Ubuntu: remove ipv4-protocol from ethernet interface

On my Ubuntu-host I have my ethernet-interface connected to an mirror-port.
I want to remove the ipv4-protocol from this interface to avoid unnecessary traffic on this interface.

With root-rights execute “nmcli connection show –active”:

ugu5ma nmcli connection show --active
NAME             UUID                                  TYPE      DEVICE          
Fleischele2      8877f4c8-b38d-4028-a71d-b237d8ff649e  wifi      wlp3s0          
br-5bece4d6fbd8  3a34eddc-2c98-4140-9b40-74bcd355cde4  bridge    br-5bece4d6fbd8 
docker0          8de484ba-00e4-4130-b629-0037e3b00015  bridge    docker0         
enp6s0           57bc44f6-5190-42b2-b17f-e928868a42c0  ethernet  enp6s0

my ethernet-interface (enp6s0) has UUID 57bc44f6-5190-42b2-b17f-e928868a42c0.

Let’s remove ipv4 :

ugu5ma nmcli connection modify 57bc44f6-5190-42b2-b17f-e928868a42c0 ipv4.method disabled

Check again:

➜  ugu5ma nmcli connection show --active                                                   
NAME         UUID                                  TYPE  DEVICE 
Fleischele2  8877f4c8-b38d-4028-a71d-b237d8ff649e  wifi  wlp3s0

done!

Pi-hole: send pihole.log and pihole-FTL.log to external Syslog-server

The option to send Pihole-logs to a remote syslogserver is not implemented.
Good thing is that Pi-hole creates log-files.
How about adding these logfiles to the local (R-)Syslog-daemon and send it over to the external Syslog-Server via port 514 TCP/UDP ?

I use Dietpi as the OS on my Raspi3+ and added Pi-hole as one of the supported apps .

Dietpi has per default noSyslog-daemon activated.
The first step is to install a Syslog-daemon, in my case Rsyslog.
Install with root-privileges (sudo su):

apt install rsyslog

cd to /etc/rsyslog.d and create two files:

nano pihole.conf

$InputFileName /var/log/pihole.log
$InputFileTag pihole
$InputRunFileMonitor
$InputFilePersistStateInterval 1000
nano piholeftl.conf

$InputFileName /var/log/pihole-FTL.log
$InputFileTag pihole-ftl
$InputRunFileMonitor
$InputFilePersistStateInterval 1000

as next alter rsyslog.conf and add the following lines

nano /etc/rsyslog.conf

$ModLoad imfile
$InputFileName /var/log/pihole.log
$InputFileName /var/log/pihole-FTL.log
*.* @10.50.100.5:514

10.50.100.5 is the external Syslog-Server. Dietpi sends now the syslog-information to the Syslog-Server 10.50.100.5 via TCP port 514.
Change the IP 10.50.100.5 to the Syslog-Server IP you want to use.

restart Rsyslog-daemon:

systemctl restart rsyslog

The Syslog-daemon receives now the Pi-hole logs:

Addition: If you want to see also the DNS-queries go to Settings and Enable query logging:

This brings also the DNS content to the external Syslog-Server:

May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: query[A] bier.de from 10.50.100.13
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: forwarded bier.de to 1.0.0.1
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: dnssec-query[DS] bier.de to 1.0.0.1
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: reply bier.de is no DS
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: reply bier.de is 212.53.128.75
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: query[AAAA] bier.de from 10.50.100.13
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: forwarded bier.de to 1.0.0.1
May 14 09:58:27 DietPi local0 pihole May 14 09:58:26 dnsmasq[15529]: reply bier.de is NODATA-IPv6

Done!

Mac Network Commands Cheat Sheet

nice CLI-cmd-overview created by JJ can be found at: https://gist.github.com/jjnilton/add1eeeb3a9616f53e4c

fix openhab error: Rule ‘[rulename]’: An error occurred during the script execution: index=0, size=0

My goal is to execute an python-script when the Battery-charge has reached 70%

My rule was not executed, the error as shown above is seen in the log.
My faulty script:

rule "BYD 70"

when
     Item KOSTALPLENTICOREPlus70WithBattery_BatteryCharge received update



then
	var BYDBat = (KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state as Number).floatValue

	if ((KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state as Number).floatValue = 70.0) {


	sendTelegram("bot1",
            "BYD hat > 70  % Ladung " + BYDBat)
	executeCommandLine("python3 /etc/openhab2/scripts/BYDI.py")
	logDebug("logtest", "BYDBat = " + BYDBat)
        logDebug("logtest", "state = " + KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state)
}

end

Reason of the error: the if-statement is misleading, to check if the value is equal it needs two “==”:


	if ((KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state as Number).floatValue == 70.0) {

working-code:

rule "BYD 70"

when
     Item KOSTALPLENTICOREPlus70WithBattery_BatteryCharge received update



then
	var BYDBat = (KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state as Number).floatValue

	if ((KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state as Number).floatValue == 70.0) {


	sendTelegram("bot1",
            "BYD hat > 70  % Ladung " + BYDBat)
	executeCommandLine("python3 /etc/openhab2/scripts/BYDI.py")
	logDebug("logtest", "BYDBat = " + BYDBat)
        logDebug("logtest", "state = " + KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state)
}

end

to debug BYDBat/KOSTALPLENTICOREPlus70WithBattery_BatteryCharge.state debugging needs to be enabled like shown at: https://www.cipv6.de/worp/index.php/2019/10/23/how-do-i-debug-tradfri-on-openhab/

openhab> log:get org.eclipse.smarthome.model.script
DEBUG
openhab> log:set Info org.eclipse.smarthome.model.script
openhab> log:get org.eclipse.smarthome.model.script
INFO