Introduction
If you are in need of a TFTP for config backups then sometimes the “old school” ways of doing things are still useful. Bear in mind the TFTP protocol incorporates no encryption so be wary about using it across untrusted networks.
Solution
Rather than re-hash what Pete has already written about so clearly, I’ll just provide a link! Great work as always Pete.
http://www.petenetlive.com/KB/Article/0000998
Install and Configure a TFTP Service on CentOS