Hi,
I have a strange problem: my pfsense machine based on pc it's wired to ups mustek 600 usb, it's working but when power is off from outlet and pc is working with power from ups-battery is working untill power is up from outlet in that moment on lan interface i got limited or no connectivity

in that shot time when power is back and ups is changing from battery to 220v outlet....i got that, pfsense is not answering anymore....
Ups is wired with management on serial with nut package.
Thanks