1.\" Copyright 1998 Juniper Networks, Inc. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd June 13, 2023 26.Dt TACPLUS.CONF 5 27.Os 28.Sh NAME 29.Nm tacplus.conf 30.Nd TACACS+ client configuration file 31.Sh SYNOPSIS 32.Pa /etc/tacplus.conf 33.Sh DESCRIPTION 34.Nm 35contains the information necessary to configure the TACACS+ client 36library. 37It is parsed by 38.Fn tac_config 39(see 40.Xr libtacplus 3 ) . 41The file contains one or more lines of text, each describing a 42single TACACS+ server which is to be used by the library. 43Leading 44white space is ignored, as are empty lines and lines containing 45only comments. 46.Pp 47A TACACS+ server is described by a minimum of two fields on a line. 48The fields are separated by whitespace and follow the same rules for 49comments, quoting, escaping, and line continuation as the POSIX shell. 50.Pp 51The first field specifies 52the server host, either as a fully qualified domain name or as a 53dotted-quad IP address. 54The host may optionally be followed by a 55.Ql \&: 56and a numeric port number, without intervening white space. 57If the 58port specification is omitted, it defaults to 49, the standard TACACS+ 59port. 60.Pp 61The second field contains the shared secret, which should be known 62only to the client and server hosts. 63It is an arbitrary string 64of characters, though it must be enclosed in double quotes if it 65contains white space or is empty. 66An empty secret disables the 67normal encryption mechanism, causing all data to cross the network in 68cleartext. 69.Pp 70The optional third field may contain a decimal integer specifying the 71timeout in seconds for communicating with the server. 72The timeout applies 73separately to each connect, write, and read operation. 74If this field is omitted, it defaults to 3 seconds. 75.Pp 76The optional fourth field may contain the string 77.Ql single-connection . 78If this option is included, the library will attempt to negotiate 79with the server to keep the TCP connection open for multiple 80sessions. 81Some older TACACS+ servers become confused if this option 82is specified. 83.Pp 84Any subsequent fields must be of the form 85.Ar attribute Ns = Ns Ar value 86and will be appended to authorization responses as if they had been 87sent by the server. 88.Pp 89Up to 10 TACACS+ servers may be specified. 90The servers are tried in 91order, until a valid response is received or the list is exhausted. 92.Pp 93The standard location for this file is 94.Pa /etc/tacplus.conf . 95An alternate pathname may be specified in the call to 96.Fn tac_config 97(see 98.Xr libtacplus 3 ) . 99Since the file contains sensitive information in the form of the 100shared secrets, it should not be readable except by root. 101.Sh FILES 102.Bl -tag -width Pa 103.It Pa /etc/tacplus.conf 104.El 105.Sh EXAMPLES 106.Bd -literal 107# A simple entry using all the defaults: 108tacserver.domain.com OurLittleSecret 109 110# A server using a non-standard port, with an increased timeout and 111# the "single-connection" option, and overrides for the for uid, gid 112# and shell attributes. 113auth.domain.com:4333 "Don't tell!!" 15 single-connection \e 114 uid=1001 gid=20 shell="/usr/local/bin/zsh" 115 116# A server specified by its IP address: 117192.168.27.81 $X*#..38947ax-+= shell="/sbin/nologin" 118.Ed 119.Sh SEE ALSO 120.Xr libtacplus 3 121.Sh AUTHORS 122This documentation was written by 123.An John Polstra , 124and donated to the 125.Fx 126project by Juniper Networks, Inc. 127