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POcurl: (2) Failure initializing sftp session: Unable to send SSH_FXP_INIT
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copied!<p>I am using <code>curl</code> on a Red Hat 5.7 server to download files from various companies.</p> <p>But one connection gives me the following error (anonymized):</p> <pre><code>curl -v -u 'anonymous:' sftp://sftp.acme.com/ * About to connect() to sftp.acme.com port 22 (#0) * Trying x.x.x.x... * connected * Connected to sftp.acme.com (x.x.x.x) port 22 (#0) * SSH MD5 fingerprint: 95febe8759c980cd9526ec2b90.... * SSH host check: 0, key: AAAAB3NzaC1yc2EAAAADAQA.... * SSH authentication methods available: publickey,password,keyboard-interactive * Using ssh public key file /home/lanes/.ssh/id_rsa.pub * Using ssh private key file /home/lanes/.ssh/id_rsa * Initialized SSH public key authentication * Authentication complete * Failure initializing sftp session: Unable to send SSH_FXP_INIT * Closing connection #0 curl: (2) Failure initializing sftp session: Unable to send SSH_FXP_INIT </code></pre> <p><code>sftp</code> works fine:</p> <pre><code>sftp anonymous@sftp.acme.com Connecting to sftp.acme.com... ACME File Transfer Prod #1 sftp> quit </code></pre> <p>Has anyone ever seen this <code>SSH_FXP_INIT</code> error?</p> <hr> <pre><code>curl --version curl 7.24.0 (x86_64-redhat-linux-gnu) libcurl/7.24.0 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5 libssh2/1.2.2 Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp Features: IDN IPv6 Largefile NTLM NTLM_WB SSL libz </code></pre> <hr> <p>Verbose <code>sftp</code> output:</p> <pre><code>sftp -v anonymous@sftp.acme.com Connecting to sftp.acme.com... OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to sftp.acme.com [139.149.22.130] port 22. debug1: Connection established. debug1: identity file /home/lanes/.ssh/id_rsa type 1 debug1: identity file /home/lanes/.ssh/id_dsa type -1 debug1: loaded 2 keys debug1: Remote protocol version 2.0, remote software version SSHD debug1: no match: SSHD debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.3 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none debug1: kex: client->server aes128-cbc hmac-md5 none debug1: sending SSH2_MSG_KEXDH_INIT debug1: expecting SSH2_MSG_KEXDH_REPLY debug1: Host 'sftp.acme.com' is known and matches the RSA host key. debug1: Found key in /home/lanes/.ssh/known_hosts:23 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received UBS File Transfer Prod #2 debug1: Authentications that can continue: publickey,password,keyboard-interactive debug1: Next authentication method: publickey debug1: Offering public key: /home/lanes/.ssh/id_rsa debug1: Server accepts key: pkalg ssh-rsa blen 277 debug1: read PEM private key done: type RSA debug1: Authentication succeeded (publickey). debug1: channel 0: new [client-session] debug1: Entering interactive session. debug1: Sending environment. debug1: Sending env LANG = en_US.UTF-8 debug1: Sending subsystem: sftp </code></pre>

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