Hi, On my FreeBSD box which is connected to the UPS I have the following configuration (config not shown is left as default): ups.conf [apc] driver = "usbhid-ups" # alternately: port = "auto" vendorid = "051D" productid = "0003" product = "Smart-UPS X 2200 FW:UPS 07.4 / ID=01003" serial = "AS2039254737" vendor = "American Power Conversion" # bus = "000" # device = "002" # busport = "013" upsd.conf LISTEN 192.168.123.4 3493 upsd.users [upsprimary] password = ***** upsmon primary [upssecondary] password ***** upsmon secondary upsmon.conf MONITOR apc at 192.168.123.4 1 upsprimary ***** primary And I can see all the processes running: # ps -xa | grep -e ups -e nut 66945 - Is 0:00.00 /usr/local/bin/upslog -s myups at localhost -l /var/log/nut/ups.log -i 300 66960 - Is 0:00.00 /usr/local/sbin/upsmon localhost 66961 - S 0:00.03 /usr/local/sbin/upsmon localhost 67166 - Ss 0:00.09 /usr/local/libexec/nut/usbhid-ups -a apc 67168 - Ss 0:00.06 /usr/local/sbin/upsd And I can query the ups (Oddly with no need to use a username and password): # upsc apc at 192.168.123.4 battery.charge: 100 battery.charge.low: 10 battery.charge.warning: 50 battery.runtime: 5655 battery.runtime.low: 120 battery.type: PbAc battery.voltage: 132.0 battery.voltage.nominal: 120.0 device.mfr: American Power Conversion device.model: Smart-UPS X 2200 device.serial: AS2039254737 device.type: ups driver.debug: 0 driver.flag.allow_killpower: 0 driver.name: usbhid-ups driver.parameter.pollfreq: 30 driver.parameter.pollinterval: 2 driver.parameter.port: auto driver.parameter.product: Smart-UPS X 2200 FW:UPS 07.4 / ID=01003 driver.parameter.productid: 0003 driver.parameter.serial: AS2039254737 driver.parameter.synchronous: auto driver.parameter.vendor: American Power Conversion driver.parameter.vendorid: 051D driver.state: quiet driver.version: 2.8.2 driver.version.data: APC HID 0.100 driver.version.internal: 0.53 driver.version.usb: libusb-1.0.0 (API: 0x1000102) ups.beeper.status: enabled ups.delay.shutdown: 20 ups.firmware: UPS 07.4 / ID=01003 ups.mfr: American Power Conversion ups.mfr.date: 2020/09/27 ups.model: Smart-UPS X 2200 ups.productid: 0003 ups.serial: AS2039254737 ups.status: OL ups.timer.reboot: -1 ups.timer.shutdown: -1 ups.vendorid: 051d On a linux box I have: upsmon.conf MONITOR apc at 192.168.123.4 1 upssecondary ***** slave And can query the ups (Again with no need to supply the username and password): # upsc apc at 192.168.123.4 ups.status OL When I start upsmon I see the following logging: Feb 11 12:57:42 buildsever01 upsmon[17519]: Startup successful Feb 11 12:57:42 buildsever01 upsmon[17520]: Login on UPS [apc at 192.168.123.4] failed - got [ERR ACCESS-DENIED] Feb 11 13:05:28 buildsever01 upsmon[17520]: Poll UPS [apc at 192.168.123.4] failed - Server disconnected Feb 11 13:05:28 buildsever01 upsmon[17520]: Communications with UPS apc at 192.168.123.4 lost Feb 11 13:05:33 buildsever01 upsmon[17520]: Communications with UPS apc at 192.168.123.4 established On a OpenBSD box I have: upsmon.conf MONITOR apc at 192.168.123.4 1 upssecondary ***** secondary And when I start upsmon I see the following: # upsmon -F Network UPS Tools upsmon 2.8.2 kill: No such process UPS: apc at 192.168.123.4 (secondary) (power value 1) Using power down flag file /etc/killpower upsnotify: failed to notify about state 2: no notification tech defined, will not spam more about it (After initial testing I've started upsmon on this machine via rcctl enable upsmon && rcctl start upsmon.) Is that it?? Is it all working? If I go and pull the power cable out of the UPS these three machine should shut down once the battery reaches a critical level based on the following? battery.charge.low: 10 battery.charge.warning: 50 These servers are in a air conditioned rack. The air conditioning is not plugged into a UPS (Don't ask) so ideally as soon as the UPS reports its state as on batteries nut should shut these servers down. I've seen that the levels can be overridden... override.battery.charge.low = 10 override.battery.charge.warning = 50 So maybe I could set warning to 95 and low to 90? Also is it possible to use nut to shut the servers down if the temp in the rack goes above some value? I don't see the UPS reporting the temp though. Thanks