tftp issues

Hi,

I think I have posted this in the correct section.

I have a problem we have been given a network to look after with some linux servers on it, unfortunately I have very little experience on how these work.

I have set a tftp server up on a windows server and have been trying tosend files from the linux network. The file is showing but has 0kb and I get timeout errors.

i have checked yast firewall settings to make sure TFTP is allowed on port 69, I have tried disabling fiewall alltogether which seems to make this work.

I also have read articles on how to check that the tftp file is correctly configured, which to me it looks like its fine.

I would really appreciate any help on this at all. I have been trying for 3 days and im no further forward.

Many thanks for any help.

Hi there,

Since taking the firewall offline causes everything to spring to life, I think your problem is there. TFTP doesn't just use port 69. Port 69 is used to initiate a write request (which probably creates your zero length file) but then the server contacts the client on a random port and the actual data transfer is done on that port.

If you can, I suggest limiting the ports the TFTP server uses and opening them on the client's firewall.

Let us know how you get on.

Sorry, I meant to say disabling the firewall makes it worse. Once disabled I cant even see the file trying to be transmitted to the tftp.

I have port 69 open on my firewall where I am trying to send the file.

Can you do anything else while the firewall is disabled? I have see some firewall setups where disabled means "stop everything" and there is a separate "permit everything" option.

Also, did you try configuring the firewalls and TFTP as I suggested above?

Let us know how you get on