TFTP Server Logs (or lack there of)

We have a TFTP server running on our network and sometimes we need to get a handle on the requests on the server.  By default if you are using linux and the tftp server through xinetd you won’t have a log file to look at.  Thus you need to use TCPDUMP… here is how you do it:

tcpdump port 69 -v

This was really helpful for us when we were setting up our Cisco 7960 phones and needed to get a handle on what in the world the crazy Cisco firmware was even requesting!