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fstorer's avatar
fstorer
Brass Contributor
Feb 09, 2020

Retrieving information from multiple Access Points via PowerShell

Hello everyone!   I am doing a WiFi site survey and I would need to retrieve some information from all the Access Points installed in our school (around 136). I wonder if it would be feasible to wr...
Windows PowerShell
fstorer's avatar
fstorer
Brass Contributor
Feb 25, 2020

DearErick A. Moreno R.

 

Thank you so much for your kind reply and apologies for replying so late, I was off for a few weeks... I have tried your script, I am able to start a SSH session with the AP (I can see the SessionID and that the connection is working), but the output of the commands is always empty. When I try to run the single commands, I got something like this:

 

Host : 192.168.x.x
Output : {}
ExitStatus : 255

 

For example, I tried to run the following commands:

Invoke-SSHCommand -SessionId 0 -Command "show interface"

Invoke-SSHCommand -SessionId 0 -Command "show ssid"

In both cases, I got the results above.

I see that the ExitStatus is returning a 255 error code, but I can't understand why.

 

When running those commands on the AP, I get tables with multiple columns (Name/MAC addr/Mode/State/Chan/VLAN/Radio/Hive/SSID) and a list of MAC addresses/SSIDs.

 

Any suggestions?

 

 

 

 

 

 

 

 

 

Erick A. Moreno R.'s avatar
Erick A. Moreno R.
Iron Contributor
Feb 25, 2020

fstorer don't worry I understand, I'm glad to help. 

About the error, have you confirmed that the network is ok? I mean the session was established correctly but there could be a timeout so please increase the timeout option to see how it behaves.  Could you try with a single command like help just to see if it is taking the command string correctly?

 

I don't think the format is a problem is should display something as I said in my comment in the script we may need to work on formatting that table. 

 

Regards 

  • fstorer's avatar
    fstorer
    Brass Contributor
    Feb 27, 2020

    Hi Erick A. Moreno R.

     

    I was able to solve my problem thanks to this article: https://github.com/darkoperator/Posh-SSH/issues/146

    Using New-SSHShellStream instead of Invoke-SSHCommand  returned all the results I wanted.

    I need to tweak the final script, but these are the commands I used:

     
    $Credentials = Get-Credential
    $session = New-SSHSession -ComputerName x.x.x.x -Credential $Credentials -AcceptKey
    $SSHStream = New-SSHShellStream -SessionId 0
    $SSHStream.WriteLine("show interface")
    $SSHStream.read()
     
    I hope this may be of some help!
    Thanks again for your help, I really appreciate that! And thanks to the creator of "Posh-SSH" module!
    • Erick A. Moreno R.'s avatar
      Erick A. Moreno R.
      Iron Contributor
      Feb 27, 2020

      fstorer Awesome, thanks for the update. So we need to push commands that way whenever the command has params, good to know. 

       

      Regards

      Erick

      • fstorer's avatar
        fstorer
        Brass Contributor
        Mar 02, 2020

        Dear Erick A. Moreno R. 

         

        Unfortunately, I am still having issues with the output...

        I want to send the output of the "$SSHStream.read()" to a txt file, but when I run the command:

         

        Out-File -FilePath ".\APInterfaces.txt" -InputObject $SSHStream.read()
         
        I got a blank txt file. 
        Any suggestions?

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