Not detecting devices in other VLAN (Unifi)

[BenDavidson90]

``Hi,
I installed NetAlertX via docker on an Unraid server (IP 10.0.1.9) and set the network type to host (otherwise it does not see anything).
The problem is that it only sees the devices of the 10.0.1.0 VLAN.

Here is my Unifi config:

Here is my NetAlertX config:

I chose br0 because it seems to be the good interface:

I tested to do some arp-scan via the container.
The same VLAN works:

#  arp-scan 10.0.1.0/24 --interface=br0
Interface: br0, type: EN10MB, MAC: 48:21:0b:36:e4:2e, IPv4: 10.0.1.9
Starting arp-scan 1.10.0 with 256 hosts (https://github.com/royhills/arp-scan)
10.0.1.1        e2:63:da:20:0a:da       (Unknown: locally administered)
10.0.1.2        90:09:d0:32:07:bd       Synology Incorporated
10.0.1.6        52:54:00:4f:1f:48       QEMU
10.0.1.126      52:54:00:15:08:90       QEMU

24 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.10.0: 256 hosts scanned in 1.861 seconds (137.56 hosts/sec). 4 responded

But the other don't:

#  arp-scan 10.0.2.0/24 --interface=br0
Interface: br0, type: EN10MB, MAC: 48:21:0b:36:e4:2e, IPv4: 10.0.1.9
Starting arp-scan 1.10.0 with 256 hosts (https://github.com/royhills/arp-scan)

218 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.10.0: 256 hosts scanned in 1.879 seconds (136.24 hosts/sec). 0 responded

And tested with the vlan parameter, same thing:

#  arp-scan 10.0.2.0/24 --interface=br0 --vlan=3
Interface: br0, type: EN10MB, MAC: 48:21:0b:36:e4:2e, IPv4: 10.0.1.9
Starting arp-scan 1.10.0 with 256 hosts (https://github.com/royhills/arp-scan)

2 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.10.0: 256 hosts scanned in 1.882 seconds (136.03 hosts/sec). 0 responded

I'm pretty sure it's a Unifi problem but I post here because if someone already had this problem and solved it, or if someone has a solution...

Thank !

[jokob-sk]

Hi,

I don't have any segmentation, but I run Unify myself. You could try other scan methods, there is also a Unifi import option:

https://github.com/jokob-sk/NetAlertX/tree/main/front/plugins/unifi_import

I also added an NMAP dev discovery plugin that can be tested in the netalertx-dev image. It might work better than ARP-SCAN, but unsure.

Maybe someone else from the community can help as well.