Removed devices are added again on the next scan after removing

[AlbertCaro]

I had the same problem as issue #15, and I follow those solution adding parameter SCAN_SUBNETS='192.168.100.0/24' on my pialert.conf

Well I started to remove those devices from Docker networks and other that doesn't interest to me, after remove someones the next scan ended adding those same amount of devices again.

Theres a video of the issue on YouTube: https://www.youtube.com/watch?v=7-jshMSbBk0

In that video I start to delete devices, and in the minute 3:12 our bug appears.

If it helps, my pialert.conf looks like this:

#-------------------------------------------------------------------------------
#  Pi.Alert
#  Open Source Network Guard / WIFI & LAN intrusion detector 
#
#  pialert.conf - Back module. Configuration file
#-------------------------------------------------------------------------------
#  Puche 2021        pi.alert.application@gmail.com        GNU GPLv3
#-------------------------------------------------------------------------------

PIALERT_PATH      = '/home/pi/pialert'
DB_PATH           = PIALERT_PATH + '/db/pialert.db'
LOG_PATH          = PIALERT_PATH + '/log'
VENDORS_DB        = '/usr/share/arp-scan/ieee-oui.txt'
PRINT_LOG         = False

SMTP_SERVER       = 'smtp.gmail.com'
SMTP_PORT         = 587
SMTP_USER         = 'example@gmail.com'
SMTP_PASS         = ''

REPORT_MAIL       = True
REPORT_FROM       = 'Pi.Alert <' + SMTP_USER +'>'
REPORT_TO         = 'example@gmail.com'
REPORT_DEVICE_URL = 'http://caronavarro.pi/pialert/deviceDetails.php?mac='

# QUERY_MYIP_SERVER = 'https://diagnostic.opendns.com/myip'
QUERY_MYIP_SERVER = 'http://ipv4.icanhazip.com'
DDNS_ACTIVE       = False
DDNS_DOMAIN       = 'your_domain.freeddns.org'
DDNS_USER         = 'dynu_user'
DDNS_PASSWORD     = 'A0000000B0000000C0000000D0000000'
DDNS_UPDATE_URL   = 'https://api.dynu.com/nic/update?'

PIHOLE_ACTIVE     = True
PIHOLE_DB         = '/etc/pihole/pihole-FTL.db'
DHCP_ACTIVE       = True
DHCP_LEASES       = '/etc/pihole/dhcp.leases'

# arp-scan options & samples
#
# Scan local network (default)
# SCAN_SUBNETS    = '--localnet'
#
# Scan two subnets
# SCAN_SUBNETS    = '192.168.11.0/24 192.168.144.0/24'
#
# Scan using interface eth0
# SCAN_SUBNETS    = '--localnet --interface=eth0'

SCAN_SUBNETS      = '192.168.100.0/24'

I would greatly appreciate your help

[AlbertCaro]

Finally, I found the solution about this issue:

PiHole's integration that uses the pihole FTL database ignores que subnets filter, getting the list of all the devices that have used the DNS, set PIHOLE_ACTIVE as False if you have the same issue.