11 Mbit connect drops to 5mbit behind Astaro

So I've been getting an install of Astaro up and running and have been tweaking various settings. Today I ran a speed test behind Astaro and was surprised at how drastic the speed of my internet connection was reduced. Prior to installing, when running a speed test at speakeasy.net/speedtest, I was getting speeds over 11Mbit / sec. Earlier today when I tested it, the best speed I could get was 4.8Mbit / sec.

I am running Astaro from a Virtual Machine (VMWare ESXi); however, it has over 50% free ram and when running the speed test was only using 2-3% cpu.

Is this typical for Astaro? Or did I do something wrong while installing / configuring?

Thanks!
Jonathan