I am trying to connect my parse server instance but I keep getting this error on my terminal even though I have not changed the lines below
/Users/candilikoglu/.ssh/config: line 82: Bad configuration option: usepam
/Users/candilikoglu/.ssh/config: line 106: Bad configuration option: acceptenv
/Users/candilikoglu/.ssh/config: line 112: Bad configuration option: subsystem
/Users/candilikoglu/.ssh/config: terminating, 4 bad configuration options
Cans-MacBook-Pro:desktop candilikoglu$
Related
Airflow version: 2.0.0
When I use the sftp command to manually connect to the host from any airflow worker everything works fine. Here is the error log from when I try to use the operator which under the hood uses the paramiko library to transfer files:
{ssh.py:202} WARNING - No Host Key Verification. This wont protect against Man-In-The-Middle attacks
{transport.py:1819} INFO - Connected (version 2.0, client 1.91)
{transport.py:1819} INFO - Auth banner: b'MOMENTUM SYSTEMS - SSH Server\nAuthentication Methods Supported:\nPUBLICKEY, PASSWORD'
{transport.py:1819} INFO - Authentication continues...
{transport.py:1819} INFO - Disconnect (code 2): unexpected service request
{taskinstance.py:1396} ERROR - Authentication failed.
Traceback (most recent call last):
File "/home/centos/.local/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1086, in _run_raw_task
self._prepare_and_execute_task_with_callbacks(context, task)
File "/home/centos/.local/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1260, in _prepare_and_execute_task_with_callbacks
result = self._execute_task(context, task_copy)
File "/home/centos/.local/lib/python3.7/site-packages/airflow/models/taskinstance.py", line 1300, in _execute_task
result = task_copy.execute(context=context)
File "/home/centos/airflow-dags/utils/operators/s3_to_sftp.py", line 76, in execute
sftp_client = ssh_hook.get_conn().open_sftp()
File "/home/centos/.local/lib/python3.7/site-packages/airflow/providers/ssh/hooks/ssh.py", line 225, in get_conn
client.connect(**connect_kwargs)
File "/home/centos/.local/lib/python3.7/site-packages/paramiko/client.py", line 446, in connect
passphrase,
File "/home/centos/.local/lib/python3.7/site-packages/paramiko/client.py", line 764, in _auth
raise saved_exception
File "/home/centos/.local/lib/python3.7/site-packages/paramiko/client.py", line 751, in _auth
self._transport.auth_password(username, password)
File "/home/centos/.local/lib/python3.7/site-packages/paramiko/transport.py", line 1509, in auth_password
return self.auth_handler.wait_for_response(my_event)
File "/home/centos/.local/lib/python3.7/site-packages/paramiko/auth_handler.py", line 236, in wait_for_response
raise e
paramiko.ssh_exception.AuthenticationException: Authentication failed.
The Airflow connection that I use has the password and no additional options in extra.
The answer provided to the linked question worked for my use case:
Multi-factor authentication (password and key) with Paramiko
I want use the python library ncclient 0.6.6 with Python 2.7.15 to connect to a NETCONF server (netopeer2) and read out the running config.
I tried to follow the example from the manual, running this code in the console:
with manager.connect(host="*the IP adress*", port=*the port*, timeout=None, username="*user*", password="*pwd*") as m:
c = m.get_config(source='running').data_xml
with open("%s.xml" % host, 'w') as f:
f.write(c)
As written in the manual, I try to disable public-key authentification with allow_agent and look_for_keys as False. Unfortunately, this does not work properly, because I get the error message:
File "<stdin>", line 1, in <module>
File "/home/sisc/.local/lib/python2.7/site-packages/ncclient/manager.py", line 177, in connect
return connect_ssh(*args, **kwds)
File "/home/sisc/.local/lib/python2.7/site-packages/ncclient/manager.py", line 143, in connect_ssh
session.connect(*args, **kwds)
File "/home/sisc/.local/lib/python2.7/site-packages/ncclient/transport/ssh.py", line 481, in connect
raise SSHUnknownHostError(known_hosts_lookup, fingerprint)
ncclient.transport.errors.SSHUnknownHostError: Unknown host key [e3:8d:35:a9:43:f9:3c:8a:f4:d3:88:5b:a9:36:93:59] for [[192.168.56.2]:1831]
I do not get why it still complains about the unknown host key, even though I explicitly disabled public-key authentification.
The netopeer NETCONF server is definitely running, for I get a "Hello" Message as soon as I try to SSH into it from out of the terminal.
Did I miss something?
m = manager.connect(host="172.17.0.2", port=830, username="netconf", password="netconf", hostkey_verify=False)
Did the trick. Hostkey_verify has to be false.
I have got this error when we configure and restart apache ? Invalid command 'PerlRequire', perhaps misspelled or defined by a module not included in the server configuration Action 'configtest' failed. The Apache error log may have more information. ...fail! –
I encountered the following perculiar behaviour today.
The following code works on Python 3.3:
smtp = smtplib.SMTP()
smtp.connect(host="smtp.gmail.com", port=587)
smtp.ehlo()
smtp.starttls()
In Python 3.4 the above code doesn't work, instead the following error is encountered:
File "smtp_test.py", line 10, in <module>
smtp.starttls()
File "/usr/lib/python3.4/smtplib.py", line 676, in starttls
server_hostname=server_hostname)
File "/usr/lib/python3.4/ssl.py", line 344, in wrap_socket
_context=self)
File "/usr/lib/python3.4/ssl.py", line 540, in __init__
self.do_handshake()
File "/usr/lib/python3.4/ssl.py", line 767, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: TLSV1_ALERT_DECODE_ERROR] tlsv1 alert decode error (_ssl.c:598)
If the above code is modified to specify the host and port in the constructor and not use the connect method, as in the code below, then it works.
smtp = smtplib.SMTP(host="smtp.gmail.com", port=587)
smtp.ehlo()
smtp.starttls()
The above behaviour occurs with OpenSSL version 1.0.1f and OpenSSL 1.0.1g
Could someone explain this behaviour to me ?
According to a tcpdump the code in 3.4 sends in SNI extension with an empty target name. SNI (Server Name Indication) is used when having different certificates behind the same IP address. I consider this a bug: if it does not have a name it should not send the SNI extension instead of sending an extension with a zero-length name in it.
My config file:
Host server
User new_user
HostName 10.0.1.193
Port 55555
LocalForward 3000 10.0.1.193:6000
IdentityFile ~/.ssh/server
Client.py
import xmlrpclib
s = xmlrpclib.ServerProxy('http://localhost:3000')
print s.pow(2,3) # Returns 2**3 = 8
print s.add(2,3) # Returns 5
print s.div(5,2) # Returns 5//2 = 2
# Print list of available methods
print s.system.listMethods()
Server.py
from SimpleXMLRPCServer import SimpleXMLRPCServer
from SimpleXMLRPCServer import SimpleXMLRPCRequestHandler
# Restrict to a particular path.
class RequestHandler(SimpleXMLRPCRequestHandler):
rpc_paths = ('/RPC2',)
# Create server
server = SimpleXMLRPCServer(("localhost", 6000),
requestHandler=RequestHandler)
server.register_introspection_functions()
# Register pow() function; this will use the value of
# pow.__name__ as the name, which is just 'pow'.
server.register_function(pow)
# Register a function under a different name
def adder_function(x,y):
return x + y
server.register_function(adder_function, 'add')
# Register an instance; all the methods of the instance are
# published as XML-RPC methods (in this case, just 'div').
class MyFuncs:
def div(self, x, y):
return x // y
server.register_instance(MyFuncs())
# Run the server's main loop
server.serve_forever()
My server.py is running fine, but when I run my client.py, it gives the following error:
Traceback (most recent call last):
File "client.py", line 4, in <module>
print s.pow(2,3) # Returns 2**3 = 8
File "/usr/lib/python2.7/xmlrpclib.py", line 1224, in __call__
return self.__send(self.__name, args)
File "/usr/lib/python2.7/xmlrpclib.py", line 1578, in __request
verbose=self.__verbose
File "/usr/lib/python2.7/xmlrpclib.py", line 1264, in request
return self.single_request(host, handler, request_body, verbose)
File "/usr/lib/python2.7/xmlrpclib.py", line 1292, in single_request
self.send_content(h, request_body)
File "/usr/lib/python2.7/xmlrpclib.py", line 1439, in send_content
connection.endheaders(request_body)
File "/usr/lib/python2.7/httplib.py", line 954, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 814, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 776, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 757, in connect
self.timeout, self.source_address)
File "/usr/lib/python2.7/socket.py", line 571, in create_connection
raise err
socket.error: [Errno 111] Connection refused
I have checked that my ssh if working and I can ssh into remote server with the given configuration i.e.
ssh server
works find. Can anyone explain what might be going wrong?
Your server runs and perhaps it does not complain, but this does not mean it "runs correctly" or more pointedly it doesn't mean the server is in a working state that the client expects.
The above is somewhat cryptic for a reason: something unknown has gone wrong, and even though you don't know yet what's broken, you want to start testing things you know should work and verify they are in fact working. This is a useful debugging skill even if the error is meaningless to you.
In this case, the client error message is "connection refused", meaning "refused [at the server]".
Try this:
on your "client" PC in a Terminal/DOS window, run:
telnet [your server ip] [your server port]
You should expect the same error - a connection refused. Perhaps the server is not actually opening the port. Or perhaps the server opened the port, but you can not see it remotely on another host due to a firewall on the server.
Also, running both client and server code on the same host can sometime reveal more clues (it should work but if it doesn't then there's maybe more than 1 problem).