1.9.3-p125 :001 > require 'rubygems'; require 'net/sftp'
 => true 
1.9.3-p125 :002 > ssh = Net::SSH.start('172.16.17.37', 'root', :password => 'toto1234', :verbose => :debug)
D, [2012-03-05T10:31:49.588944 #58001] DEBUG -- net.ssh.transport.session[80537214]: establishing connection to 172.16.17.37:22
D, [2012-03-05T10:31:49.594360 #58001] DEBUG -- net.ssh.transport.session[80537214]: connection established
I, [2012-03-05T10:31:49.594561 #58001]  INFO -- net.ssh.transport.server_version[8053a798]: negotiating protocol version
D, [2012-03-05T10:31:49.613729 #58001] DEBUG -- net.ssh.transport.server_version[8053a798]: remote is `SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze1'
D, [2012-03-05T10:31:49.613827 #58001] DEBUG -- net.ssh.transport.server_version[8053a798]: local is `SSH-2.0-Ruby/Net::SSH_2.3.0 x86_64-darwin10.8.0'
D, [2012-03-05T10:31:49.621763 #58001] DEBUG -- tcpsocket[8053adc4]: read 784 bytes
D, [2012-03-05T10:31:49.621919 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 0 type 20 len 780
I, [2012-03-05T10:31:49.622031 #58001]  INFO -- net.ssh.transport.algorithms[8053962c]: got KEXINIT from server
I, [2012-03-05T10:31:49.622161 #58001]  INFO -- net.ssh.transport.algorithms[8053962c]: sending KEXINIT
D, [2012-03-05T10:31:49.622336 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 0 type 20 len 716
D, [2012-03-05T10:31:49.622412 #58001] DEBUG -- tcpsocket[8053adc4]: sent 720 bytes
I, [2012-03-05T10:31:49.622452 #58001]  INFO -- net.ssh.transport.algorithms[8053962c]: negotiating algorithms
D, [2012-03-05T10:31:49.622716 #58001] DEBUG -- net.ssh.transport.algorithms[8053962c]: negotiated:
* kex: diffie-hellman-group-exchange-sha1
* host_key: ssh-rsa
* encryption_server: aes128-cbc
* encryption_client: aes128-cbc
* hmac_client: hmac-sha1
* hmac_server: hmac-sha1
* compression_client: zlib@openssh.com
* compression_server: zlib@openssh.com
* language_client: 
* language_server: 
D, [2012-03-05T10:31:49.622757 #58001] DEBUG -- net.ssh.transport.algorithms[8053962c]: exchanging keys
D, [2012-03-05T10:31:49.622996 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 1 type 34 len 20
D, [2012-03-05T10:31:49.623045 #58001] DEBUG -- tcpsocket[8053adc4]: sent 24 bytes
D, [2012-03-05T10:31:49.672012 #58001] DEBUG -- tcpsocket[8053adc4]: read 152 bytes
D, [2012-03-05T10:31:49.672207 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 1 type 31 len 148
D, [2012-03-05T10:31:49.677613 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 2 type 32 len 140
D, [2012-03-05T10:31:49.677755 #58001] DEBUG -- tcpsocket[8053adc4]: sent 144 bytes
D, [2012-03-05T10:31:49.695762 #58001] DEBUG -- tcpsocket[8053adc4]: read 720 bytes
D, [2012-03-05T10:31:49.695976 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 2 type 33 len 700
D, [2012-03-05T10:31:49.704789 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 3 type 21 len 20
D, [2012-03-05T10:31:49.704888 #58001] DEBUG -- tcpsocket[8053adc4]: sent 24 bytes
D, [2012-03-05T10:31:49.704984 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 3 type 21 len 12
D, [2012-03-05T10:31:49.705396 #58001] DEBUG -- net.ssh.authentication.session[8050ae08]: beginning authentication of `root'
D, [2012-03-05T10:31:49.705548 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 4 type 5 len 28
D, [2012-03-05T10:31:49.705598 #58001] DEBUG -- tcpsocket[8053adc4]: sent 52 bytes
D, [2012-03-05T10:31:49.753742 #58001] DEBUG -- tcpsocket[8053adc4]: read 52 bytes
D, [2012-03-05T10:31:49.753979 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 4 type 6 len 28
D, [2012-03-05T10:31:49.754220 #58001] DEBUG -- net.ssh.authentication.session[8050ae08]: trying publickey
D, [2012-03-05T10:31:49.769481 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: connecting to ssh-agent
D, [2012-03-05T10:31:49.769699 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: sending agent request 1 len 51
D, [2012-03-05T10:31:49.769839 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: received agent packet 2 len 5
D, [2012-03-05T10:31:49.769905 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: sending agent request 11 len 0
D, [2012-03-05T10:31:49.770097 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: received agent packet 12 len 469
D, [2012-03-05T10:31:49.770605 #58001] DEBUG -- net.ssh.authentication.methods.publickey[80508edc]: trying publickey (d9:52:08:1e:f8:bd:18:5d:7a:c3:20:e5:7a:76:f1:4b)
D, [2012-03-05T10:31:49.770881 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 5 type 50 len 508
D, [2012-03-05T10:31:49.770982 #58001] DEBUG -- tcpsocket[8053adc4]: sent 532 bytes
D, [2012-03-05T10:31:49.778203 #58001] DEBUG -- tcpsocket[8053adc4]: read 484 bytes
D, [2012-03-05T10:31:49.778454 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 5 type 60 len 460
D, [2012-03-05T10:31:49.778783 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: sending agent request 13 len 960
D, [2012-03-05T10:31:49.780555 #58001] DEBUG -- net.ssh.authentication.agent[805089b4]: received agent packet 14 len 60
D, [2012-03-05T10:31:49.780816 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 6 type 50 len 556
D, [2012-03-05T10:31:49.780921 #58001] DEBUG -- tcpsocket[8053adc4]: sent 580 bytes
D, [2012-03-05T10:31:49.787497 #58001] DEBUG -- tcpsocket[8053adc4]: read 36 bytes
D, [2012-03-05T10:31:49.787753 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 6 type 52 len 12
D, [2012-03-05T10:31:49.787860 #58001] DEBUG -- net.ssh.authentication.methods.publickey[80508edc]: publickey succeeded (d9:52:08:1e:f8:bd:18:5d:7a:c3:20:e5:7a:76:f1:4b)
 => #<Net::SSH::Connection::Session:0x00000100a04f78 @logger=#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>, @transport=#<Net::SSH::Transport::Session:0x00000100a6e428 @logger=#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>, @host="172.16.17.37", @port=22, @bind_address=nil, @options={:compression=>["zlib@openssh.com", "zlib"], :user=>"root", :password=>"toto1234", :verbose=>:debug, :logger=>#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>}, @facility="net.ssh.transport.session[80537214]", @socket=#<TCPSocket:fd 5>, @queue=[], @host_key_verifier=#<Net::SSH::Verifiers::Lenient:0x00000100a74f80>, @server_version=#<Net::SSH::Transport::ServerVersion:0x00000100a74f30 @header="", @version="SSH-2.0-OpenSSH_5.5p1 Debian-6+squeeze1", @logger=#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>, @facility="net.ssh.transport.server_version[8053a798]">, @host_as_string="172.16.17.37", @algorithms=#<Net::SSH::Transport::Algorithms:0x00000100a72c58 @session=#<Net::SSH::Transport::Session:0x00000100a6e428 ...>, @logger=#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>, @options={:compression=>["zlib@openssh.com", "zlib"], :user=>"root", :password=>"toto1234", :verbose=>:debug, :logger=>#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>}, @algorithms={:host_key=>["ssh-rsa", "ssh-dss"], :kex=>["diffie-hellman-group-exchange-sha1", "diffie-hellman-group1-sha1", "diffie-hellman-group-exchange-sha256"], :encryption=>["aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "rijndael-cbc@lysator.liu.se", "idea-cbc", "none", "arcfour128", "arcfour256"], :hmac=>["hmac-sha1", "hmac-md5", "hmac-sha1-96", "hmac-md5-96", "hmac-sha2-256", "hmac-sha2-512", "hmac-sha2-256-96", "hmac-sha2-512-96", "none"], :compression=>["zlib@openssh.com", "zlib", "none"], :language=>[], :encryption_server=>["aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "rijndael-cbc@lysator.liu.se", "idea-cbc", "none", "arcfour128", "arcfour256"], :encryption_client=>["aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "rijndael-cbc@lysator.liu.se", "idea-cbc", "none", "arcfour128", "arcfour256"], :hmac_server=>["hmac-sha1", "hmac-md5", "hmac-sha1-96", "hmac-md5-96", "hmac-sha2-256", "hmac-sha2-512", "hmac-sha2-256-96", "hmac-sha2-512-96", "none"], :hmac_client=>["hmac-sha1", "hmac-md5", "hmac-sha1-96", "hmac-md5-96", "hmac-sha2-256", "hmac-sha2-512", "hmac-sha2-256-96", "hmac-sha2-512-96", "none"], :compression_server=>["zlib@openssh.com", "zlib", "none"], :compression_client=>["zlib@openssh.com", "zlib", "none"], :language_server=>[], :language_client=>[]}, @initialized=true, @pending=false, @server_packet="\x14\xDE\xBB\a$w\xD9\xF5.\xF9\xF3\xC7\xE6\x83[>g\x00\x00\x00~diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1\x00\x00\x00\x0Fssh-rsa,ssh-dss\x00\x00\x00\x9Daes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se\x00\x00\x00\x9Daes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se\x00\x00\x00ihmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96\x00\x00\x00ihmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96\x00\x00\x00\x15none,zlib@openssh.com\x00\x00\x00\x15none,zlib@openssh.com\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", @client_packet="\x14\xDA\xEE\xD9\xDD\xA0\x1C_\xAE\xF9G\x95\x86)uR\x8A\x00\x00\x00bdiffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha256\x00\x00\x00\x0Fssh-rsa,ssh-dss\x00\x00\x00\x82aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,idea-cbc,none,arcfour128,arcfour256\x00\x00\x00\x82aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,idea-cbc,none,arcfour128,arcfour256\x00\x00\x00nhmac-sha1,hmac-md5,hmac-sha1-96,hmac-md5-96,hmac-sha2-256,hmac-sha2-512,hmac-sha2-256-96,hmac-sha2-512-96,none\x00\x00\x00nhmac-sha1,hmac-md5,hmac-sha1-96,hmac-md5-96,hmac-sha2-256,hmac-sha2-512,hmac-sha2-256-96,hmac-sha2-512-96,none\x00\x00\x00\x1Azlib@openssh.com,zlib,none\x00\x00\x00\x1Azlib@openssh.com,zlib,none\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", @facility="net.ssh.transport.algorithms[8053962c]", @server_data={:raw=>"\x14\xDE\xBB\a$w\xD9\xF5.\xF9\xF3\xC7\xE6\x83[>g\x00\x00\x00~diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1\x00\x00\x00\x0Fssh-rsa,ssh-dss\x00\x00\x00\x9Daes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se\x00\x00\x00\x9Daes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se\x00\x00\x00ihmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96\x00\x00\x00ihmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96\x00\x00\x00\x15none,zlib@openssh.com\x00\x00\x00\x15none,zlib@openssh.com\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", :kex=>["diffie-hellman-group-exchange-sha256", "diffie-hellman-group-exchange-sha1", "diffie-hellman-group14-sha1", "diffie-hellman-group1-sha1"], :host_key=>["ssh-rsa", "ssh-dss"], :encryption_client=>["aes128-ctr", "aes192-ctr", "aes256-ctr", "arcfour256", "arcfour128", "aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "arcfour", "rijndael-cbc@lysator.liu.se"], :encryption_server=>["aes128-ctr", "aes192-ctr", "aes256-ctr", "arcfour256", "arcfour128", "aes128-cbc", "3des-cbc", "blowfish-cbc", "cast128-cbc", "aes192-cbc", "aes256-cbc", "arcfour", "rijndael-cbc@lysator.liu.se"], :hmac_client=>["hmac-md5", "hmac-sha1", "umac-64@openssh.com", "hmac-ripemd160", "hmac-ripemd160@openssh.com", "hmac-sha1-96", "hmac-md5-96"], :hmac_server=>["hmac-md5", "hmac-sha1", "umac-64@openssh.com", "hmac-ripemd160", "hmac-ripemd160@openssh.com", "hmac-sha1-96", "hmac-md5-96"], :compression_client=>["none", "zlib@openssh.com"], :compression_server=>["none", "zlib@openssh.com"], :language_client=>[], :language_server=>[]}, @kex="diffie-hellman-group-exchange-sha1", @host_key="ssh-rsa", @encryption_client="aes128-cbc", @encryption_server="aes128-cbc", @hmac_client="hmac-sha1", @hmac_server="hmac-sha1", @compression_client="zlib@openssh.com", @compression_server="zlib@openssh.com", @language_client="", @language_server="", @session_id="\x80\xE0i\x04\xA6P\xD5\xD4\xF6\r\x1F+\xB5\x93\x91[\xFF\xAC\xC5\xA6">>, @options={:compression=>["zlib@openssh.com", "zlib"], :user=>"root", :password=>"toto1234", :verbose=>:debug, :logger=>#<Logger:0x00000100a6e540 @progname=nil, @level=0, @default_formatter=#<Logger::Formatter:0x00000100a6e518 @datetime_format=nil>, @formatter=nil, @logdev=#<Logger::LogDevice:0x00000100a6e4c8 @shift_size=nil, @shift_age=nil, @filename=nil, @dev=#<IO:<STDERR>>, @mutex=#<Logger::LogDevice::LogDeviceMutex:0x00000100a6e4a0 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Mutex:0x00000100a6e450>>>>}, @channel_id_counter=-1, @channels={}, @listeners={#<TCPSocket:fd 5>=>nil}, @pending_requests=[], @channel_open_handlers={}, @on_global_request={}, @properties={}> 
1.9.3-p125 :003 > sftp = ssh.sftp.connect
D, [2012-03-05T10:32:09.679665 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 7 type 120 len 44
D, [2012-03-05T10:32:09.679978 #58001] DEBUG -- tcpsocket[8053adc4]: sent 68 bytes
D, [2012-03-05T10:32:09.684948 #58001] DEBUG -- tcpsocket[8053adc4]: read 52 bytes
D, [2012-03-05T10:32:09.685179 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 7 type 91 len 28
I, [2012-03-05T10:32:09.685362 #58001]  INFO -- net.ssh.connection.session[805027bc]: channel_open_confirmation: 0 0 0 32768
D, [2012-03-05T10:32:09.685464 #58001] DEBUG -- net.sftp.session[804feaf4]: requesting sftp subsystem
I, [2012-03-05T10:32:09.685571 #58001]  INFO -- net.ssh.connection.channel[804fea40]: sending channel request "subsystem"
D, [2012-03-05T10:32:09.685785 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 8 type 74 len 44
D, [2012-03-05T10:32:09.685933 #58001] DEBUG -- tcpsocket[8053adc4]: sent 68 bytes
D, [2012-03-05T10:32:09.704760 #58001] DEBUG -- tcpsocket[8053adc4]: read 88 bytes
D, [2012-03-05T10:32:09.705096 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 8 type 93 len 28
I, [2012-03-05T10:32:09.705211 #58001]  INFO -- net.ssh.connection.session[805027bc]: channel_window_adjust: 0 +2097152
D, [2012-03-05T10:32:09.705366 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 9 type 99 len 12
I, [2012-03-05T10:32:09.705450 #58001]  INFO -- net.ssh.connection.session[805027bc]: channel_success: 0
D, [2012-03-05T10:32:09.705515 #58001] DEBUG -- net.sftp.session[804feaf4]: sftp subsystem successfully started
D, [2012-03-05T10:32:09.705797 #58001] DEBUG -- tcpsocket[8053adc4]: queueing packet nr 9 type 138 len 28
D, [2012-03-05T10:32:09.705948 #58001] DEBUG -- tcpsocket[8053adc4]: sent 52 bytes
D, [2012-03-05T10:32:09.737610 #58001] DEBUG -- tcpsocket[8053adc4]: read 100 bytes
D, [2012-03-05T10:32:09.737902 #58001] DEBUG -- tcpsocket[8053adc4]: received packet nr 10 type 94 len 76
I, [2012-03-05T10:32:09.738019 #58001]  INFO -- net.ssh.connection.session[805027bc]: channel_data: 0 99b
D, [2012-03-05T10:32:09.738163 #58001] DEBUG -- net.sftp.session[804feaf4]: received sftp packet 2 len 95
D, [2012-03-05T10:32:09.738224 #58001] DEBUG -- net.sftp.session[804feaf4]: negotiating sftp protocol version, mine is 6
D, [2012-03-05T10:32:09.738278 #58001] DEBUG -- net.sftp.session[804feaf4]: server reports sftp version 3
I, [2012-03-05T10:32:09.738343 #58001]  INFO -- net.sftp.session[804feaf4]: negotiated version is 3
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