topic Re: TFTP / Solution for a linux server in ExtremeSwitching (EXOS/Switch Engine)

TFTP / Solution for a linux server

skyvana — Tue, 23 Jul 2019 21:21:10 GMT

hi,

I want to use a TFTP server ( like this for Windows https://extremeportal.force.com/ExtrArticleDetail?an=000081258) but on Linux to upload a file to a switch. I tested several solutions (tftpd-hpa ...), but none works.

Do you know a solutions who work?

Many thanks in advanced

Alex

Re: TFTP / Solution for a linux server

ar1 — Wed, 24 Jul 2019 12:54:18 GMT

Hi Alex,
have you checked that the tftp-server is running (netstat -taup | grep tftpd-hpa)?
Have you checked that no firewall will block the traffic to/from the server?
What show the output of "tail -f /var/log/syslog" or the output of "tail -f /var/log/messages" when you try to receive a file from the server and what is the command you use at the switch to download the file?
Pls. give us a little bit more details.
regards,
Axel

Re: TFTP / Solution for a linux server

skyvana — Wed, 24 Jul 2019 15:41:03 GMT

Re: TFTP / Solution for a linux server

ar1 — Wed, 24 Jul 2019 18:28:47 GMT

Hi Alex,
your output from your first picture shows two process that are running on the tftp-ports (PID 3485 and 4146). Pls reboot the system an check if this is still so.
Pls. send the complete output of the command "systemctl status tftpd-hpa.service"
At the end you see, where the server is looking for files and where they will be stored.
For example:
root@test:/# systemctl status tftpd-hpa.service
● tftpd-hpa.service - LSB: HPA's tftp server
Loaded: loaded (/etc/init.d/tftpd-hpa; generated; vendor preset: enabled)
Active: active (running) since Mon 2019-05-20 14:45:48 CEST; 2 months 4 days ago
Docs: man:systemd-sysv-generator(8)
Tasks: 1 (limit: 4915)
CGroup: /system.slice/tftpd-hpa.service
└─874 /usr/sbin/in.tftpd --listen --user tftp --address 0.0.0.0:69 --ipv4 --create --secure /srv/tftp
(in my case its /srv/tftp)
Maybe you have to create this directory ?
To check the firewall settings try "ufw" or "iptables -L".

Regards,
Axel

Re: TFTP / Solution for a linux server

skyvana — Wed, 24 Jul 2019 18:52:20 GMT

Re: TFTP / Solution for a linux server

ar1 — Wed, 24 Jul 2019 19:38:05 GMT

Hi Alex,
that's sounds strange:

You can send and receive files from a windows tftp client to/from the Linux server
You can send and receive files from the switch to/from the Windows server
but You cannot send/receive files to/from the Linux server ???

I don't know how your network looks like but can you ping the linux server from the switch?
Are all systems in the same network (IP Address, Netmask, Gateway)?
Is it possible that an ACL is running on the switch?
Maybe you have found a firmware bug ???
Very mystic,

Axel

Re: TFTP / Solution for a linux server

skyvana — Wed, 24 Jul 2019 21:08:15 GMT

Re: TFTP / Solution for a linux server

Drew_C — Wed, 24 Jul 2019 21:59:33 GMT

It's difficult to read your responses because they are posted as images. Please don't do this 🙂

I use tftpd-hpa in our lab. I believe the problem you're experiencing is due to the block size configuration. Here's the config I use:

code:

$ cat /etc/default/tftpd-hpa
# /etc/default/tftpd-hpa
RUN_DAEMON="yes"
TFTP_USERNAME="nobody"
TFTP_DIRECTORY="/media/TFTPsymlinks/"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="-c -B 16268 -l -s"

Note the -B 16268 option for max-block-size.

Re: TFTP / Solution for a linux server

skyvana — Thu, 25 Jul 2019 19:57:14 GMT

hi,

I already test this, but it not fix my problem, i absolutely test/check everything, that's sounds very strang.

So i test on a other Linux OS (raspbian that's is not virtual) and TADA it Work ! [ it's may be that my server was virtual ...]

Thank for your help !

Alex