WAN/Routing responsive, SSH/WiFi/Luci unresponsive

Hi everyone,

I have cobbled together a router of sorts using a 2GB Pi4, unmanaged switch, powered USB hub, a USB3 MT7612U based wireless adapter and a 3D printed enclosure to keep everything tidy.

Everything is fine for a while and at some point (seems to be in the 24-48 hr range), things stop responding, but not everything. When this happens, my other router (configured as a simple AP) still has internet connectivity via the OpenWRT solution, so it is still working. However, WiFi is no longer broadcasting from the OpenWRT solution and I am unable to access Luci or log in via SSH. I have run SSH with -vvv and I get:

root@'s password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
Permission denied, please try again.
root@'s password:

Upon rebooting the OpenWRT router, everything comes back as expected, but that isn't really an acceptable long-term solution!

I know that's not much to go on, but was wondering if anyone out there had any ideas/suggestions I could try before I have to reboot again.



USB WLAN is typically the weakest point here (those cards and chipsets are not meant for AP mode or 24/7 operations), I'd first rule out that as a potential cause of problems (by disconnecting it completely).


Thanks - I'll give it a go. Unfortunately, I had to rebuild the entire system as when I rebooted it after it occurring again overnight, it wouldn't boot correctly. I couldn't even get a USB keyboard to work, despite the screen output telling me that it had been successfully registered.