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Old 05-21-2012, 05:12 AM   #1
ravishankaradepu
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SSH working but SCP not working


Hi,
i have implemented Password-less ssh to my server.
Now i can ssh to my server but i cant do scp to my server.
But i can scp from my server machine to client
 
Old 05-21-2012, 08:56 AM   #2
blue_print
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Have you set password-less SSH from client to server? If so, password-less SSH from client to server is working?
 
Old 05-21-2012, 10:15 AM   #3
ravishankaradepu
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Originally Posted by blue_print View Post
Have you set password-less SSH from client to server? If so, password-less SSH from client to server is working?
I have set passwordless ssh from client to server.
Now ssh is working from client to server but scp is not working
 
Old 05-21-2012, 10:38 AM   #4
blue_print
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Can you please paste the ssh and scp commands you're trying?
 
Old 05-21-2012, 10:26 PM   #5
ravishankaradepu
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Originally Posted by blue_print View Post
Can you please paste the ssh and scp commands you're trying?
ravishankaradepu@ravishankaradepu-CELSIUS-M470-2:~$ ssh -v printer@192.168.4.151
OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.4.151 [192.168.4.151] port 22.
debug1: Connection established.
debug1: identity file /home/ravishankaradepu/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/ravishankaradepu/.ssh/id_rsa-cert type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_dsa type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_dsa-cert type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_ecdsa type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-4ubuntu6
debug1: match: OpenSSH_5.5p1 Debian-4ubuntu6 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 52:7c:ec:27:16:f0:d7:5c:1c:56:b6:a8:79:d7:c1:e4
debug1: Host '192.168.4.151' is known and matches the RSA host key.
debug1: Found key in /home/ravishankaradepu/.ssh/known_hosts:9
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/ravishankaradepu/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.4.151 ([192.168.4.151]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Remote: Forced command: /usr/local/sbin/log-session
debug1: Remote: Forced command: /usr/local/sbin/log-session
debug1: Sending environment.
debug1: Sending env LC_MESSAGES = en_IN.UTF-8
debug1: Sending env LANG = en_IN
printer@printer-CELSIUS-M470-2:~$


ravishankaradepu@ravishankaradepu-CELSIUS-M470-2:~$ scp -v My_cv.doc printer@192.168.4.151:.
Executing: program /usr/bin/ssh host 192.168.4.151, user printer, command scp -v -t -- .
OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.4.151 [192.168.4.151] port 22.
debug1: Connection established.
debug1: identity file /home/ravishankaradepu/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/ravishankaradepu/.ssh/id_rsa-cert type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_dsa type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_dsa-cert type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_ecdsa type -1
debug1: identity file /home/ravishankaradepu/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-4ubuntu6
debug1: match: OpenSSH_5.5p1 Debian-4ubuntu6 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-1ubuntu3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA 52:7c:ec:27:16:f0:d7:5c:1c:56:b6:a8:79:d7:c1:e4
debug1: Host '192.168.4.151' is known and matches the RSA host key.
debug1: Found key in /home/ravishankaradepu/.ssh/known_hosts:9
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/ravishankaradepu/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.4.151 ([192.168.4.151]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Remote: Forced command: /usr/local/sbin/log-session
debug1: Remote: Forced command: /usr/local/sbin/log-session
debug1: Sending environment.
debug1: Sending env LC_MESSAGES = en_IN.UTF-8
debug1: Sending env LANG = en_IN
debug1: Sending command: scp -v -t -- .
Sending file modes: C0644 28672 My_cv.doc
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype eow@openssh.com reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Transferred: sent 2752, received 2408 bytes, in 0.2 seconds
Bytes per second: sent 15039.6, received 13159.6
debug1: Exit status 0
lost connection
 
Old 05-22-2012, 01:43 AM   #6
pan64
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it looks like a problem on the other side. Probably scp cannot write the file or ??? Can you check the logs on that host also?
 
Old 05-22-2012, 03:22 AM   #7
ravishankaradepu
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Quote:
Originally Posted by pan64 View Post
it looks like a problem on the other side. Probably scp cannot write the file or ??? Can you check the logs on that host also?
I checked /var/log/syslog but it dosent have anything there...!!
 
Old 05-22-2012, 04:09 AM   #8
ravishankaradepu
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Quote:
Originally Posted by ravishankaradepu View Post
I checked /var/log/syslog but it dosent have anything there...!!
I got the problem
When ever i am ssh using password less ssh , i use forced command to store the session to a file. I use the following script to do that.
Now what should i do to do this for scp also??

#!/bin/sh
#
# log-session
# John Simpson <jms1@jms1.net> 2008-08-06
#
###############################################################################
#
# Copyright (C) 2008 John Simpson.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
###############################################################################
#
# configuration

# copy this value from the "Subsystem sftp" line in your sshd_config file
SFTP_SERVER=/usr/lib/openssh/sftp-server

###############################################################################
###############################################################################
###############################################################################

NOW=`date +%Y-%m-%d.%H%M%S`
IP=`echo $SSH_CLIENT | sed 's/ .*//'`
#LOGFILE=/root/.ssh/log.$NOW.$IP
LOGFILE=/home/printer/.ssh/log.$NOW.$IP
# if you want to log the initial contents of the environment received from
# sshd, un-comment these lines.
#
# env | sort >> $LOGFILE
# echo "========================================" >> $LOGFILE

# the "internal-sftp" service is new as of openssh 5.0. it works like
# the sftp server logic is built into sshd, and as such it's capable of
# chroot'ing users into their home directories.
# there's no way to "redirect" execution back into it, so the best we
# can do is exec the old sftp-server instead, which will give the user a
# working sftp session, but won't chroot them into their home directory.

if [ "${SSH_ORIGINAL_COMMAND:-}" = "internal-sftp" ]
then
echo "substituting $SFTP_SERVER for internal SFTP service" >> $LOGFILE
echo "========================================" >> $LOGFILE
exec $SFTP_SERVER

# if they're requesting the sftp server, this is an sftp command.
# logging the traffic wouldn't make much sense, it's a binary protocol...
# although if you really want to log the raw data, comment out this block
# and let execution fall through to the next block.

elif [ "${SSH_ORIGINAL_COMMAND:-}" = "$SFTP_SERVER" ]
then
echo starting SFTP service >> $LOGFILE
echo ======================================== >> $LOGFILE
exec $SFTP_SERVER

# if the user asked for a specific command, run that command
# but log the traffic going into and out of it.

elif [ -n "${SSH_ORIGINAL_COMMAND:-}" ]
then
echo executing $SSH_ORIGINAL_COMMAND >> $LOGFILE
echo ======================================== >> $LOGFILE
exec script -a -f -q -c "$SSH_ORIGINAL_COMMAND" $LOGFILE

# no command was requested, user wants an interactive shell.
# of course, log the traffic going in and out of it.

else
echo starting interactive shell session >> $LOGFILE
echo ======================================== >> $LOGFILE
exec script -a -f -q $LOGFILE
fi

# if we get to this point, an "exec" failed somewhere.

echo exec failed, rv=$?
exit 1
 
Old 05-22-2012, 04:14 AM   #9
pan64
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what I see is: scp looks for authentication in /home/ravishankaradepu but it wants to write into the home of printer. Try to execute
scp My_cv.doc printer@192.168.4.151:/tmp, use full path, instead of .
 
Old 05-22-2012, 04:18 AM   #10
ravishankaradepu
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Quote:
Originally Posted by pan64 View Post
what I see is: scp looks for authentication in /home/ravishankaradepu but it wants to write into the home of printer. Try to execute
scp My_cv.doc printer@192.168.4.151:/tmp, use full path, instead of .
Same Lost connection is being outputted
 
Old 05-22-2012, 04:26 AM   #11
pan64
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Oh yes, that can be a problem also. this log-session started by scp also, you can see it in the debug log. This shell script will write log to /home/printer/.ssh/log.$NOW.$IP. You can check the content.
 
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Old 05-22-2012, 04:35 AM   #12
ravishankaradepu
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Quote:
Originally Posted by pan64 View Post
Oh yes, that can be a problem also. this log-session started by scp also, you can see it in the debug log. This shell script will write log to /home/printer/.ssh/log.$NOW.$IP. You can check the content.
What changes should be done to the log-session ??
 
Old 05-22-2012, 04:40 AM   #13
pan64
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I do not know what's happened, so would be better to see the log
 
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Old 05-22-2012, 04:41 AM   #14
ravishankaradepu
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Quote:
Originally Posted by pan64 View Post
I do not know what's happened, so would be better to see the log
One line was written to the file , but it was not readable
 
Old 05-22-2012, 05:46 AM   #15
pan64
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you can insert a line into that log-session script:
Code:
#!/bin/sh
set -xv           # <== insert this line
#
# log-session
# John Simpson <jms1@jms1.net> 2008-08-06
and test it again. That one line is not an acceptable result.
Also you can try to move it:
LOGFILE=/tmp/sshlog.$NOW.$IP
 
  


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