Getting Accurate File Versions

November 17, 2015

Rohn's Blog

I used to think that getting a file version in PowerShell was a fairly simple process:


PS> (Get-Item c:windowssystem32mshtml.dll).VersionInfo.FileVersion
11.00.9600.16410 (winblue_gdr.130923-1706)

There are two issues with that method, though:
1. That property can contain text along with the version
2. It turns out that in Windows Vista and higher, that property might not be coming from the file you think it is.

Issue #1 just means that the property is only good if you’re visually checking the version, or if no comparisons with other versions are necessary.

Issue #2 is the big one for me. What appears to be going on is that the FileVersion string is considered a non-fixed part of the version information, and it is pulled from the MUI resource file (if one exists). This file contains the language specific settings, and it looks like it only gets updated when the major or minor file version of…

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Creating DNS records

November 5, 2015

Richard Siddaway's Blog

Following on from my previous post about creating a reverse lookup zone in DNS here’s a function to create records in that zone.

The function takes an IP address and name (of host) and uses Add-DnsServerResourceRecordA to add the record to the forward lookup zone – I use my default AD zone.

The function then splits the IP address. Uses the last octet for the name in the reverse record. Creates the reverse lookup zone from the first 3 octets – notice how the range parameter is used in a decreasing way to specify the order of the octets – to create the reverse lookup zone. The host name and zone are used to create the FQDN of the host.

Add-DnsServerResourceRecordPtr is used to create the reverse (PTR) record.

function new-dnsrecord {
[CmdletBinding()]
param (
[string]$name,
[string]$ipaddress,
[string]$zone = ‘Manticore.org’
)

Add-DnsServerResourceRecordA -Name $name -ZoneName $zone -AllowUpdateAny -IPv4Address $ipaddress

$octs…

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