You would need to know what to sniff, e.g. if tcp dynamic window scaling is enabled.<div><br></div><div>I'll be interested in what you consider dirty tricks? <br>AFAIK increasing the tcp window size (read: send more data for every ack) is not considered dirty trick at all, and is very efficient with good connections (low packet drop) and high latency.</div>
<div><br></div><div>Ohad<br><div class="gmail_quote">2010/3/6 Shachar Shemesh <span dir="ltr"><<a href="mailto:shachar@shemesh.biz">shachar@shemesh.biz</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div dir="ltr" bgcolor="#ffffff" text="#000000"><div class="im">
Hetz Ben Hamo wrote:
<blockquote type="cite">
<div dir="rtl">
<div dir="ltr">Hi people,</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I'm having an argument with a hosting company abroad.
Their mirror server gives me full speed download (600k on my 5Mbit
ADSL) while my server there gives me half.</div>
<div dir="ltr">They say that they don't use any QoS tricks.</div>
<div dir="ltr"><br>
</div>
<div dir="ltr">I have talked to their support and I heard a weird
claim: their mirror server's kernel is "optimized for long distance
download".</div>
<div dir="ltr">I never heard of such a thing in my life with the
Linux kernel of such a thing..</div>
</div>
</blockquote></div>
Short answer - run a sniffer on both downloads.<br>
<br>
Longer answer - there are some tricks you can do, some of them "legal",
others violating the TCP/IP standard, in order to handle high latency
links better. They might be referring to those.<br>
<br>
Conclusion - run a sniffer :-)<br>
<br>
Shachar<br>
<br>
<pre cols="72">--
Shachar Shemesh
Lingnu Open Source Consulting Ltd.
<a href="http://www.lingnu.com" target="_blank">http://www.lingnu.com</a>
</pre>
</div>
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