CODEWITHSUNDEEP
pythonsshsftpparamikoopenssh
YohanRoth
YohanRoth

Reputation: 3253

"ssh" proxy command equivalent in Paramiko

I am trying all possible ways to connect to SFTP server --

For this code

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
mykey = paramiko.RSAKey.from_private_key_file("/Users/roth/.ssh/id_rsa", password="XXXX")

I get 

paramiko.ssh_exception.SSHException: Could not deserialize key data.

If I do the following

client = paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname="128.xx.xx.xx", username="roth", passphrase="roth", password="XXXX", key_filename="/Users/roth/.ssh/id_rsa")

I get 

paramiko.ssh_exception.NoValidConnectionsError: [Errno None] Unable to connect to port 22 on 128.xx.xx.xx

I cannot tell why since I can connect using Terminal to SFTP either by using key + passphrase or just password:

ssh -vvv 

OpenSSH_7.5p1, LibreSSL 2.5.4
debug1: Reading configuration data /Users/roth/.ssh/config
debug1: /Users/roth/.ssh/config line 1: Applying options for *
debug1: /Users/roth/.ssh/config line 8: Applying options for 128.30.*
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 52: Applying options for *
debug1: Executing proxy command: exec ssh -W 128.xx.xx.xx:22 jump.xxx.xxx.edu
debug1: permanently_drop_suid: 501
debug1: identity file /Users/roth/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/roth/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.5

Upvotes: 2

Views: 1186

Answers (1)

Martin Prikryl
Martin Prikryl

Reputation: 202272

Executing proxy command: exec ssh -W 128.xx.xx.xx:22 jump.xxx.xxx.edu

Your ssh connects using a jump proxy server (aka SSH tunnel).

To implement a jump server in JSch, see the official JumpHosts.java example.

Btw, there are better ways to connect via jump server in recent versions of OpenSSH than using "proxy command". See How can I download a file from a host I can only SSH to through another host?

Upvotes: 2

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