Re: Default TCP Options creating problems

[Nanda Kumar <heramba85@xxxxxxxxx>]

Hi Eric,

On Friday 27 January 2012 08:19 PM, Eric Dumazet wrote:
> Le vendredi 27 janvier 2012 à 19:45 +0530, Nanda Kumar a écrit :
> > Hi,
> >
> > I am using Ubuntu 11.10 and unable to connect to my ISP login server.
> > The same is working under windows. Under linux, ISP server does not
> > respond TCP SYN packet even. I did a comparison of packet capture of
> > windows and linux and found, linux include TCP options by default.
> > After manually disabling TCP Timestamp via sysctl, the login is
> > happening fine.
> >
> > Is there any reason why TCP option is enabled by default? The same
> > problem was happening under OpenSUSE 12.1 x86_64 also. My friend
> > informed me that his android mobile is also unable to connect to ISP
> > login server.
> I am very sorry, but you should complain to your ISP, 20 years after RFC
> 1323, it should support it.
>
> TCP options are ... options, and as such should not be denied by a
> conformant TCP stack.

Thank you for the reply. Yes even I feel so. I have put up this issue to 
ISP.

However this issue is happening only with TCP timestamp option. All 
other options are working fine. Any idea?

Regards,
Nandakumar
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