Ytdyklly

I need the correct syntax of tftp to get and put file. My ultimate goal is using busybox tftp (this should be second question), but it failed even trying to test with local Ubuntu tftp client.

As you can see below, ftp no issue, only tftp has issue. And this is loopback ip so shouldn't related to iptables (Again, ftp no issue). To prevent potential long path issue, I test with only home directory.

xb@dnxb:/tmp$ grep anon_root /etc/vsftpd.conf

anon_root=/home/xiaobai/

xb@dnxb:/tmp$ cat /home/xiaobai/haha

7

xb@dnxb:/tmp$ ftp 127.0.0.1

Connected to 127.0.0.1.

220 (vsFTPd 3.0.3)

Name (127.0.0.1:xiaobai): anonymous

331 Please specify the password.

Password:

230 Login successful.

Remote system type is UNIX.

Using binary mode to transfer files.

ftp> get haha

local: haha remote: haha

200 PORT command successful. Consider using PASV.

150 Opening BINARY mode data connection for haha (2 bytes).

226 Transfer complete.

2 bytes received in 0.00 secs (6.5541 kB/s)

ftp> 221 Goodbye.

xb@dnxb:/tmp$ tftp 127.0.0.1

tftp> get haha

Error code 1: File not found

tftp> get /home/xiaobai/haha

Error code 1: File not found

tftp> get /home/xiaobai/haha output

Error code 1: File not found

tftp> put /home/xiaobai/haha        

Error code 1: File not found

tftp> put haha

Error code 1: File not found

tftp> xb@dnxb:/tmp$ dpkg-query -W -f='${Description}nn${Homepage}nMaintainer: ${Maintainer}nn' tftp

Trivial file transfer protocol client

 Tftp is the user interface to the Internet TFTP (Trivial File Transfer

 Protocol), which allows users to transfer files to and from a remote machine.

 The remote host may be specified on the command line, in which case tftp uses

 host as the default host for future transfers.



http://www.hcs.harvard.edu/~dholland/computers/netkit.html

Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>



xb@dnxb:/tmp$

Then I folllow this answer:

xb@dnxb:/tmp$ tftp -v 127.0.0.1 -c get haha

usage: tftp host-name [port]

tftp> xb@dnxb:/tmp$ 

xb@dnxb:/tmp$ tftp -v 127.0.0.1 -c get /home/xiaobai/haha

usage: tftp host-name [port]

tftp> xb@dnxb:/tmp$ 

xb@dnxb:/tmp$ tftp -v 127.0.0.1 -c put haha

usage: tftp host-name [port]

tftp> xb@dnxb:/tmp$ tftp -v 127.0.0.1 -c put /home/xiaobai/haha

usage: tftp host-name [port]

tftp> ^F

?Invalid command

tftp> xb@dnxb:/tmp$ 

xb@dnxb:/tmp$ 

And also this answer (comment out or not seems not effect, I did do service vsftpd restart after edited):

xb@dnxb:/tmp$ grep server_args /etc/xinetd.conf 

# server_args = -c -s /tftpboot

xb@dnxb:/tmp$ 

It could better if someone can give answer about busybox tftp which has different option:

# busybox tftp                                    

BusyBox v1.22.1 bionic (2017-11-04 12:54 +0800) multi-call binary.



Usage: tftp [OPTIONS] HOST [PORT]



Transfer a file from/to tftp server



        -l FILE Local FILE

        -r FILE Remote FILE

        -g      Get file

        -p      Put file

tftp is usually restricted to /tftpboot directory, I wouldn't expect it to work to get something from a user home directory.

Also check the file permissions. IIRC (it has been awhile), since tftp is unauthenticated files need to be world readable.