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- ttttffffttttppppdddd((((1111MMMM)))) ttttffffttttppppdddd((((1111MMMM))))
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- NNNNAAAAMMMMEEEE
- tftpd - internet Trivial File Transfer Protocol server
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ////uuuussssrrrr////eeeettttcccc////ttttffffttttppppdddd [----hhhh _h_o_m_e_d_i_r] [----llll] [----nnnn] [----ssss] [_d_i_r_e_c_t_o_r_y... ]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _t_f_t_p_d is a server that supports the Internet Trivial File Transfer
- Protocol (TFTP). The TFTP server operates at the port indicated in the
- ttttffffttttpppp service description; see _s_e_r_v_i_c_e_s(4). The server is normally
- started by _i_n_e_t_d(1M).
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- The use of _t_f_t_p(1C) does not require an account or password on the remote
- system. Due to the lack of authentication information, _t_f_t_p_d allows 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 _p_u_b_l_i_c 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 be
- configured in /_e_t_c/_i_n_e_t_d._c_o_n_f to run as the user ID with the lowest
- possible privilege.
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- Relative filenames are looked up in a home directory, /_v_a_r/_b_o_o_t by
- default.
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- The _t_f_t_p_d options are:
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- ----hhhh _h_o_m_e_d_i_r
- Changes the home directory to _h_o_m_e_d_i_r, provided it is an absolute
- pathname.
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- ----llll Logs all requests using _s_y_s_l_o_g(3C).
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- ----nnnn Suppresses negative acknowledgement of requests for nonexistent or
- inaccessible relative filenames. Use ----nnnn when operating on a network
- with Sun diskless clients that broadcast TFTP requests for bootfiles
- named by relative pathnames, to avoid storms of negative
- acknowledgements.
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- ----ssss Rejects requests to read or write an absolute pathname that does not
- begin with the home directory prefix and to write a relative
- pathname. (See below.)
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- Normally, _t_f_t_p_d allows unrestricted access to publicly-readable files in
- all directories. There are two ways to enhance file security by
- restricting access to a smaller set of directories. With the ----ssss option,
- _t_f_t_p_d rejects requests to read or write an absolute pathname that does
- not begin with the home directory prefix. It also rejects requests to
- write a relative pathname. Another method is to restrict access to files
- in a limited number of _a_p_p_r_o_v_e_d directories by specifying the directory
- names, _d_i_r_e_c_t_o_r_y, as arguments to _t_f_t_p_d after the other options. For an
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- PPPPaaaaggggeeee 1111
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- ttttffffttttppppdddd((((1111MMMM)))) ttttffffttttppppdddd((((1111MMMM))))
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- absolute pathname request, _t_f_t_p_d allows the request if its name begins
- with one of these directories or the home directory. For a relative
- pathname request, the home directory and the directory list are searched
- in order. Up to ten directories can be listed if no other command-line
- options are specified. (_i_n_e_t_d limits the total number of command-line
- arguments to ten.)
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- inetd(1M), tftp(1C).
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- PPPPaaaaggggeeee 2222
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