SSH connection stops working after ~12h to Asus RT-AX86U -router

[Pena]

SSH works as it should for approximately 12h which after the router gives me "kex_exchange_identification: read: Connection reset by peer". When I change any setting in the router via the WebGUI and press apply, SSH works again for 12h. The SSH timeout is set to 0 (disabled). There seems to be something that timeouts the SSH and resets on setting changes.
Is there any fix for this issue? Or can I set some automatic script that changes a setting every 12h so that SSH keeps working continuously?

I have the Asuswrt integration in Home Assistant which require continuous SSH connection.

Router: Asus RT-AX86U
Firmware: Asuswrt Merlin 388.1

 

[RMerlin]

Make sure you don`t have something constantly hammering the SSH port with invalid credentials, causing that IP to get blocked.

 

[Pena]

Make sure you don`t have something constantly hammering the SSH port with invalid credentials, causing that IP to get blocked.

That shouldn't be an issue, because after the 12h window I can't access the router via SSH with any device.

 

[drinkingbird]

That shouldn't be an issue, because after the 12h window I can't access the router via SSH with any device.

Are you attempting to stay connected constantly for 12 hours?

 

[Pena]

Are you attempting to stay connected constantly for 12 hours?

I recognized the issue with Home Assistant Asuswrt integration. I don't know if it is constantly connected.

 

[drinkingbird]

I recognized the issue with Home Assistant Asuswrt integration. I don't know if it is constantly connected.

If it is staying connected constantly there may be either a memory leak or a security feature that is killing it. If it is exactly 12 hours I would guess maybe key rollover or just a time limit. Create a script to bounce the ssh daemon every 11 hours or so and you should be good (assuming home assistant can auto reconnect).

 

[Pena]

If it is staying connected constantly there may be either a memory leak or a security feature that is killing it. If it is exactly 12 hours I would guess maybe key rollover or just a time limit. Create a script to bounce the ssh daemon every 11 hours or so and you should be good (assuming home assistant can auto reconnect).

How do I do that?