5

In my Debian Squeeze server, scp and rsync do not seem to copy over anything. Works fine with another server though (so not a client problem). When using scp, it just creates an empty file and waits. /etc/bash.bashrc contains [ -z "$PS1" ] && return at the top as well. SSH works fine. What might be the problem?

Diagnostics

foo.bar: plain text file of size 10899 bytes

scp -vvv /tmp/foo.bar server:/tmp

Executing: program /usr/bin/ssh host server, user (unspecified), command scp -v -t -- /tmp OpenSSH_5.8p1-hpn13v10, OpenSSL 1.0.0d 8 Feb 2011 debug1: Reading configuration data /home/alanhaggai/.ssh/config debug1: Applying options for server debug1: Reading configuration data /etc/ssh/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to server.com [111.222.111.222] port 22. debug1: Connection established. debug3: Incorrect RSA1 identifier debug3: Could not load "/home/alanhaggai/.ssh/id_rsa" as a RSA1 public key debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/alanhaggai/.ssh/id_rsa type 1 debug1: identity file /home/alanhaggai/.ssh/id_rsa-cert type -1 debug1: identity file /home/alanhaggai/.ssh/id_dsa type -1 debug1: identity file /home/alanhaggai/.ssh/id_dsa-cert type -1 debug1: identity file /home/alanhaggai/.ssh/id_ecdsa type -1 debug1: identity file /home/alanhaggai/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debian-6 debug1: match: OpenSSH_5.5p1 Debian-6 pat OpenSSH* debug1: Remote is NON-HPN aware debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8p1-hpn13v10 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "server.com" from file "/home/alanhaggai/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/alanhaggai/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: [email protected],[email protected],ssh-rsa debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: AUTH STATE IS 0 debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: [email protected],[email protected],ssh-rsa,[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: none,[email protected],zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected] debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: none,[email protected] debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: REQUESTED ENC.NAME is 'aes128-ctr' debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: REQUESTED ENC.NAME is 'aes128-ctr' 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 debug2: dh_gen_key: priv key bits set: 138/256 debug2: bits set: 514/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Server host key: RSA a1:28:fd:35:98:19:ee:73:19:a8:de:1d:20:33:b6:6d debug3: load_hostkeys: loading entries for host "server.com" from file "/home/alanhaggai/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/alanhaggai/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug3: load_hostkeys: loading entries for host "111.222.111.222" from file "/home/alanhaggai/.ssh/known_hosts" debug3: load_hostkeys: found key type RSA in file /home/alanhaggai/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys debug1: Host 'server.com' is known and matches the RSA host key. debug1: Found key in /home/alanhaggai/.ssh/known_hosts:1 debug2: bits set: 525/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/alanhaggai/.ssh/id_rsa (0x6813f0) debug2: key: /home/alanhaggai/.ssh/id_dsa ((nil)) debug2: key: /home/alanhaggai/.ssh/id_ecdsa ((nil)) debug1: Authentications that can continue: publickey,password debug3: start over, passed a different list publickey,password debug3: preferred publickey,keyboard-interactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/alanhaggai/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ssh-rsa blen 277 debug2: input_userauth_pk_ok: fp db:e7:33:bd:a8:1e:ae:fa:3b:3d:85:da:c0:9f:4a:6d debug3: sign_and_send_pubkey: RSA db:e7:33:bd:a8:1e:ae:fa:3b:3d:85:da:c0:9f:4a:6d debug1: read PEM private key done: type RSA debug1: Authentication succeeded (publickey). Authenticated to server.com ([111.222.111.222]:22). debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: HPN to Non-HPN Connection debug1: Final hpn_buffer_size = 2097152 debug1: HPN Disabled: 0, HPN Buffer Size: 2097152 debug1: channel 0: new [client-session] debug1: Enabled Dynamic Window Scaling debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Requesting [email protected] debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x08 debug1: Sending command: scp -v -t -- /tmp debug2: channel 0: request exec confirm 1 debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 debug2: channel 0: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 0 debug2: exec request accepted on channel 0 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 Sending file modes: C0644 10899 foo.bar debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 debug2: channel 0: rcvd ext data 30 debug2: tcpwinsz: 87380 for connection: 3 Sink: C0644 10899 foo.bar debug2: channel 0: written 30 to efd 6 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3 foo.bar 100% 11KB 10.6KB/s 10.6KB/s 00:00 debug2: tcpwinsz: 87380 for connection: 3 debug2: tcpwinsz: 87380 for connection: 3

After a while:

^C (on interrupt)

debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1) debug1: fd 0 clearing O_NONBLOCK debug1: fd 1 clearing O_NONBLOCK Killed by signal 2.

/etc/ssh/sshd_config

# Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin yes StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes

Inference: Not a client-side problem as scp and rsync work fine with another server

Steps Taken

  • OpenSSH server was removed, purged and re-installed
  • Adjusted permissions of .ssh/ and files within
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2 Answers 2

Reset to default
1

I suspect that the misbehaving server has some unusual stuff in ~/.bashrc, ~/.profile or other startup scripts. Every time I've seen similar behaviour there has been some autorunning software on .bashrc or something similar.

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2
  • 1
    I have removed both the files, but the behaviour exists. Commented Jul 26, 2011 at 8:12
  • Thanks for your answer. Though useful, my case seems to be a different problem. I am suspecting the ISP (that the client uses) is playing bad. When I tried from a different connection, scp worked! Commented Jul 26, 2011 at 13:56
1

It seems to have been a once in a blue moon bug with the ISP. Happy that it has not occurred ever since. :-)

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