Arp-Scan not running after first install

[Vorteth]

The installation goes as expected and arp-scan works.

How past install if I power off a device or power on one and look at it in particular it will not update.

The scan countdown goes from 0 to 4:60 immediately and doesn't seem to scan.

I've tried:

1. Updating permissions using the cli to the home profile
2. Uninstalling and autopurging arp-scan for a fresh install. Even with this fresh install and no other modifications it just doesn't run.

Any thoughts? I love this product but currently it doesn't seem to see changes.

[Vorteth]

The scan log never changes from this as well:

[leiweibau]

The scan countdown goes from 0 to 4:60 immediately and doesn't seem to scan.

You've noticed that correctly, because the scan starts at 0 (when you refresh the page, the scan status should say "1 scan(s)...") and the countdown counts down again from 5 minutes when the next scan starts. Or to put it another way: The coutdown should only help to estimate when the next scan will start, it is not live monitoring.

The scan log never changes from this as well:

Because once the page is generated, it no longer changes automatically. Your screenshot shows that a scan is apparently currently running because the log has just been deleted by the scan. At this point, however, the page has remembered that the log is currently empty. Simply refresh the settings page after 2-3 minutes and check that the scan status shows a 0 (Not the Countdown, a 0 at the beginning) again. Then the log should also be visible.

[Vorteth]

This is still like this after hours. Refreshing when it hits the 5 minute mark just has the same count down and never changes from 0 scans running.

It's like it can't access arp scan.

[leiweibau]

As which user have you installed pialert on which system?

[Vorteth]

I installed it as my default user, named 'pi', if the install log file would be helpful I can send that along.

I copied your install.sh script exactly as from git.

[leiweibau]

What is the Output of this command? python3 $HOME/pialert/back/pialert.py 1

[Vorteth]

See attached photo, it works and also flags the unit as offline which is my 'test' unit to see if it's working.

[Vorteth]

I just powered on the device in question, waiting for the timer to hit 0

[Vorteth]

After it hit 0 it continued to count down from 5 minutes, no scan in progress and unit offline in the database.

I ran your python text again and it noticed the unit as online.

[leiweibau]

Okay. Everything is Fine. The scan starts. When the countdown starts again at 5 min and you refresh the page, the status box on the Settings page should say something like

Scan Status 1 scan(s) currently running

[Vorteth]

Unfortunately that doesn't happen.

Is it possible something in cron is broken?

[Vorteth]

It won't let me upload the video, however you can see it in this link: https://photos.app.goo.gl/KHRo66DGTKEUT3pb7

[Vorteth]

Let me know and I can try to capture a shorter time the link doesn't work for you.

[Vorteth]

It sounds like as a work around I could however cron this scan, I imagine that's not a good idea however since that may conflict if it ever starts working?

[leiweibau]

Okay, i see 🤔 Can you please run

cd $HOME/pialert/back
sudo ./pialert-cli set_sudoers

[leiweibau]

Can you show me your user cron? crontab -l

[Vorteth]

Crontab below, working on the other two:

[Vorteth]

Set sudoers

[Vorteth]

Waiting for the next scan to time down.

[Vorteth]

You didn't ask but in case it's relevant

[leiweibau]

This cron is totally broken

0 3 * * 1      python3 $HOME/pialert/back/pialert.py update_vendors >$HOME/pialert/log/pialert.vendors.log  2>&1
*/3 * * * *    python3 $HOME/pialert/back/pialert.py internet_IP    >$HOME/pialert/log/pialert.IP.log       2>&1
*/5 * * * *    python3 $HOME/pialert/back/pialert.py 1              >$HOME/pialert/log/pialert.1.log        2>&1
0 2 * * */4    python3 $HOME/pialert/back/pialert.py cleanup        >$HOME/pialert/log/pialert.cleanup.log  2>&1

remove

15* "/home/pi/pialert/back/pialert-cli" reporting_test
15 0 15 * * "/home/pi/pialert/back/pialert-cli" reporting_test
# Testing to ensure 
#20 * * * * "/home/pi/pialert/back/pialert-cli" reporting_test
* 

[Vorteth]

I added the reporting tests myself so it checks the notifications every two weeks even if an event didn't happen, that's not possible? Or you think that just tripped up the script to add the cron data?

[Vorteth]

Applied cron lines you added and rebooted. Should I remove the reporting ones I made?

[leiweibau]

Okay, you can leave it in if you want. But the lines from me have to go in. A restart is not necessary

[Vorteth]

Waiting for the next window to auto start.

[Vorteth]

AHHH HAH, it is running now.

However the interface seems to be 'disconnected', it never says '1 scan in progress' it always says 0, however I can confirm it's outputting to the log.

Would removing the cron items and doing a clean install perhaps fix this?

[leiweibau]

Once it's up and running, leave it at that for the time being. I will check the source code again in the next few days.

[Vorteth]

You got it, I won't reinstall and will leave it as is. THANK YOU VERY MUCH!!!

Did you want me to leave this open or close it out?

[leiweibau]

I will close it, after i checked the code.

[leiweibau]

The process counter was tested both with $HOME and with "~" in the crontab. The fix will come with the next update

[Vorteth]

Cool, thank you!