Nut upsuser - Oct 2023 - URL upsstats.cgi DOES not show UPS

Hey the NUT sever (http://192.168.0.29/) was working fine and the
URL?http://192.168.0.29/cgi-bin/nut/upsstats.cgi?did show me all the UPS slaves
- but all of a sudden one particular slave is not showing up.....The one that is
not showing up IP is?192.168.0.20 and the following command in NUT server
upsc upshpomv at 192.168.0.20

Does respond with?
Init SSL without certificate databasebattery.charge: 100battery.charge.low:
10battery.charge.warning: 20battery.mfr.date: CPSbattery.runtime:
3270battery.runtime.low: 300battery.type: PbAcidbattery.voltage:
24.0battery.voltage.nominal: 24device.mfr: CPSdevice.model:
CP1350PFCLCDdevice.serial: 000000000000device.type: upsdriver.name:
usbhid-upsdriver.parameter.pollfreq: 30driver.parameter.pollinterval:
15driver.parameter.port: autodriver.parameter.synchronous: nodriver.version:
2.7.4driver.version.data: CyberPower HID 0.4driver.version.internal:
0.41input.transfer.high: 139input.transfer.low: 88input.voltage:
117.0input.voltage.nominal: 120output.voltage: 141.0ups.beeper.status:
enabledups.delay.shutdown: 20ups.delay.start: 30ups.load: 12ups.mfr:
CPSups.model: CP1350PFCLCDups.productid: 0501ups.realpower.nominal:
810ups.serial: 000000000000ups.status: OLups.test.result: No test
initiatedups.timer.shutdown: -60ups.timer.start: -60ups.vendorid: 0764

Hence I know the slave does respond to server but why is it now showing in
the?http://192.168.0.29/cgi-bin/nut/upsstats.cgi? - BTW I have not made ANY
changes to hosts.conf in my server. Any idea how to troubleshoot?
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Well... one troubleshooting idea is to use a sniffer (ngrep, tcpdump, etc.)
to see the dialogue between the web server and upsd data server (
192.168.0.20:3493), to check if anything looks fishy there. Maybe some
firewalls, SELinux after an update, etc. tempered up and there is no
network chatter from http context to outside unless allowed (`setenforce 0`
can help quickly confirm or rule out involvement of SELinux).

Another idea is to hack around `drivers/upsstatus.c` to add debug messages
around connections (at least `fprintf(stderr...)` but if this matures to
become a PR - then ideally `upsdebugx` and some way to pass debug verbosity
into the program - e.g. config file).

On Tue, Oct 10, 2023 at 9:03?PM S K via Nut-upsuser <
nut-upsuser at alioth-lists.debian.net> wrote:
> Hey the NUT sever (http://192.168.0.29/) was working fine and the URL
> http://192.168.0.29/cgi-bin/nut/upsstats.cgi did show me all the UPS
> slaves - but all of a sudden one particular slave is not showing up.....The
> one that is not showing up IP is 192.168.0.20 and the following command
> in NUT server
>
> upsc upshpomv at 192.168.0.20
>
> Does respond with
>
> Init SSL without certificate database
> battery.charge: 100
> battery.charge.low: 10
> battery.charge.warning: 20
> battery.mfr.date: CPS
> battery.runtime: 3270
> battery.runtime.low: 300
> battery.type: PbAcid
> battery.voltage: 24.0
> battery.voltage.nominal: 24
> device.mfr: CPS
> device.model: CP1350PFCLCD
> device.serial: 000000000000
> device.type: ups
> driver.name: usbhid-ups
> driver.parameter.pollfreq: 30
> driver.parameter.pollinterval: 15
> driver.parameter.port: auto
> driver.parameter.synchronous: no
> driver.version: 2.7.4
> driver.version.data: CyberPower HID 0.4
> driver.version.internal: 0.41
> input.transfer.high: 139
> input.transfer.low: 88
> input.voltage: 117.0
> input.voltage.nominal: 120
> output.voltage: 141.0
> ups.beeper.status: enabled
> ups.delay.shutdown: 20
> ups.delay.start: 30
> ups.load: 12
> ups.mfr: CPS
> ups.model: CP1350PFCLCD
> ups.productid: 0501
> ups.realpower.nominal: 810
> ups.serial: 000000000000
> ups.status: OL
> ups.test.result: No test initiated
> ups.timer.shutdown: -60
> ups.timer.start: -60
> ups.vendorid: 0764
>
>
> Hence I know the slave does respond to server but why is it now showing in
> the http://192.168.0.29/cgi-bin/nut/upsstats.cgi  - BTW I have not made
> ANY changes to hosts.conf in my server. Any idea how to troubleshoot?
>
> _______________________________________________
> Nut-upsuser mailing list
> Nut-upsuser at alioth-lists.debian.net
> https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser
>
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