[Snort-users] Off topic...how does DSL reports and the like test speed...someth ing I can use myself?
mkettler at ...4108...
Wed Nov 10 07:57:04 EST 2004
At 09:13 AM 11/10/2004, Jason Humes wrote:
>So we are looking for a way to test various customers throughput and so far
>we cant find anything which will test throughput without having to install
>an agent (or something like that) at each customer site. How does DSL
>Reports or similar sites perform their speed testing? Does anyone know of
>software like that which I could run on our servers and have our clients run
>the speed tests themselves, to our sites? We need some sort of throughput
>test which does not require the use of agents on both sides of the link.
>Any ideas. Thanks.
I don't know of any freebies that don't involve agents on both ends, but I
can explain how most of the sites out there work.
Most of these work by giving the client a large image file to download and
measuring how long it takes to complete on the server side.
Others use a small script which downloads a file and measures the speed on
the client side.
cnet's tool uses an image file:
http://www.beelinebandwidthtest.com/ uses a shockwave flash application
that downloads 175k of data. I presume it measures the time on the client
side in the flash code.
Of course, most of these tests are fairly prone to wild variation. I ran
three tests on cnet's site, the first was absurdly slow (300k) and the
other two indicated t1 class bandwidth. Tests at two other sites indicated
t1 and 110% of t1 (The link here is a bit odd, but the actual sustained
bandwidth is about 30% higher than a t1).
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