Extract IP all addresses from a text file

extract_IP_addresses.ps1

# Credit to http://www.gfi.com/blog/windows-powershell-extracting-strings-using-regular-expressions/
$input_path = 'c:\ps\ip_addresses.txt'
$regex = '\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b'
select-string -Path $input_path -Pattern $regex -AllMatches | % { $_.Matches } | % { $_.Value }