Quoting Florin Iucha (florin at iucha.net):
> Ugh... a not running tftp server is a secure tftp server. And a not
> installed one is even more secure.
> 
> Why do you need to have it secured? Install it, use it to upgrade CBOS
> and the uninstall it.

Try explaining this to someone who installs redhat 7.2 with the most secure
option which disallows any initiate incoming port. Then walk them through
changing ipchains (7.2 uses ipchains by default). THEN install tftp, THEN
uninstalling tftp. 

Serial just seems easier.
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