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Diffstat (limited to 'src/appl/telnet/telnetd/telnetd.0')
| -rw-r--r-- | src/appl/telnet/telnetd/telnetd.0 | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/appl/telnet/telnetd/telnetd.0 b/src/appl/telnet/telnetd/telnetd.0 new file mode 100644 index 0000000000..3a7d3a7083 --- /dev/null +++ b/src/appl/telnet/telnetd/telnetd.0 @@ -0,0 +1,132 @@ + + + +TELNETD(8) MAINTENANCE COMMANDS TELNETD(8) + + + +NAME + telnetd - DARPA TELNET protocol server + +SYNOPSIS + /etc/telnetd [-debug [_p_o_r_t]] [-l] [-D options] [-D report] + [-D exercise] [-D netdata] [-D ptydata] + +DESCRIPTION + _T_e_l_n_e_t_d is a server which supports the DARPA standard TELNET + virtual terminal protocol. _T_e_l_n_e_t_d is invoked by the inter- + net server (see _i_n_e_t_d(8)), normally for requests to connect + to the TELNET port as indicated by the /_e_t_c/_s_e_r_v_i_c_e_s file + (see _s_e_r_v_i_c_e_s(5)). If the -debug may be used, to start up + telnetd manually, instead of through _i_n_e_t_d(8). If started + up this way, _p_o_r_t may be specified to run _t_e_l_n_e_t_d on an + alternate TCP port number. + + The -D option may be used for debugging purposes. This + allows _t_e_l_n_e_t to print out debugging information to the con- + nection, allowing the user to see what telnetd is doing. + There are several modifiers: options prints information + about the negotiation of TELNET options, report prints the + options information, plus some additional information about + what processing is going on, netdata displays the data + stream received by _t_e_l_n_e_t_d, ptydata displays data written to + the pty, and exercise has not been implemented yet. + + _T_e_l_n_e_t_d operates by allocating a pseudo-terminal device (see + _p_t_y(4)) for a client, then creating a login process which + has the slave side of the pseudo-terminal as stdin, stdout, + and stderr. _T_e_l_n_e_t_d manipulates the master side of the + pseudo-terminal, implementing the TELNET protocol and pass- + ing characters between the remote client and the login pro- + cess. + + When a TELNET session is started up, _t_e_l_n_e_t_d sends TELNET + options to the client side indicating a willingness to do + _r_e_m_o_t_e _e_c_h_o of characters, to _s_u_p_p_r_e_s_s _g_o _a_h_e_a_d, to do + _r_e_m_o_t_e _f_l_o_w _c_o_n_t_r_o_l, and to receive _t_e_r_m_i_n_a_l _t_y_p_e _i_n_f_o_r_m_a_- + _t_i_o_n, _t_e_r_m_i_n_a_l _s_p_e_e_d _i_n_f_o_r_m_a_t_i_o_n, and _w_i_n_d_o_w _s_i_z_e _i_n_f_o_r_m_a_- + _t_i_o_n from the remote client. If the remote client is wil- + ling, the remote terminal type is propagated in the environ- + ment of the created login process. The pseudo-terminal + allocated to the client is configured to operate in "cooked" + mode, and with XTABS and CRMOD enabled (see _t_t_y(4)). + + _T_e_l_n_e_t_d is willing to _d_o: _e_c_h_o, _b_i_n_a_r_y, _s_u_p_p_r_e_s_s _g_o _a_h_e_a_d, + and _t_i_m_i_n_g _m_a_r_k. _T_e_l_n_e_t_d is willing to have the remote + client _d_o: _l_i_n_e_m_o_d_e, _b_i_n_a_r_y, _t_e_r_m_i_n_a_l _t_y_p_e, _t_e_r_m_i_n_a_l _s_p_e_e_d, + _w_i_n_d_o_w _s_i_z_e, _t_o_g_g_l_e _f_l_o_w _c_o_n_t_r_o_l, _e_n_v_i_r_o_n_m_e_n_t, _X _d_i_s_p_l_a_y + _l_o_c_a_t_i_o_n, and _s_u_p_p_r_e_s_s _g_o _a_h_e_a_d. + + + + +Sun Release 4.1 Last change: June 28, 1990 1 + + + + + + +TELNETD(8) MAINTENANCE COMMANDS TELNETD(8) + + + +SEE ALSO + telnet(1) + +BUGS + Some TELNET commands are only partially implemented. + + Because of bugs in the original 4.2 BSD _t_e_l_n_e_t(1), _t_e_l_n_e_t_d + performs some dubious protocol exchanges to try to discover + if the remote client is, in fact, a 4.2 BSD _t_e_l_n_e_t(1). + + _B_i_n_a_r_y _m_o_d_e has no common interpretation except between + similar operating systems (Unix in this case). + + The terminal type name received from the remote client is + converted to lower case. + + _T_e_l_n_e_t_d never sends TELNET _g_o _a_h_e_a_d commands. + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +Sun Release 4.1 Last change: June 28, 1990 2 + + + |