PowerShell Function: Validate Subnet Mask

Written by Tao Yang

This is a function I wrote couple of days ago for the Windows Build Scripts which I blogged yesterday. I think it is pretty cool so I’d like to blog this function individually:

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It checks the following:

  • – if subnet mask is in numeric and consists 4 sections separated by “.”
  • – If each section is ranged between 0 and 255
  • – convert it to binary format and make sure it is a valid subnet mask (first part consists all “1”s and second part consists all “0”s).

So here’s the usage:

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This function can be downloaded HERE

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