If you have linux you can do it without using flash, like I did from my server
https://github.com/sivel/speedtest-cli
./speedtest-cli --list (will list all the speed test servers)
./speedtest-cli --server 3681 --share (use selected server and generate share link)
Quote:
Testing download speed........................................
Download: 903.07 Mbits/s
Testing upload speed............................................. .....
Upload: 215.82 Mbits/s
Share results: http://www.speedtest.net/result/3658293150.png
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Knew flash was a resource hog but surprises me it a 4Ghz machine struggles.
It's possible to find and change the values in memory of flash programs quite easily, so I would expect it's easy to change the result the speedtest flash posts to the server to record. Not tried but if it works that way, probably easier to sniff the network traffic and make your own submission thinking about it.
Can't help it, mind is always thinking of vulnerabilities in web page implementations
Btw, try faking your x-forwarded-for when you visit speedtest.net
