FTP file transfer failing for .jar into /usr

Ewon Support Ewon Flexy
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#1

I am trying to transfer a custom .jar file into the /usr folder, but the transfer fails with a “Could not start transfer” message in the FTP client. I have tried with both FileZilla and command line FTP and both fail in the same way.
I am logged in as adm, and the .jar file is 89kb. I can successfully transfer a text file of 95kb into the /usr folder without issue.
Firmware is 14.5s1. Any idea what the problem may be?

#2

Have you tried using FTP passive mode?

#3

Yes, below is the session log I attempted from WSL. I can put an empty text file of the exact same size without issue.

scott@PF1W81CL:~$ ftp -p 10.29.140.xxx
Connected to 10.29.140.xxx.
220 FTP Server ready.
230 User logged in.
Remote system type is eWON.
ftp> cd usr
ftp> put AqvClient.jar
local: AqvClient.jar remote: AqvClient.jar
227 Entering passive mode (10,29,140,xxx,140,209)
150 Opening BINARY mode data connection for '/usr/AqvClient.jar'
426 Operation failed
90868 bytes sent in 0.54 secs (165.4531 kB/s)
ftp>

A byte-by-byte copy of the .jar file transfers fine until 70780 bytes have non-zero data.

After some testing, it looks like anything that resembles a binary file is not transferred.
Things that have failed:

  • A 1kb file of random hex data
  • A small 4kb Windows executable

This seems very strange. I would expect any type of file to be transferred.

#4

Yes, any file should be able to be transferred, and I’ve never heard of this problem before, so I’m inclined to believe this is a network issue.

Are you able to test this when connected directly to the Ewon, or do you only have remote access?

#5

I only have remote access at this time.

#6

If you want to open a case at https://support.hms-networks.com, we can help you take a packet capture from the Ewon’s LAN. This may help point to the culprit.

#7

We have physical access today, so we’re going to attempt a transfer while connected directly.

#8

Great! If it works when connected locally, I think the next step would be to take a pcaps from the Ewon when remote. Let me know how it goes. I can send you a utility for taking the pcaps.

#9

FTP transfers failed when connected locally as well. We got the same type of error when attempting to transfer files.

1 Like
#10

Hi Scott,

Thanks for testing that. Can you create a ticket at support.hms-networks.com so I can send you the pcap utility?

#11

I wanted to follow up with the solution that was found for this issue.
It turned out that the eWon local storage was full from logs generated by a local Java application. Formatting the local storage area resolved the transfer problem.

#12

Thanks for the update Scott! Glad you got it figured out!