Hi Silvia,

On Tue, Mar 11, 2014 at 2:30 PM, Silvia Fichera <fichera....@gmail.com>wrote:

> Hi,
> I was checking the wireshark capture on the controller (pox) and filtered
> tcp syn packet.
> (tcp.flags.syn==1 and tcp.flags.ack==0)
>
> I know that my TCP server receives more or less 400 syn packets, but I see
> approximately 12000
>
>
Firstly I don't know if you should trust wireshark with packet captures
with 12000 SYN packets. It is lossy.

Secondly, TCP SYN packets are generated by the application layer thinking
there is no connection with the server and then wants to connect to the
server. What are you running on the application layer ? HTTP ? NFS ?

Thirdly, try and take a look if there any RSTs you see in the capture.

Some more details about what it is you are doing will help debug.


> I would like to make statistics about syn packet processed by the
> controller, but I think that there is something wrong...
>
>
I am pretty much a noob, so please excuse if my leads are wrong.


> Thank you
> --
> Silvia Fichera
>
> Naman

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