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Re: scp stalled

Hi Francesco,
as you have not heared of it, it is unlikely that you use it. So I would go for an mtu check. What is 'ping -M do -s 1472 login.plx.cineca.it' saying, does it work? 

Greets

Robert

Am 22.05.2014 08:53, schrieb Francesco Pietra:

Hi Robert:

francesco@tya64:~$ uname -r
3.2.0-4-amd64
francesco@tya64:~$


I do not understand "tunnel". I use classical scp, passwordless (my pub
keys at the mainframe):

francesco@tya64:~$ scp -p
fpietra0@login.plx.cineca.it:/gpfs/scratch/userexternal/fpietra0/P2f_accelMD_H2O_PLX/*30.dcd
/home/francesco/PLX


and "stalling" occurs randomly. I did not try with another box, where
jelly is installed. Also, I did not try either from the Linux prompt
(actually I us startx, followed by gnome-session. I am having those
problems from the gnome terminal). I never had such problems from a
French server at the Univ Picardie, but that automatically probalby uses
ftp (and it has to be used from the graphical interface).

Thanks
francesco



On Thu, May 22, 2014 at 8:00 AM, Robert Rottscholl <security@rinx.de
<mailto:security@rinx.de>> wrote:

    Hi Francesco,

    what kernel version do you use? There is an unfixed (in mainline)
    kernel bug in the tun device which might cause your problems (see
    https://bugzilla.kernel.org/__show_bug.cgi?id=74051
    <https://bugzilla.kernel.org/show_bug.cgi?id=74051> ). This will
    only be a problem if you use a tunnel to connect to your server.

    Greets

    Robert

    Am 21.05.2014 21 <tel:21.05.2014%2021>:16, schrieb Francesco Pietra:

        Hello:
        Since a few days, scp downloading 500MB file from a
        supercomputer at the
        Italian center CINECA results quite often in


        francesco@tya64:~/PLX$ scp -p
        fpietra0@login.plx.cineca.it:/__gpfs/scratch/userexternal/__fpietra0/P3f_accelMD_H2O_PLX/*__29.dcd
        /home/francesco/PLX
        npt_accel-29.dcd                                3%   13MB
        0.0KB/s -
        stalled -


        No problem with small files.

        Check at CINECA resulted in no malfunction. The provider
        (TELECOM ITALY)
        says their adsl if percetly functioning. Actually, the speed, ca
        600kb/s, is as expected (don't smile, Italy is at that speed; if
        you pay
        more, you can just hope to download at 1000kb/s, while out is always
        impracticably slow).

        My question is: can scp, as available from my installation on a
        wheezy
        amd64 box, be responsible?

        thanks for advice

        francesco pietra



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