Paramiko cannot connect to tamte server #2161
Comments
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That's an issue of tmate server settings. Please ask on https://groups.google.com/group/tmate-io. |
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It seems your tmate server requires compression in ssh connection by the settings. I think the settings typically should be configured to accept both with/without |
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It worked, now |
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Your script has something wrong. The transport in the |
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Full script as requested: import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(username="**", hostname="sgp1.tmate.io", compress=True)
print("Connected Succesfully.")
ssh.exec_command("ls")
print("Finished executing first command")
ssh.exec_command("ls")
print("Finished executing second command")Execution results The first execution returns stdin, stdout, stderr like this: In stdout, I see: |
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That is not a paramiko issue. I think it is unable to send any commands to tmate server. The ssh connection to tmate server is used only for terminal sharing. I have no idea about what you want to do with paramiko. Please ask on tmate forum. |
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I guess that tmake server responds |
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What I need to achieve with tmate is SSHing over internet, not just local network. I'm not using it for file transfer. Here is the logfile for the same script. |
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I'm receiving different error now, instead of cosed connection, I get EOF error: Connected Succesfully.
Finished executing first command
---------------------------------------------------------------------------
EOFError Traceback (most recent call last)
Cell In[23], line 13
10 ssh.exec_command("ls")
11 print("Finished executing first command")
---> 13 ssh.exec_command("ls")
14 print("Finished executing second command")
File ~\venvs\ve\lib\site-packages\paramiko\client.py:525, in SSHClient.exec_command(self, command, bufsize, timeout, get_pty, environment)
485 def exec_command(
486 self,
487 command,
(...)
491 environment=None,
492 ):
493 """
494 Execute a command on the SSH server. A new `.Channel` is opened and
495 the requested command is executed. The command's input and output
(...)
523 Added the ``get_pty`` kwarg.
524 """
--> 525 chan = self._transport.open_session(timeout=timeout)
526 if get_pty:
527 chan.get_pty()
File ~\venvs\ve\lib\site-packages\paramiko\transport.py:920, in Transport.open_session(self, window_size, max_packet_size, timeout)
892 def open_session(
893 self, window_size=None, max_packet_size=None, timeout=None
894 ):
895 """
896 Request a new channel to the server, of type ``"session"``. This is
897 just an alias for calling `open_channel` with an argument of
(...)
918 Added the ``window_size`` and ``max_packet_size`` arguments.
919 """
--> 920 return self.open_channel(
921 "session",
922 window_size=window_size,
923 max_packet_size=max_packet_size,
924 timeout=timeout,
925 )
File ~\venvs\ve\lib\site-packages\paramiko\transport.py:1051, in Transport.open_channel(self, kind, dest_addr, src_addr, window_size, max_packet_size, timeout)
1049 if e is None:
1050 e = SSHException("Unable to open channel.")
-> 1051 raise e
1052 if event.is_set():
1053 break
File ~\venvs\ve\lib\site-packages\paramiko\transport.py:2110, in Transport.run(self)
2108 self._send_kex_init()
2109 try:
-> 2110 ptype, m = self.packetizer.read_message()
2111 except NeedRekeyException:
2112 continue
File ~\venvs\ve\lib\site-packages\paramiko\packet.py:459, in Packetizer.read_message(self)
451 def read_message(self):
452 """
453 Only one thread should ever be in this function (no other locking is
454 done).
(...)
457 :raises: `.NeedRekeyException` -- if the transport should rekey
458 """
--> 459 header = self.read_all(self.__block_size_in, check_rekey=True)
460 if self.__etm_in:
461 packet_size = struct.unpack(">I", header[:4])[0]
File ~\venvs\ve\lib\site-packages\paramiko\packet.py:303, in Packetizer.read_all(self, n, check_rekey)
301 x = self.__socket.recv(n)
302 if len(x) == 0:
--> 303 raise EOFError()
304 out += x
305 n -= len(x)
EOFError: |
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You must use Also, it is need to use The following script is to view the shared session on tmate server: import paramiko, os
with paramiko.Transport('sgp1.tmate.io') as transport:
transport.use_compression()
transport.start_client()
transport.auth_none('---- your token here ----')
with transport.open_session() as sess:
sess.set_combine_stderr(True)
sess.get_pty()
sess.invoke_shell()
while sess.active:
while sess.recv_ready():
os.write(1, sess.recv(128)) |
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You should describe what you want to do with paramiko. Otherwise, please close this issue and ask on tmate forum. |
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Ah, it is unable to request |
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Description of what I want to do:
I assumed that whatever is doable via Thanks for the snippet. I'm not sure if it can be streamlined in the future so that it is as simple as |
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What is the status of this, @thisismygitrepo? Did you get this to work? If not, do you have any further information about what features/fixes you might need in paramiko to make it work?
If you still think this would be a helpful change, can you clarify what you mean by "this is handled internally if not passed"? Are you suggesting that |
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@bskinn
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@jun66j5 -- do you know if common SSH implementations will automatically try with and without compression? |
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I'm adding the "Feature" tag to this because it looks to me like there may be additional implementation required in order to make |
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Separately, @thisismygitrepo -- to make sure that searches for 'tmate' can find this ticket, could you fix the typo in the issue name ( |
The OpenSSH client sends kexinit packets to prefer the compression setting, however paramiko with
See also: |
I'm trying to ssh to Tmate, a popular terminal sharing server.
Via ssh, the process is easy:
ssh {user_name}/{sess_name}@sgp1.tmate.ioBut Paramiko doesn't seem to be able to do that.
I get those types of errors:
Is this possible at all?
What is missing here?
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