How can I route traffic from a device through an interface created on the router?

[Kyjiep]

I created an sbtun interface using sing-box on my router RT-AX86U with firmware Merlin 3004.388.7. How can I route traffic from a device with the address 192.168.50.31, which is in the router's network, through this sbtun interface?
Sorry for my English.

 

[ZebMcKayhan]

I created an sbtun interface using sing-box on my router RT-AX86U with firmware Merlin 3004.388.7. How can I route traffic from a device with the address 192.168.50.31, which is in the router's network, through this sbtun interface?
Sorry for my English.

Routes are destination ip based, not source ip based. So if the ips you would like to access via sbtun interface are one or more unique confined ranges you could just add a route in the main route table. All lan could then access these ip/ranges via sbtun interface.

If you plan on accessing I.e internet (all ips) via this interface only from a specific lan ip you will need to setup a new routing table and create ip rules that your lan ip will use only. It gets a tad more messy.

 

[Kyjiep]

Routes are destination ip based, not source ip based. So if the ips you would like to access via sbtun interface are one or more unique confined ranges you could just add a route in the main route table. All lan could then access these ip/ranges via sbtun interface.

If you plan on accessing I.e internet (all ips) via this interface only from a specific lan ip you will need to setup a new routing table and create ip rules that your lan ip will use only. It gets a tad more messy.

Thank you. I already figured this out using ChatGPT, and with its help I even made the corresponding script. It works as I wanted. There are some minor flaws that I couldn't eliminate, but I'm happy with it anyway. Later I will translate the readme into English and upload it here along with the script.