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Top Forums Shell Programming and Scripting Unix Shell Scripting Standards Post 302112659 by janmolby on Thursday 29th of March 2007 09:21:56 AM
Old 03-29-2007
Thanks a million 66IISW & cfajohnson for your replies, I will try & use the information you've sent on.
 

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TFTPD(8)						    BSD System Manager's Manual 						  TFTPD(8)

NAME
tftpd -- DARPA Trivial File Transfer Protocol server SYNOPSIS
tftpd [-n] [-s] [directory ...] DESCRIPTION
Tftpd is a server which supports the DARPA Trivial File Transfer Protocol. The TFTP server operates at the port indicated in the 'tftp' ser- vice description; see services(5). The server is normally started by inetd(8). The use of tftp(1) does not require an account or password on the remote system. Due to the lack of authentication information, tftpd will allow only publicly readable files to be accessed. Files may 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 may not be appropriate on all systems, and its implications should be considered before enabling tftp service. The server should have the user ID with the lowest possible privilege. Access to files may be controlled by invoking tftpd with a list of directories by including pathnames 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. If no directories are supplied the default is /tftpboot. To give out access to the whole filesystem, should this be desired for some reason, supply / as an argument. Unfortunately, on multi-homed systems, it is impossible for tftpd to determine the address on which a packet was received. As a result, tftpd uses two different mechanisms to guess the best source address to use for replies. If the socket that inetd(8) passed to tftpd is bound to a particular address, tftpd uses that address for replies. Otherwise, tftpd uses ``UDP connect'' to let the kernel choose the reply address based on the destination of the replies and the routing tables. This means that most setups will work transparently, while in cases where the reply address must be fixed, the virtual hosting feature of inetd(8) can be used to ensure that replies go out from the correct address. These considerations are important, because most tftp clients will reject reply packets that appear to come from an unexpected address. The options are: -n Suppresses negative acknowledgement of requests for nonexistent relative filenames. -s All absolute filenames are treated as if they were preceded by the first directory argument, or /tftpboot if there is none. SEE ALSO
tftp(1), inetd(8) HISTORY
The tftpd command appeared in 4.2BSD. Linux NetKit (0.17) July 29, 2000 Linux NetKit (0.17)

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