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Do "home grade" wifi routers route traffic reaching the "WAN" interface (destination IP subnet matching the LAN subnet) to the LAN side?

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Alarming-Historian41@alien.topB
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https://preview.redd.it/qhwgvwst8t1c1.png?width=1514&format=png&auto=webp&s=d847f9b41c99812367d02b438c396adfa981ddaf

I have the setup depicted above:

  • Two ISPs. (WIFI disabled in both routers
  • Intermediate router: provides load balancing and fault tolerance.
  • The innermost router: provides Internet via wifi and ethernet to my home network.
  • The intermediate router can provide status and info via webhooks
  • I decided to implement a simple web app to consume the webhook calls and put it in a host located in the 192.168.3.0/24 subnet.
  • I configured my app endpoint in the router configuration (of course specifying the 192.168.3.0/24

IP, let’s say http://192.168.3.67/draytek-wh-implementation)

  • I configured a static route in the intermediate router so packets with dst IP 192.168.3.0/24 go through the right iface (I configured the gateway as 192.168.1.2 as well)
  • Nothing was received by 192.168.3.67
  • I suspect that home-grade routers like the one I have (Linksys EA9300) can do this kind of routing.

Am I right? Thank you so much for any help!

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BTW: to make it work I had to settle for using port forwarding

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Sportiness6@alien.topB
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This looks unnecessarily complex. Just out of curiosity why did you do things this way, rather than get a prosumer/small business router option like unifi, mikrotik or Pfsense?

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