Due to increased risk of exposed router in public area that ppl can access and use manufacture reset button to reset to default password printed on physical router, I have an idea of enclosing router in a Dell legacy slim case as a security box which has a legacy IO shield to feed coax cable,  Ethernet cable and power adapter through PS/2 and serial port opening

The case removable side panel  has a 6 mm diameter security latch hole that can be secured using a combination lock of 4-5 mm U shackle.

I was c/f metal case enclosure of router diminishing WiFi signal strength but on testing 2.4 GHz now no such issue