Mdthbs

I am trying to send/receive a file using TFTP from the network switch to ubuntu(VirtualBox on Windows 10 Pro), but getting an error code 5

By following the steps mentioned below it seems like my localhost is working with TFTP server, I can send and receive the file using localhost:

/home/abc# tftp localhost



tftp> put test



Sent 16 bytes in 0.0 seconds



tftp> get test



Received 16 bytes in 0.0 seconds

Note: However, I observed the time is not changing when I use put and get

root@abc:/home/abc# ls -l /var/lib/tftpboot/

total 4

-rwxrwxrwx 1 root root 14 Sep  6 ***18:03*** test

When I used the command in the switch to send/receive the file then I get the error message:

Trivial File Transfer Protocol

Opcode: Error Code (5)

[Destination File: test]

Error code: Access violation (2)

Error message: Access violation

[Expert Info (Warning/Response): TFTP ERROR packet]

[TFTP ERROR packet]

[Severity level: Warning]

[Group: Response]

Would you please guide me on how to fix this issue?

https://icesquare.com/wordpress/how-to-setup-tftp-on-ubuntu/

First, let’s install all the necessary packages:

sudo apt-get install xinetd tftpd tftp -y

Next, we need to create a configuration file:

sudo nano /etc/xinetd.d/tftp

Put the following content into the file.

service tftp

{

   protocol = udp

   port = 69

   socket_type = dgram

   wait = yes

   user = nobody

   server = /usr/sbin/in.tftpd

   server_args = var/lib/tftpboot -s

   disable = no

}

In the server_args, I have var/lib/tftpboot, which represents the location of the tftp root, i.e., /var/lib/tftpboot. Notice that I skip the root /.

Now let’s change the ownership of the directory:

sudo mkdir /var/lib/tftpboot

sudo chown -R nobody:nobody /var/lib/tftpboot

sudo chmod -R 777 /var/lib/tftpboot

and start the TFTP service:

sudo service xinetd stop

sudo service xinetd start

Verify the TFTP is running correctly or not:

netstat -na | grep LIST | grep 69

You should see something like this:

tcp        0      0 0.0.0.0:69              0.0.0.0:*     LISTEN

Test: Upload a file to TFTP Server
Now let’s test the TFTP server by logging into the server first:

tftp localhost
and upload a file:

tftp> put myfile.jpg

Sent 56733279 bytes in 5.7 seconds

Quit:

q

Make sure that file has been uploaded:

ls -l /var/lib/tftpboot

Test: Download a file from TFTP Server
Now, let’s go to a different directory and download the file we just upload.

cd some_other_directory

and log in to the tftp server again:

tftp localhost

and get the file:

tftp> get myfile.jpg

Received 56733279 bytes in 5.7 seconds