Network UPS Tools - Can't connect to UPS: Permission Denied

[OttoUsualConsumer]

Hello guys,

I'm new with Linux Mint and I tried connecting my UPS with NUT.
I got everything configured but if I open

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 systemctl status nut-server 

it says:

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Can't connect to UPS [ups] (blazer_usb-ups): Permission denied

Complete output is:

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● nut-server.service - Network UPS Tools - power devices information server
     Loaded: loaded (/lib/systemd/system/nut-server.service; enabled; vendor preset: enabled)
     Active: active (running) since Tue 2022-06-28 23:25:28 CEST; 1min 13s ago
    Process: 3827 ExecStart=/sbin/upsd (code=exited, status=0/SUCCESS)
   Main PID: 3828 (upsd)
      Tasks: 1 (limit: 38294)
     Memory: 524.0K
     CGroup: /system.slice/nut-server.service
             └─3828 /lib/nut/upsd

Jun 28 23:25:28 Rumhau-PC upsd[3827]: listening on 192.168.178.28 port 3493
Jun 28 23:25:28 Rumhau-PC upsd[3827]: listening on 127.0.0.1 port 3493
Jun 28 23:25:28 Rumhau-PC upsd[3827]: listening on 192.168.178.28 port 3493
Jun 28 23:25:28 Rumhau-PC upsd[3827]: listening on 127.0.0.1 port 3493
Jun 28 23:25:28 Rumhau-PC upsd[3827]: Can't connect to UPS [ups] (blazer_usb-ups): Permission denied
Jun 28 23:25:28 Rumhau-PC upsd[3827]: Can't connect to UPS [ups] (blazer_usb-ups): Permission denied
Jun 28 23:25:28 Rumhau-PC upsd[3827]: Can't open /etc/nut/upsd.users: Permission denied
Jun 28 23:25:28 Rumhau-PC upsd[3827]: Can't open /etc/nut/upsd.users: Permission denied
Jun 28 23:25:28 Rumhau-PC upsd[3828]: Startup successful
Jun 28 23:25:28 Rumhau-PC systemd[1]: Started Network UPS Tools - power devices information server.

I don't know why and dont understand why the permission is denied.
I already checked, if nut has permission to the files in /etc/nut, and it has.

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 journalctl -xe 

says:

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 Jun 29 00:01:23 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:28 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:33 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:34 Rumhau-PC kernel: [UFW BLOCK] IN=nordlynx.......
Jun 29 00:01:38 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:39 Rumhau-PC kernel: [UFW BLOCK] IN=nordlynx......
Jun 29 00:01:42 Rumhau-PC kernel: [UFW BLOCK] IN=nordlynx......
Jun 29 00:01:43 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:48 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:53 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:58 Rumhau-PC gnome-terminal-[3010]: g_menu_insert_item: assertion 'G_IS_MENU_ITEM (item)' failed
Jun 29 00:01:58 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:01:59 Rumhau-PC kernel: [UFW BLOCK] IN=nordlynx...... 
Jun 29 00:02:03 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:02:08 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:02:13 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:02:18 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:02:23 Rumhau-PC rtkit-daemon[1362]: Supervising 5 threads of 3 processes of 1 users.
Jun 29 00:02:23 Rumhau-PC rtkit-daemon[1362]: Supervising 5 threads of 3 processes of 1 users.
Jun 29 00:02:23 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
Jun 29 00:02:28 Rumhau-PC upsmon[1329]: Poll UPS [ups@127.0.0.1] failed - Driver not connected
  

(I'm using NordVPN, but disconnecting it also doesn't helped me)

If I start

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 sudo upsdrvctl start 

The output is:

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Network UPS Tools - UPS driver controller 2.7.4
Network UPS Tools - Megatec/Q1 protocol USB driver 0.12 (2.7.4)
Duplicate driver instance detected! Terminating other driver!
Supported UPS detected with megatec protocol
Vendor information unavailable
No values provided for battery high/low voltages in ups.conf

Using 'guestimation' (low: 10.400000, high: 13.000000)!
Battery runtime will not be calculated (runtimecal not set)

so according to my understanding, in principle everything is ok.


Here my config files:

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ups.conf:
user = root
pollinterval = 1
maxretry = 5

[ups]
driver = "blazer_usb"
port = auto
desc="Upsilon 2000"
vendorid = "0001"
productid = "0000"

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upsd.conf
LISTEN 127.0.0.1 3493
LISTEN 192.168.178.28 3493

I'm using Linux Mint 20.3 if relevant.

Hope you can help me!

Thank you in advanced and sorry for my english

[antikythera]

What make and model UPS is it? I only know how to configure APC units for linux but my current one doesn't even need services installing on any computer. It's managed remotely via a secure web portal in the browser. I don't know if your UPS offers a similar facility but it's worth investigating.

Also if you are trying to establish a network connection, what's with the USB references in the driver? Is it a USB to ethernet router connection from the UPS?

[AZgl1800]

Won't help the OP, but my UPS is a CyberPower and 15 years old, it only works with a Windows system, period.

[antikythera]

I had two CyberPower UPS, they lasted 1 year in total and the 2nd was a warranty replacement for the 1st. Glad you have more luck with yours but that's why I ended up going back to APC even though the 1500VA one I needed was stupidly expensive in comparison. I have several other APC UPS, the oldest of which is from 2008 and still works with replacement batteries of course.

[OttoUsualConsumer]

What make and model UPS is it? I only know how to configure APC units for linux but my current one doesn't even need services installing on any computer. It's managed remotely via a secure web portal in the browser. I don't know if your UPS offers a similar facility but it's worth investigating.

Also if you are trying to establish a network connection, what's with the USB references in the driver? Is it a USB to ethernet router connection from the UPS?

Thanks for your reply!
My UPS is a Greencell UPS01LCD.
I'm using it via USB and unfortunately there's no web interface...

The manufacturer delivered it with a Windows application, and it also works there via USB.
I wanted to switch from windows to linux and this is one of my last steps to complete the switch, so I hope we can make it

[OttoUsualConsumer]

okay, I got it fixed now and its fully working.
I'm not sure what actually was the problem. i think some kind of rights that were not given, so nut was not able to read the files and folders.
I recommend looking at this thread and search for "chown" and you'll find the right permissions for these files:
https://wiki.ipfire.org/addons/nut

also you have to add a "ups" user to your system, (I think I read that over).

also I didn't understand there is a configuration for the slaves you don't have to do when you're using your ups only on one system (without slaves).
so I also recommend reading the whole documentation on the nuts site:
https://networkupstools.org/docs/user-m ... 01s02.html

without special uses it's not that long and you understand a bit more how it works, so this is really useful!

and sorry, I'm not sure how to close this thread, you can close it

[AZgl1800]

okay, I got it fixed now and its fully working.
I'm not sure what actually was the problem. i think some kind of rights that were not given, so nut was not able to read the files and folders.
I recommend looking at this thread and search for "chown" and you'll find the right permissions for these files:
https://wiki.ipfire.org/addons/nut

also you have to add a "ups" user to your system, (I think I read that over).

also I didn't understand there is a configuration for the slaves you don't have to do when you're using your ups only on one system (without slaves).
so I also recommend reading the whole documentation on the nuts site:
https://networkupstools.org/docs/user-m ... 01s02.html

without special uses it's not that long and you understand a bit more how it works, so this is really useful!

and sorry, I'm not sure how to close this thread, you can close it

go to the very 1st post you made, and Edit the Title to show [ Solved ]