Routing

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This is the WIP page for routing with ddwrt. Just to have something to start.


In general router works like this:

  unitB-----(10.10.10.0/24)--------unitA---(NAT)---Internet (WAN) connection
    |                                |
clientB                          clientA
(192.168.168.15/24)           (10.0.0.12/24)


Set the (private) subnetwork ip (sub)networks to e.g.:

  • unitA 10.0.0.1/24 Short for: ( address 10.0.0.1 subnet 10.0.0.0 mask 255.255.255.0 = 24 left-to-right binary ones )
  • clientA 10.0.0.12/24
  • unitB 192.168.168.1/24
  • clientB 192.168.168.15/24
  • transfer net 10.10.10.0/24

Routing (static) configurations:

  • tell clientA that unitA is his default gateway (normally done through dhcp)
  • tell clientB that unitB is his default gateway (normally done through dhcp)
  • tell unitB that unitA is his default gateway
  • tell unitA that "WAN"-router is his default gateway. mostly automaticly via pppoe, etc
  • set the apB device to router mode
  • tell apA that requests to 192.168.168.0/24 will be routed through unitB (static route)
  • unitA automaticly knows that the clientA network in connected to itself

That's it!

[edit] See also