Scan Subnet for Device

› VitalPBX Community Support › General Discussion › Scan Subnet for Device

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    • March 20, 2018 at 3:25 pm
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    stmartinvincent
    Participant

    I try to use the button to scan devices on my subnet, it work but only in the same subnet of my server

    ex:

    -I scan 10.16.48.40/24 it work

    -I scan 10.244.4.0/22 it’s doesn’t work

    Is there something I need to enable to permit VPBX to scan or there something on my network who can block that action?

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    • March 20, 2018 at 3:52 pm
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    stmartinvincent
    Participant

    I know it’s not on the same VLAN so it maybe that who block me?

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    • March 21, 2018 at 4:45 pm
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    Jose Miguel Rivera
    Keymaster
    NI

    What is the output of the Following Command:

    nmap -T4 -sP -n -oN - YOURIP/CIDR
	Ejemplo: 
    nmap -T4 -sP -n -oN - 192.168.20.0/21
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    • March 21, 2018 at 5:32 pm
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    stmartinvincent
    Participant

    Nmap scan report for 10.244.10.11
    Host is up (0.00086s latency).
    Nmap scan report for 10.244.10.12
    Host is up (0.00078s latency).
    Nmap scan report for 10.244.10.21
    Host is up (0.00069s latency).
    # Nmap done at Wed Mar 21 13:31:00 2018 — 1024 IP addresses (145 hosts up) scanned in 8.13 seconds

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    • March 21, 2018 at 5:35 pm
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    Jose Miguel Rivera
    Keymaster
    NI

    Is not detecting any device, you should check the network infrastructure in your company.

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    • March 21, 2018 at 6:10 pm
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    stmartinvincent
    Participant

    Like I said they are not on the same vlan, So Nmap won’t show any MAC.

    If i understand the scan subnet for devise button use the command nmap, so I will never be able to use the button.

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    • March 21, 2018 at 6:18 pm
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    Jose Miguel Rivera
    Keymaster
    NI

    Yes, it use nmap command to discover the devices in the network

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