Rexxer

Some tips for me and other

PFSense + ssh copy + keep authorized_keys after reboot

If you copy keys with: cat id_rsa.pub >> ~/.ssh/authorized_keys they will disappear after reboot. You have to add a key via Web GUI: System – Users – Edit user admin – add authorized keys from id_rsa.pub from your PC below.  

Powershell + string to array

An array is created with the -split operator. Like so, $myString=”Four score and seven years ago” $arr = $myString -split ‘ ‘ $arr # Print output Four score and seven years ago When you need a certain item, use array index to reach it. Mind that index starts from zero. Like so, $arr[2] # 3rd […]

Group policy + Account lockout audit

Found out the strange thing: my script for locked out accounts stopped working after 21 November 2018. I checked eventlog and didn’t see any 4740 events. After investigation I resolved it. It must be turned on there: Computer configuration/Policies/Windows Settings/Security settings/Advanced Audit Policy Configuration/Logon/Logoff/Audit Account Lockout Then I checked it: Auditpol /get /category:*

MDT + Script for joining to a domain

$strUser = “domain\user” $strDomain = “domain.local” $strPassword = ConvertTo-SecureString “password” -AsPlainText -Force $Credentials = New-Object System.Management.Automation.PsCredential $strUser, $strPassword $strOU = “OU=Computers,DC=domainn,DC=local” Add-computer -DomainName $strDomain -Credential $Credentials -OUPath $strOU

MDT + Script for renaming a PC according to his IP

powershell.exe -noprofile -command “Set-ExecutionPolicy Bypass LocalMachine” -force $strPrefix=”WS” # Get IP and make the name $IP=(Get-WmiObject win32_networkadapterconfiguration | Select-Object -Property @{name=’IPAddress’;Expression={($_.IPAddress[0])}} | Where IPAddress -NE $null).IPAddress $a,$b,$c,$d = $IP.split(‘.’) $strComputerName=$strPrefix+$c+”-“+$d # Rename $computer=gwmi Win32_computersystem $computer.rename($strComputerName)

Get text before dot

s=”4.56″ $ echo “${s%%.*}” 4

Exchange 2010 + Re-index DB

Issue: Users can’t find some e-mails with searching The Internet suggest several ways to resolve the issue like: Update-MailboxDatabaseCopy –Identity ‘DB2’ –CatalogOnly or 1. stop the Exchange Search Indexer and Search service 2. go to the location of the mailbox database. 3. there should be a folder called catalog{GUID}. Delete the folder 4. Restart the […]

Exchange 2010 + Powershell + Search and delete specific mail

Task: Find and delete all the e-mail that contains specific attachment. 1. Estimate and debug our query: Get-Mailbox -ResultSize Unlimited | Search-Mailbox -SearchQuery ‘attachment:”My file example*”‘ -TargetMailbox “my.mailbox” -TargetFolder “MyFolder” -Logonly -Loglevel Full | Select DisplayName, ResultItemsCount | where-object {$_.ResultItemsCount -ne “0”} and check the folder for the report or Get-Mailbox -ResultSize Unlimited | Search-Mailbox […]

Unable to do anything with usb-flash after disk imaging

I often do bootable usb-flash-disks with Win32image software. But when you decide to format it with Windows disk management you can face an issue – it can’t be done. All the options are grey out. You can fix it with diskpart – just select this disk and delete all the partitions on it and you […]

PFSense upgrade

Usually upgrade passes without issues but it can be painfull sometimes. I did upgrade from version 2.2.x to 2.4.3 and got a lot of errors about PHP and other modules especially “Tftp-server”. I tried to reboot the server and it was lost. So I went to the place and tried to do something but without […]

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