openssh unix dev - Mar 2014 - Query on window adjust in SSH server

Hi,

      I have a problem regarding window adjust, in the SSH server.

 I was trying to get a file of 400K from a system, via SFTP, which has old
version of openSSH [v2.0 or so] in it. I'm using Windows client, filezilla,
to get thre file. Once it reaches ~12k, the transfer gets halted. On
debugging I could find that it has reached the maximum window size in the
server and the client is never again sending the window adjust message.

    In RFC, I couldn't find anything about handling this situation. Can you
please let me know whether the server has the 'right' to adjust the
window
size without the message from client. Or is there any reason for the client
not sending the adjust message[like its not aware of window exhausted in
server]?

-- 
??????????????
???

On 17/03/14 05:55, abhilash abraham wrote:
> Hi,
>
>        I have a problem regarding window adjust, in the SSH server.
>
>   I was trying to get a file of 400K from a system, via SFTP, which has old
> version of openSSH [v2.0 or so] in it. I'm using Windows client,
filezilla,
> to get thre file. Once it reaches ~12k, the transfer gets halted. On
> debugging I could find that it has reached the maximum window size in the
> server and the client is never again sending the window adjust message.
>
>      In RFC, I couldn't find anything about handling this situation.
Can you
> please let me know whether the server has the 'right' to adjust the
window
> size without the message from client. Or is there any reason for the client
> not sending the adjust message[like its not aware of window exhausted in
> server]?
This looks like a TCP question, not a sshd one.
Were you viewing the messages on client or server? Is it possible that 
frames
go missing in the client-server communication?