Richard Parmiter

Virtualisation blog and Knowledge Base

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Impersonate other browsers with Chrome

Posted on February 16th, 2012

When testing access scenarios it is useful to impersonate other browers such as Safari or Mobile Safari from a Windows PC. This can be done with Chrome using the following syntax when launching the app. This example impersonates the mobile safari browser on an iPhone.

chrome.exe –user-agent=”Mozilla/5.0 (iPhone; U; CPU like Mac OS X; en) AppleWebKit/420+ (KHTML, like Gecko) Version/3.0 Mobile/1A543 Safari/419.3″

There are many “user-agent” strings that can be added to this syntax and a google search should discover the correct one required.

This is particularly useful if testing Netscaler configurations where different web pages appear for different browser types.

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Using Settings.sol to set Adobe Flash Settings

Posted on March 21st, 2010

When using Adobe Flash to access old content that was coded on previous versions, a message can appear stating that Flash has stopped a potentially unsafe operation. This message could also appear for content running from network shares. The message will be similar to:

If you select the ‘settings’ options the web based Adobe Global Setting panel appears. This actually connects via the internet to a site.

It seems strange that you must connect to an external web site to change settings for a locally installed version of flash – hopefully Adobe will remove this nonsense in the future and release an adm template or something instead. Anyway, each client can set options within this Global Security Settings screen. In this can either the “always allow” option can be selected or a location can be added to the trust list.

Select to Edit Locations | Add location and paste in the value prompted by the gui as this is what was just denied. Or add any other location you want to trust:

Close this web site, relaunch the content and it should now work as expected and display the content without the pop-up warning message.

However, in a situation where multiple clients need to run this content it is inconvenient to ask the users to set this themselves or manually set it on thousands of desktops.

Instead the settings.sol file can be used.

Any of the settings chosen from the web page GUI will be set in the following file (for a WinXP profile)

%userprofile%\Application Data\Macromedia\Flash Player\\support\flashplayer\sys\settings.sol

So to resolve for everyone do the following:

  • Logon as one user
  • Set the relevant options in the web based GUI
  • Copy the settings.sol file to a central location
  • Set a logon scripts to copy this file into each users profile at logon

job done.

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.NET Applications – Assembly cache

Posted on December 12th, 2008

During troubleshooting of an application I have discovered the following information.

Application: Interlink Service Control Manager v1.3.0.36 (SC_Manager)

Problem: After launching the app, you enter credentials and then the app closes.

Troubleshooting: Regmon / filemon / procmon show nothing unusual. The same happens as an admin. The Eventvwr has the following entry:

Event Type:    Error
Event Source:    .NET Runtime
Event Category:    None
Event ID:    1023
.NET Runtime version 2.0.50727.1433 – Fatal Execution Engine Error (79FFEE24) (80131506)

Researching this error gives the following Microsoft knowledge base article – KB913384. Installing the recommended hotfix did not resolve the problem in this case.

.NET applications seem to cache stuff to the following location:

  • C:\WINDOWS\assembly\NativeImages_v2.0.50727_32

FYI – The only way to get to this folder it Start | Run and paste this in. Browsing in My Computer doesn’t show this, even when you are showing all files inluding protected ones.

There are a bunch of folders here corresponding to the cached components. In my case the mscorlib file was getting cached so I remove the cached file from this location:

  • C:\WINDOWS\assembly\NativeImages_v2.0.50727_32\mscorlib\32e6f703c114f3a971cbe706586e3655\

Relaunching the app now worked fine.

I still have no idea why this happenned on multiple servers. There didn’t appear to be any hotfixes installed or changes to the system in between it working and then not working. If I find an answer i’ll post it here.

If anyone has more information as to how .NET apps use this caching location please post the links below.

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Intel® Processor Identification Utility

Posted on November 14th, 2008

Ever wondered exactly what processor is inside your desktop or server? Is it 64bit? Will it support virtualisation?

Now there is an easy way to check with the Intel Processor Identification Utility.

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IE7: How to stop from loading every time IE7 is started

Posted on September 1st, 2008

By default, on first launch of IE7 a runonce page is displayed.

Two registry values can be added to prevent running for every user in a Citrix session.

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]

These can be added by a logon scipt.

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