I have created an FTP client using ftplib. I am running the server on one of my Ubuntu virtual machine and client on another. I want to connect to the server using ftplib and I'm doing it in the following way:
host = "IP address of the server"
port = "Port number of the server"
ftpc = FTP()
ftpc.connect(host, port)
I'm getting the following error!
Traceback (most recent call last):
File "./client.py", line 54, in <module>
ftpc.connect(host, port)
File "/usr/lib/python2.7/ftplib.py", line 132, in connect
self.sock = socket.create_connection((self.host, self.port), self.timeout)
File "/usr/lib/python2.7/socket.py", line 571, in create_connection
raise err
socket.error: [Errno 111] Connection refused
When I went through the docs of python, I could see ftplib used only with domain names as in FTP("domain name"). Can I use IP address instead of domain name? In my case I am unable to comprehend the error. It would be great if anyone can help me out.
Also if I use port 21 on my server, I'm getting socket error: Connection refused. How do I use port 21 for my FTP server?
Thank You.
It seems like you are trying to connect to SFTP server using ftplib which is giving you the Connection Refused error. Try using pysftp instead of ftplib and see if it works.
On the virtual machine, test by typing ftp and sftp commands on the console. You will get to know on which server the machine is running i.e ftp or sftp.
To solve the problem, I install and config vsftpd:
sudo apt install vsftpd (if not exist)
sudo vim /etc/vsftpd.conf
set "listen=YES"
Related
I'm trying to setup an FTP TLS transfer. I have scripts for strict FTP and for SFTP, but this is my first exposure to TLS. My basic script:
import ftplib
import ssl
ctx = ssl._create_stdlib_context(ssl.PROTOCOL_TLSv1_2)
ftps = ftplib.FTP_TLS(context=ctx)
print (ftps.connect(myhost,21))
print(ftps.login(myusername,mypwd))
print("1")
ftps.prot_p()
print("2")
print (ftps.retrlines('LIST'))
print("3")
Error:
[WinError 10054] An existing connection was forcibly closed by the remote host
This error occurs at the retrlines line. It says the error is in ssl.py at do_handshake self._sslobj.do_handshake().
I've already verified the connection with WinSCP, and that the protocol is TLS1.2.
Any ideas?
Well, the issue turned out to be that the vendor was only allowing access from a specific machine. Once I tried the script on the correct machine, it worked.
I'm doing lab in Malware analysis.
The task is to investigate CVE-2015-7547 glibc vulnerability.
Google already gave proof of concept code. This code contains client in C and fake DNS server in python. When I try to run server, it throws exception:
turbolab#sandbox:~/Desktop$ sudo python CVE-2015-7547-poc.py
Traceback (most recent call last):
File "CVE-2015-7547-poc.py", line 176, in <module>
tcp_thread()
File "CVE-2015-7547-poc.py", line 101, in tcp_thread
sock_tcp.bind((IP, 53))
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use
IP was set to 127.0.0.1.
How to run server and connect client to it?
You could run netstat -lpn to list all listening connections, with pids (-n do not resolve names).
To test for this vulnerability
Clone the POC code git clone https://github.com/fjserna/CVE-2015-7547.git
Set your DNS server to localhost (127.0.0.1) edit /etc/resolv.conf
Run the POC DNS server
sudo python CVE-2015-7547-poc.py
Compile the client
make
Run the client
./CVE-2015-7547-client
CVE-2015-7547-client segfaults when you are vulnerable
CVE-2015-7547-client reports CVE-2015-7547-client: getaddrinfo: Name or service not known when not vulnerable.
See this Ubuntu Security Notice for more information, as well the original Google blog
I recently started a single gear application, python 2.7 on Openshift.
I am not being allowed to open a socket -
The Terminal Returned with:
File "server.py", line 21, in <module>
server_socket.bind(("0.0.0.0", PORT))
File "/opt/rh/python27/root/usr/lib64/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 13] Permission denied
I just need a small socket up and running - does anyone know how I can open a socket on their hosting? If not, what is a good alternative solution so that I can host and open my own python sockets?
you need to bind to your gear's ip address, which on python cartridge i believe is OPENSHIFT_PYTHON_IP, you can't bind to 0.0.0.0, also, only applications bound to port 8080 can be accessed from outside of openshift. (ports 80,443,8000,8443 are all routed to port 8080 on your gear)
I'm trying to connect to SSH server in the following way:
import paramiko
import socks
sock = socks.socksocket()
sock.setproxy(socks.PROXY_TYPE_SOCKS5, 'localhost', 22, True)
sock.connect((**IP address of SSH server**, 22))
t = paramiko.Transport(sock)
t.connect( None, 'username', 'password')
And get the following error
> Traceback (most recent call last): ...
> sock.connect((**IP address of SSH server**, 22)) File "C:\Python27\lib\site-packages\socks.py", line 368, in connect
> _orgsocket.connect(self,(self.__proxy[1],portnum)) File "C:\Python27\lib\socket.py", line 224, in meth
> return getattr(self._sock,name)(*args) socket.error: [Errno 10061] No connection could be made because the target machi ne actively
> refused it
My goal is to simulate Putty's way in creating SSH SOCKS Proxy as here:
Configure PuTTY To Create SSH SOCKS Proxy For Secure Browsing.
Or equivalent
ssh -D [localhost]port
for local dynamic application-level port forwarding.
Can someone explain, please, what's wrong and how to do it the right way using paramiko?
Thanks.
P.S.
I've found this https://stackoverflow.com/a/5823383/1264304 However, I don't succeed to implement it. Someone?
Paramiko can natively connect to ssh. You don't need the SOCKS library to connect to the ssh server. Additionally, when you try, the remote server refuses to connect because you don't authenticate.
The proper way to do this would be to connect with paramiko's sshClient:
import paramiko
ssh = paramiko.SSHClient()
ssh.connect('yourServer', username='you',
password='yay!')
And then, get the underlying transport:
trans = ssh.get_transport()
Finally, have the ssh client forward a tcp port with open channel:
trans.open_channel("forwarded-tcpip", dest_addr=('serverIP',8000), src_addr=('localhost'),8000))
This will cause any connections on port 8000 locally to be forwarded to port 8000 remotely across this ssh session.
I have mongodb running on a remote server. I can ssh to the remote server and connect to mongodb from the shell on the remote machine. However i have to connect to that mongodb instance from my python script.
However, im unable to connect to mongodb directly from the shell on my local machine running linux using the command:
mongo <remote_ip>:27017
or through pymongo using
connection = pymongo.Connection("<remote_ip>", 27017)
I get the below error when using pymongo:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "/usr/local/lib/python2.6/dist-packages/pymongo-1.11-py2.6-linux-i686.egg/pymongo/connection.py", line 370, in __init__
self.__find_master()
File "/usr/local/lib/python2.6/dist-packages/pymongo-1.11-py2.6-linux-i686.egg/pymongo/connection.py", line 605, in __find_master
raise AutoReconnect("could not find master/primary")
AutoReconnect: could not find master/primary
What could be causing this problem ?. Does it mean mongo is running on a port other than 27017 and if so how can i find out which port it is running on ?
Please Help
Thank You
You can use netstat -a -p on the machine running mongodb to see what port it's attached to. (netstat -a lists all connections and -p provides the name of the program owning the connection.) Also make sure the remote computer is allowing external connections on that port (the connections aren't being blocked by a firewall) and that mongodb is accepting remote connections.