Which port does tftp use

View Suggested Paths. See All Videos. Popular Videos. Learn More. Visit the Upgrade Resource Center. Learn more. Professional Premier Premier Enterprise. Choose what best fits your environment and budget to get the most out of your software.

Get priority call queuing and escalation to an advanced team of support specialist. Premier Support Premier Enterprise Support. Your SolarWinds products come with a secret weapon.

Orange Matter. View Orange Matter. LogicalRead Blog. Read the Blog. Toggle SideBar. Success Center. These small acknowledgements have been added by the software company who created the program I was using for this example. Notice how I entered the file I wanted to downloaded server. If I didn't provide the Remote File name, I would simply get an error poping up at the server side, complaing that no such file exists.

You can also send files using TFTP, as it's not just for downloading :. TFTP is used mostly for backing up router configuration files like Cisco and its IOS images, it is also used for diskless booting PC's where, after the workstation has booted from the network card's ROM, TFTP is used to download the program it needs to load and run from a central server. Below is a diagram which shows what takes place during a TFTP session:. In this diagram we are assuming that there is no error checking built into the software running at both ends client and server.

And that pretty much sums it all up for the TFTP protocol. Back to Network Protocols Section. You will find some very good TFTP servers and clients in the download section. Because TFTP clients are often implemented in hardware, with no users involved, neither modified clients nor modified user procedures are generally implementable.

A transparent proxy could easily support TFTP, providing the same extremely minimal amount of security achievable if you allow TFTP through packet filters. There are two possible problems. First, TFTP responses come from a different port from the one the original request is sent to.

Some systems will consider this a new interaction and may not perform the appropriate translation to match the original request. Second, TFTP clients and servers pay attention to the source port of data. If the source port maps changes during an interaction, the transfer will be interrupted.