Parts of the internet keep on disappearing on me

[E.S. Rosenberg]

>From the RFC (http://www.networksorcery.com/enp/rfc/rfc1323.txt):

 TCP Timestamps Option (TSopt):

         Kind: 8

         Length: 10 bytes

          +-------+-------+---------------------+---------------------+
          |Kind=8 |  10   |   TS Value (TSval)  |TS Echo Reply (TSecr)|
          +-------+-------+---------------------+---------------------+
              1       1              4                     4

         The Timestamps option carries two four-byte timestamp fields.
         The Timestamp Value field (TSval) contains the current value of
         the timestamp clock of the TCP sending the option.

         The Timestamp Echo Reply field (TSecr) is only valid if the ACK
         bit is set in the TCP header; if it is valid, it echos a times-
         tamp value that was sent by the remote TCP in the TSval field
         of a Timestamps option.  When TSecr is not valid, its value
         must be zero.  The TSecr value will generally be from the most
         recent Timestamp option that was received; however, there are
         exceptions that are explained below.

When you enable timestamps they don't match so the packet is
discarded, this could be due to the ISP fiddling with the packets on
the way.

Regards,

Eliyahu - אליהו




2013/1/24 Shachar Shemesh <shachar at shemesh.biz>

>  On 01/24/2013 10:04 AM, shimi wrote:
>
>
>
> On Thu, Jan 24, 2013 at 8:54 AM, Shachar Shemesh <shachar at shemesh.biz>wrote:
>
>>  Hail the conquering hero!
>>
>> Color me dumbfounded. Disabling TCP timestamps actually allows me to
>> connect to Google. Reenabling them re-introduces the problem.
>>
>> The only question still remaining is "why"? I have up on the site two
>> captures. One of the working session, and one of the not working session.
>> To me, this still looks like a kernel bug.
>>
>> Get them:
>> http://www.shemesh.biz/connection/working.dump
>> http://www.shemesh.biz/connection/notworking.dump
>>
>> Ideas, anyone?
>>
>
> Really have to go now, so I cannot take a look at the captures, but...
>
> You started the thread with "This is NOT an ISP problem". Any chance
> you're using BezeqInt?
>
> Indeed I am. Please stop sounding clairvoyant and start sharing your
> experience. If I need to call and yell, I want to be as informed as I can
> get.
>
> Shachar
>
> --
> Shachar Shemesh
>
>
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>
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