What can be done with an old (second) router?

Question

Computer networks

Hello. There is one router (the same as at the peak (D-link DSL-2640U)). It’s a pity to throw it away, I would like to do something with it, but knowledge in this does not reach the required level. Fluently read that you can make a proxy server, local network or repeater out of it. I would like to have something from the list in descending order. The question is more about the capabilities of the router. I would not mind personally chewing manuals and materiel (if you give parting words). I will also be very grateful for a ready answer. Thanks

Answer 1

throw out

Answer 2

You should start by installing an alternative firmware, for example, OpenWRT.
https://oldwiki.archive.openwrt.org/toh/d-link/dsl...
And there already a lot of opportunities will open up - with a caveat to the limitations of the hardware of this router)

Answer 3

If there are no specific tasks, then it is difficult to invent. I would either make it as a pure AP to the main router, or just switch if there are a lot of wired devices.

Answer 4

Use the case for more worthy projects on arduino.