<div dir="ltr"><br><br><div class="gmail_quote">On Mon, Jun 4, 2012 at 9:12 AM, Aharon Schkolnik <span dir="ltr"><<a href="mailto:schkolnik@013.net" target="_blank">schkolnik@013.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div style="font-family:'Abyssinica SIL';font-size:10pt;font-weight:400;font-style:normal"><div class="im">
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">On Thursday, May 31, 2012, shimi wrote:</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> On Thu, May 31, 2012 at 2:19 PM, Oleg Goldshmidt <<a href="mailto:pub@goldshmidt.org" target="_blank">pub@goldshmidt.org</a>> wrote:</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > On Thu, May 31, 2012 at 2:10 PM, ronys <<a href="mailto:ronys@gmx.net" target="_blank">ronys@gmx.net</a>> wrote:</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> >> Looks like Walla's having electric problems at their servers:</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> >> <a href="http://www.globes.co.il/news/article.aspx?did=1000753302" target="_blank">http://www.globes.co.il/news/article.aspx?did=1000753302</a></p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > FWIW, I get "connection reset" *all the time* from various Google</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > services - gmail, news, search, maps, youtube. I stopped raising a</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > brow, just hit the "try again" button. It never occurred to me to</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > suspect Linux (this looks to me a Google-specific issue) - I thought</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > those were glitches in Google's massive datacenters... Or maybe in</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> > some Israeli cache or whatever.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> More likely than a Linux's "fault", is faulty routers (or appliances) on</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> your path to Google's servers, that think they're smarter than Internet</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> endpoints, instead of just... routing traffic, what they were originally</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> supposed to do. Sometimes it's those "smart" QoS boxes...</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> </p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> Recently I did a very long debugging session on a customer of</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> Netvision/Barak, and realized that their equipment doesn't like the</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> "advanced" features enabled by Linux by default - the behavior of the</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> ISP network changed as I modified the things below. I would start</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> echoing 0 to numerous stuff under /proc/sys/net/ipv4/* to see if the</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">> problem alleviates.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"><br></p>
</div><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px">If the problem is related to one of these features, would that explain the instances where I can get an URL with wget, but not access it from a browser ?</p>
<div class="im">
<p style="margin:0px;text-indent:0px"><br></p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px;text-indent:0px"><br></p></div></div></blockquote><div><br>Yes, different apps can use different features of TCP. Actually, when I started this debugging what I was talking about, Telnet (from netkit-telnetd) to port 80 and access from FF, and MSIE, all behaved differently... <br>
</div></div><br>Try "tcpdump port 80" and compare the options...<br><br>-- Shimi<br></div>