For home use, I'm running the latest version of Astaro on a Dell 2.4 GHz P4. When I plug my Athlon 64 35 Windows XP machine straight in to my RCN cable modem, speed tests consistently indicate a full 7 megabits per second downstream. However, when I do speed tests through the Astaro firewall, my downstream data rate drops down to around 2-4 megabits per second. When I SSH in to my Astaro box, my cpu usage never goes above 5% used when doing these tests. Here is a link to the speed test I am using:
http://miranda.ctd.anl.gov:7123/
One of the things the tester says when running through firewall is "The network based flow control limits the application to 3.65 Mbps."
When using Astaro with a fast cable modem do settings such as receive window need to be manually tweaked as discussed at the following URL or is there some other issue?
http://www-didc.lbl.gov/TCP-tuning/buffers.html
Does anyone else experience large drops on speed tests when running through the firewall versus directly connecting their system to their cable modem?
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