Ondrej Žilinec – IT Blog

Last week I was playing with application virtualization. I do have experiences with VMWare Thinapp applications. I already did couple of those virtualized applications. When I was forced to use App-V to create virtualized application I needed to make one application and I needed make this application to write registries into real registries and not to virtual ones. I thought it would be same as in VMWare Thinapp. That means I would expect to set some “isolation” mode on registry branch.

Problem is that you can define only two modes in App-V for registries:

• Merge with Local Key – This will merge real registries with virtual ones. Change will be written into virtual registries.
• Override Local Key – This will show only virtual registries to application and changes will be written into virtual registries.

In VMWare Thinapp there are isolation modes (for file system structures and also for registries) defined as following:

• Full – Real are not shown. Any modification goes into virtual. New elements go into virtual.
• Merged – Real are shown. Modification of virtual goes to virtual. Modification of real goes to real. New elements go to real.
• WriteCopy – Real are shown. Modification of virtual goes to virtual. Modification of real goes to virtual. New elements go to virtual.

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When I upgraded from ISA 2006 to TMG 2010 I found some special problem. There was HQ with TMG 2010 and one branch with ASA 5505. Between those two location there was Site to Site VPN tunnel created. Everything worked fine, beside one problem. Users in branch couldn’t access anything on TMG server. They couldn’t ping it or do anything with it. They couldn’t browse Internet, because TMG was also web proxy server for them.

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