in reply to Re^2: Help Required - Problem Automating SFTP
in thread Help Required - Problem Automating SFTP
Run a couple of tests using scp and sftp commands with the verbose flag (-v) and post here the output.
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Re^4: Help Required - Problem Automating SFTP
by Kraythorne (Sexton) on Jan 28, 2009 at 16:18 UTC | |
Connecting to *Host_IP*... debug1: Reading configuration data /etc/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to *Host_IP* *Host_IP* port *Port*. debug1: Connection established. debug3: Not a RSA1 key file C:\\id_cmf_mediatech. 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 debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file C:\\id_cmf_mediatech type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1 debug1: match: OpenSSH_5.1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit: none,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-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_init: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug2: mac_init: found hmac-md5 debug1: kex: client->server aes128-cbc 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: 122/256 debug2: bits set: 517/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: filename /home/.ssh/known_hosts debug3: check_host_in_hostfile: match line 1 debug1: Host '*Host_IP*' is known and matches the RSA host key. debug1: Found key in /home/.ssh/known_hosts:1 debug2: bits set: 520/1024 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: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: C:\\id_cmf_mediatech (0x0) debug1: Authentications that can continue: publickey,gssapi-with-mic,password debug3: start over, passed a different list publickey,gssapi-with-mic,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: Trying private key: C:\\id_cmf_mediatech debug1: read PEM private key done: type RSA debug3: sign_and_send_pubkey debug2: we sent a publickey packet, wait for reply debug1: Authentication succeeded (publickey). debug2: fd 4 setting O_NONBLOCK debug2: fd 5 setting O_NONBLOCK debug1: channel 0: new client-session debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: ssh_session2_setup: id 0 debug1: Sending subsystem: sftp-server debug2: channel 0: request subsystem debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 Request for subsystem 'sftp-server' failed on channel 0 Connection closed If I don't put in the '-s sftp-server' switch the debug ends: debug1: Entering interactive session. debug2: callback start debug2: ssh_session2_setup: id 0 debug1: Sending subsystem: sftp debug2: channel 0: request subsystem debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 Request for subsystem 'sftp' failed on channel 0 Connection closed Any Thoughts? | [reply] |
by Kraythorne (Sexton) on Jan 28, 2009 at 16:59 UTC | |
exec: cp: Not Found Is that cos I'm using windows - searching the web makes it look like these are unix commands that I don't have installed? | [reply] |
by salva (Canon) on Jan 28, 2009 at 17:14 UTC | |
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by Kraythorne (Sexton) on Jan 30, 2009 at 11:28 UTC | |
This is the information I have back from the client: 'We restrict external logins to sftp connections only and chroot the users into their home directories, i.e. you don’t see “/home/mediatech” when you log in, you just see “/”. Now the problem arises when you are chrooted, in this case the command line sftp won’t connect, when you are not chrooted command line sftp works fine. Unfortunately this server is shared with other external customers so it is considered good practice to have all accounts chrooted. I can’t find anything about why this is the case or how to fix it but I have found that psftp (command line sftp that comes with Putty) works. As far as I can see psftp is a generic command line sftp client that does everything Openssh sftp does. I assume that it would integrate into Perl scripts exactly the same as sftp would.' So my question is - Can I get Net::SFTP::Foreign to work with Putty psftp? If not is there another module I could use? Thanks | [reply] |
by salva (Canon) on Jan 30, 2009 at 11:52 UTC | |
Just to test that this is the case, what happens if you run these commands...? Does anyone of them hangs (that means that the sftp-server is listening) instead of exiting with an error? Once you find how to launch the remote sftp-server, tell Net::SFTP::Foreign to use the same command with the open2_cmd constructor option. For instance:
update: and BTW, I think the root of the problem is an incomplete chroot'ed configuration for sshd in the remote side. Probably, they have not configured sshd to use internal-sftp server for the SFTP subsystem. Ask them to check that the sshd_config file contains the following line: (a how-to: http://www.debian-administration.org/articles/590) | [reply] [d/l] [select] |
by Kraythorne (Sexton) on Jan 30, 2009 at 12:30 UTC | |
Offered public key Offer of public key accepted Authenticating with public key "rsa-key-20081029" Access granted Opened channel for session Allocated pty (ospeed 38400bps, ispeed 38400bps Started a shell/command ..and when I break out of it I get: Sent EOF message ^C So it looks like that works However, when I put the same syntax into Net::SFTP::Foreign, after the shell starts, I get: Server exited on signal "INT" Disconnected: All channels closed Are we getting closer? | [reply] |
by salva (Canon) on Jan 30, 2009 at 12:36 UTC | |
by Kraythorne (Sexton) on Jan 30, 2009 at 13:17 UTC | |
C:\Program Files\PuTTY>plink *mycompany@host* -P *port* -v -i c:/id_cmf_mediatech.ppk sftp-server Looking up host "*host_IP*" Connecting to *host_IP* port *port* Server version: SSH-2.0-OpenSSH_5.1 We claim version: SSH-2.0-PuTTY_Release_0.60 Using SSH protocol version 2 Doing Diffie-Hellman group exchange Doing Diffie-Hellman key exchange with hash SHA-256 Host key fingerprint is: ssh-rsa 2048 *FINGERPRINT* Initialised AES-256 SDCTR client->server encryption Initialised HMAC-SHA1 client->server MAC algorithm Initialised AES-256 SDCTR server->client encryption Initialised HMAC-SHA1 server->client MAC algorithm Reading private key file "c:/id_cmf_mediatech.ppk" Using username "mediatech". Offered public key Offer of public key accepted Authenticating with public key "rsa-key-20081029" Access granted Opened channel for session Started a shell/command *HANGS HERE UNTIL I BREAK* Sent EOF message ^C Net::SFTP::Foreign code: #228 ssh cmd: "c:/program files/putty/plink" *mycompany*@*host* -P *port* -v -i c:\id_cmf_mediatech.ppk sftp-server #228 queueing msg len: 5, code:1, id:3 ... 1 00 00 00 05 01 00 00 00 03 | ......... #228 waiting for message... 1 Looking up host "*host_IP*" Connecting to *host_IP* port *port* Server version: SSH-2.0-OpenSSH_5.1 We claim version: SSH-2.0-PuTTY_Release_0.60 Using SSH protocol version 2 Doing Diffie-Hellman group exchange Doing Diffie-Hellman key exchange with hash SHA-256 Host key fingerprint is: ssh-rsa 2048 *fingerprint* Initialised AES-256 SDCTR client->server encryption Initialised HMAC-SHA1 client->server MAC algorithm Initialised AES-256 SDCTR server->client encryption Initialised HMAC-SHA1 server->client MAC algorithm Reading private key file "c:\id_cmf_mediatech.ppk" Using username "mediatech". Offered public key Offer of public key accepted Authenticating with public key "rsa-key-20081029" Access granted Opened channel for session Started a shell/command #228 got it!, len:95, code:2, id:3, status: - 02 00 00 00 03 00 00 00 18 70 6f 73 69 78 2d 72 65 6e 61 6d 65 40 6f 70 65 6e 73 73 68 2e 63 6f | .........posix-rename@openssh.co 6d 00 00 00 01 31 00 00 00 13 73 74 61 74 76 66 73 40 6f 70 65 6e 73 73 68 2e 63 6f 6d 00 00 00 | m....1....statvfs@openssh.com... 01 32 00 00 00 14 66 73 74 61 74 76 66 73 40 6f 70 65 6e 73 73 68 2e 63 6f 6d 00 00 00 01 32 | .2....fstatvfs@openssh.com....2 #228 Net::SFTP::Foreign=HASH(0x226e20)->DESTROY called (current pid: 228, discon nect_by_pid: ) #228 Net::SFTP::Foreign=HASH(0x226e20)->disconnect called (ssh pid: 3028) #228 _conn_lost #228 _set_status code: 7, str: Connection lost #228 _set_err code: 37, str: Connection to remote server is broken | [reply] |
by salva (Canon) on Jan 30, 2009 at 13:29 UTC | |
by Kraythorne (Sexton) on Jan 30, 2009 at 13:56 UTC | |
Yep, just calling the constructor at the mo, I need to get into how the module works a bit more now I know it's working! ...a nice bit of code. Thanks!! By the way, is there a 'move' method in Net::SFTP::Foreign module so that you can move files from one directory on the FTP site to another? | [reply] |
by salva (Canon) on Jan 28, 2009 at 16:32 UTC | |
But as you have said that FileZilla works, maybe they are allowing scp, so just try it! | [reply] |
by Kraythorne (Sexton) on Jan 28, 2009 at 18:03 UTC | |
*Host_IP*:c:/test.txt Looking up host "*host_IP*" Connecting to *host_IP port *port* Server version: SSH-2.0-OpenSSH_5.1 We claim version: SSH-2.0-PuTTY_Release_0.60 Using SSH protocol version 2 Doing Diffie-Hellman group exchange Doing Diffie-Hellman key exchange with hash SHA-256 Host key fingerprint is: ssh-rsa 2048 *fingerprint* Initialised AES-256 SDCTR client->server encryption Initialised HMAC-SHA1 client->server MAC algorithm Initialised AES-256 SDCTR server->client encryption Initialised HMAC-SHA1 server->client MAC algorithm Reading private key file "c:/id_cmf_mediatech.ppk" Using username "*mycompany*". Offered public key Offer of public key accepted Authenticating with public key "rsa-key-20081029" Access granted Opened channel for session Primary command failed; attempting fallback Started a shell/command Using SCP1 Connected to *host_IP* Ok, this looks like it can get me a connection - how can I use this with Net::SFTP::Foreign to automate file downloads and moving files on the clients FTP site? | [reply] |
by salva (Canon) on Jan 28, 2009 at 20:34 UTC | |
If all you are allowed to do is to scp there, then you can try Net::SSH2, Net::SSH::Perl or Net::SCP, though, as you are using keys for authentication, probably just calling the scp (or pscp) program from Perl would be the simplest solution. Also, take into account that scp is very limiting and will allow you to transfer files from one side to the other only. For instance, you will not be able to move files around on the server (update: oh, well, unless they allow you to run any remote command and not just scp in client mode). | [reply] [d/l] [select] |