[Ssh-sftp-perl-users] Net::SFTP dies on channel 1

[Chris L. <cp...@st...>]

The following snippet of code works fine if I set it loose
on localhost (openssh on linux):

use Net::SFTP;
use Data::Dump qw(dump);
my %args = (ssh_args => []);
$args{user} = $user;
$args{password} = $pass;
$args{debug} = 1;
#push @{ $args{ssh_args} }, protocol => 2;
my $sftp = Net::SFTP->new($host,%args); # line 13
dump $sftp->ls(".");

But if I take aim at a remote SFTP server (cygwin/openssh
on windows server 2003), the code above always dies in the
same way:

myhost: Login completed, opening dummy shell channel.
myhost: channel 0: new [client-session]
myhost: Requesting channel_open for channel 0.
myhost: channel 0: open confirm rwindow 0 rmax 32768
myhost: Got channel open confirmation, requesting shell.
myhost: Requesting service shell on channel 0.
myhost: channel 1: new [client-session]
myhost: Requesting channel_open for channel 1.
myhost: Sending subsystem: sftp
myhost: Requesting service subsystem on channel 1.
myhost: channel 1: open confirm rwindow 0 rmax 32768
myhost: sftp: Sending SSH2_FXP_INIT
myhost: channel 1: rcvd eof
myhost: channel 1: output open -> drain
myhost: channel 1: rcvd close
myhost: channel 1: input open -> closed
myhost: channel 1: close_read
myhost: channel 1: obuf empty
myhost: channel 1: output drain -> closed
myhost: channel 1: close_write
myhost: channel 1: send close
myhost: channel 1: full closed
Connection closed at ./test.pl line 13

Logging in using the command line 'sftp' utility works fine when
accessing the same remote windows server 2003 server (the one
connection remains stable for hours), so I'm at a bit of a loose end.

One thing I noticed when using the sftp utility though is that all
communications stay on channel 0.

I went thru the OpenBSD ssh_config (5) manpage looking for options
to disable channel 1 usage but came up blank.

Any tips?


Regards


Chris Langlands