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254 ACTIVE addresses detected by Advanced IP Scanner.

Mikamika -  
brupala Posted messages 111148 Registration date   Status Member Last intervention   -

Hello,

My software finds 254 addresses in ACTIVE, and 0 UNKNOWN and 0 INACTIVE.
What does that mean?

Does it mean my network is infested with people leeching my Wifi???

I only recognize 3 devices, identifiable by their full names. The rest of the addresses start with 192.168...

Please, thank you for helping me.

PS: I installed the NET ANALYZER app on my phone to detect devices connected to the Wifi.

It detects 3, which is OK.

So why are 254 addresses detected on my PC??

I'm stressing out like crazy...

6 answers

  1.
    brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449
     

    Hello,

    You have to believe that your Advanced Ip Scanner is a donkey or a liar.

    Net Analyzer is reliable.

    And there you go ....

    But misery, how annoying the line spacing is !!

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  2. Mikamika
     

    Uh, are you sure that this software is a "donkey" and therefore unreliable?

    Because it seems to be recommended by several websites after all...

    Do other forum users have any opinions on this please? Thank you.

    I tried Advanced IP Scanner on my work PC:

    Several ACTIVE IPs but a hundred UNKNOWN ones.

    Why this difference compared to my home?

    I also specify that using the PowerShell command on my PC, I don't find as many addresses...

    Thanks a lot for helping me, I don't want to be spied on by anyone... :(

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    1. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449
       

      What is this tool for if you don't know how to use it?

      What comes after the 192.168 at your place?

      Looking at the administration interface of your box, you can also see all the machines it recognizes.

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  3. Mikamika
     

    How do we use it then?

    I looked at tutorials on the internet and on sites where it's explained.

    Here for example: https://www.malekal.com/comment-faire-un-scan-ip-reseau-local-lan/

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    1. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449
       

      We use it as explained, but in your case, there must be something causing it to respond incorrectly and that you can't analyze the fault.

      What are the unknown MAC addresses and what are the complete IP addresses?

      The IP addresses are private, so inaccessible from the internet; please provide a screenshot of your results.

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  4. Mikamika
     

    I called my ISP, who changed my Wifi password.

    Since then, I ran a scan again and the result is as follows:

    The 252 IP addresses listed as Unknown were all ACTIVE last night.

    I unfortunately did not take a screenshot of my first scan...

    The unknown IP addresses were consecutive, from 1 to 255, and are now categorized as UNKNOWN.

    I performed the same scan again: I open A.IP.S, click on "run", then "Scan". That’s it.

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    1. Pierrecastor Posted messages 10830 Registration date   Status Moderator Last intervention   4 215
       

      Hello,

      I don't know what it was about, but it was probably a bug. 254 is exactly the total number of possible IPs on your local network.

      And no one can be assigned the address 192.168.x.255 which is reserved for broadcast.

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      1. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449 > Pierrecastor Posted messages 10830 Registration date   Status Moderator Last intervention  
         

        One must be correct and generalize:

        192.168.0.255 is a broadcast on 192.168.0.0/24 but is completely legitimate and usable on 192.168.0.0/23, just like 192.168.1.0, so we cannot assert it this way if we want to be precise.

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      2. Pierrecastor Posted messages 10830 Registration date   Status Moderator Last intervention   4 215 > brupala Posted messages 111148 Registration date   Status Member Last intervention  
         

        Thank you for the clarification. I assumed that on the local networks of the boxes I know, the default subnet mask is always /24.

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      3. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449 > Pierrecastor Posted messages 10830 Registration date   Status Moderator Last intervention  
         

        It's true that most boxes only allow configuring /24 LANs (in IPv4), but a properly functioning router allows for other network sizes (larger or smaller).

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  6. mikamika
     

    And now I have this.

    My PC is displayed twice but not with the same manufacturer, and my phone is inactive.

    Where does it come from and why is my PC displayed twice????

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    1. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449
       

      There's no need to hide your IP addresses; they are private addresses, inaccessible from the internet.

      For your PC, does it have only one connection or both Ethernet and Wi-Fi?

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  7. Mikamika
     

    OK. I don't know anything about it, so I'm doing it like this.

    I was on Ethernet without Wifi for a test at home.

    It must come from there...

    But that doesn't explain why the addresses in UNKNOWN were in ACTIVE yesterday.

    I haven't touched anything since, except for the call to my ISP...

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    1. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449
       

      Don't you know how to change your Wi-Fi box's WPA key by yourself?

      I told you: trust Net Analyzer, the only thing is that you can't configure the range, so it scans outside the local network; however, it does see devices in IPv6, unlike Advanced IP Scanner, which completely ignores this protocol.

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      1. Mikamika > brupala Posted messages 111148 Registration date   Status Member Last intervention  
         

        If it's good.

        Okay, thank you.

        I have one last question: Can malware/virus/Trojan spread from one device to another using the Wifi network of an internet box?

        I looked but couldn't find an article on the subject.

        Thank you in advance.

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      2. brupala Posted messages 111148 Registration date   Status Member Last intervention   14 449 > Mikamika
         

        A virus can spread over Wi-Fi just like on an Ethernet network and all other networks; however, it cannot connect a machine to a protected Wi-Fi network on its own if it is not authorized on it.

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      3. Mikamika > brupala Posted messages 111148 Registration date   Status Member Last intervention  
         

        Okay,

        So does that mean a virus can transfer from my old iPhone to my Android?

        Or from my PC to my Android?

        And vice versa?

        I'm asking because I found malware on my PC (which was detected and removed). And my iPhone 6, which I haven't used for 2 months, hasn't accepted system updates and some apps for a long time.

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