Walla mail from Linux - Error 101 (net::ERR_CONNECTION_RESET) : The connection was reset.

[Aharon Schkolnik]

On Thursday, May 31, 2012, shimi wrote:
> On Thu, May 31, 2012 at 2:19 PM, Oleg Goldshmidt <pub at goldshmidt.org> 
wrote:
> > On Thu, May 31, 2012 at 2:10 PM, ronys <ronys at gmx.net> wrote:
> >> Looks like Walla's having electric problems at their servers:
> >> http://www.globes.co.il/news/article.aspx?did=1000753302
> > 
> > FWIW, I get "connection reset" *all the time* from various Google
> > services - gmail, news, search, maps, youtube. I stopped raising a
> > brow, just hit the "try again" button. It never occurred to me to
> > suspect Linux (this looks to me a Google-specific issue) - I thought
> > those were glitches in Google's massive datacenters... Or maybe in
> > some Israeli cache or whatever.
> 
> More likely than a Linux's "fault", is faulty routers (or appliances) on
> your path to Google's servers, that think they're smarter than Internet
> endpoints, instead of just... routing traffic, what they were originally
> supposed to do. Sometimes it's those "smart" QoS boxes...
> 
> Recently I did a very long debugging session on a customer of
> Netvision/Barak, and realized that their equipment doesn't like the
> "advanced" features enabled by Linux by default - the behavior of the
> ISP network changed as I modified the things below. I would start
> echoing 0 to numerous stuff under /proc/sys/net/ipv4/* to see if the
> problem alleviates.

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 ?

> 
> Start with disabling:
> 
> TCP Timestamps
> TCP SYN Cookies
> Window Scaling
> Selective ACKs (SACKs)
> 
> Also try MTU @ 1300 for the fun
> 
> And if you have TCP Offloading... might want to disable that, too. It
> could be your NIC / NIC driver.
> 
> Good luck :-)
> 
> -- Shimi


-- 
  The day is short, and the work is great,    |  Aharon Schkolnik
  and the laborers are lazy, and the reward   |  
  is great, and the Master of the house is    |  aschkolnik at gmail.com
  impatient. - Ethics Of The Fathers Ch. 2    |  054 3344135
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