weird tftp problem

[higg]

Hello,
Centos 7, all latest updates. I installed tftp server according to instructions and don't understand what's wrong.
Client (from same subnet), either Linux or Windows, only able to create 0 size file, then timeout.
I turned off firewalld and put SELinux to disabled. No help.
I didn't understand, why I need to install both tftp-server and xinetd, first installed only tftp-server with same problem.
Installed xinetd as well, no luck, same problem.

[TrevorH]

Make sure that when you use firewall-cmd you enable the _service_ not the port - i.e. firewall-cmd --add-service=tftp NOT --add-port=69/udp

[higg]

thanks for reply, but I bet this is not related to firewall, as I wrote, I disabled it.

[TrevorH]

But you will want to re-enable it again at some point...

[jlehtone]

But you will want to re-enable it again at some point...

... and the SELinux too.

The man tftpd of 'tftp-server' package mentions option --create and has a section about security.

Is tftp really the best option for writing to server?

[higg]

Is tftp really the best option for writing to server?

I didn't ask is it best option or not. I asked why it's not working.

[aks]

I think you need to shed some light on this.

Code: Select all

I installed tftp server according to instructions

Whose instructions, and why?

Linux or Windows, only able to create 0 size file, then timeout.

So it doesn't get the data.

install both tftp-server and xinetd

Why did you install xinetd?

The question really is why do UDP ("not connected") transaction fail?

Perhaps trace UDP activity across your network (but just guessing here)