1). All other pc's have the default route set to the router who then will route all requests to the rpi's to the head node which forwards the request. Commented Aug 28, 2016 at 20:25
  • Follow this. Assume that the internal network is the LAN and your main network is the WAN. Commented Aug 29, 2016 at 3:12
  • Pi_0 as a simple router is sufficient and there is no natting and masquerading required. It will work also this way but introduces additional configuration complexity and requires additional iptables definitions to be able to initiate network connections to the natted devices. Commented Aug 30, 2016 at 20:34