tftpd - Internet Trivial File Transfer Protocol server
tftpd [-ln] [directory ...]
The tftpd(1) utility is a server that supports the Internet Trivial File Transfer Protocol (TFTP) (RFC 783). The TFTP server operates at the port indicated in the tftp service description. The server is normally started by inetd(1).
The use of tftp(1) does not require an account or password on the remote system. Due to the lack of authentication information, tftpd(1) will allow only publicly readable files to be accessed. Files containing the string "/../" are not allowed. Files can be written only if they already exist and are publicly writable. Note that this extends the concept of public to include all users on all hosts that can be reached through the network; this might not be appropriate on all systems, and its implications should be considered before enabling tftp service. The server should have the user identifier (ID) with the lowest possible privilege.
Access to files can be restricted by invoking tftpd(1) with a list of directories and including up to 20 path names as server program arguments in /etc/inetd.conf. In this case, access is restricted to files whose names are prefixed by the one of the given directories. The given directories are also treated as a search path for relative file name requests.
If no list of directories is specified with tftp(1) in the /etc/inetd.conf file, all directories are accessible to the remote user. For security reasons, it is highly recommended that at least one directory be listed, and that the -l option always.
The options are:
tftp(1)
inetd(1)