1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. 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.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $FreeBSD$ 33.\" 34.Dd October 13, 2006 35.Dt HOSTS.EQUIV 5 36.Os 37.Sh NAME 38.Nm hosts.equiv , 39.Nm .rhosts 40.Nd trusted remote host and user name data base 41.Sh DESCRIPTION 42The 43.Nm 44and 45.Nm .rhosts 46files contain information regarding 47trusted hosts and users on the network. 48For each host a single line should be present 49with the following information: 50.Pp 51simple 52.Bd -unfilled -offset indent 53hostname [username] 54.Ed 55.Pp 56or the more verbose 57.Bd -unfilled -offset indent 58[+-][hostname|@netgroup] [[+-][username|@netgroup]] 59.Ed 60.Pp 61A 62.Dq @ 63indicates a host by netgroup or user by netgroup. 64A single 65.Dq + 66matches all hosts or users. 67A host name with a leading 68.Dq - 69will reject 70all matching hosts and all their users. 71A user name with leading 72.Dq - 73will reject all matching users from matching hosts. 74.Pp 75Items are separated by any number of blanks and/or 76tab characters. 77A 78.Dq # 79indicates the beginning of 80a comment; characters up to the end of the line are 81not interpreted by routines which search the file. 82.Pp 83Host names are specified in the conventional 84.Dq .\& 85(dot) notation using the 86.Xr inet_addr 3 87routine 88from the Internet address manipulation library, 89.Xr inet 3 . 90Host names may contain any printable 91character other than a field delimiter, newline, 92or comment character. 93.Pp 94For security reasons, a user's 95.Nm .rhosts 96file will be ignored if it is not a regular file, or if it 97is not owned by the user, or 98if it is writable by anyone other than the user. 99.Sh FILES 100.Bl -tag -width /etc/hosts.equivxxx -compact 101.It Pa /etc/hosts.equiv 102The 103.Nm 104file resides in 105.Pa /etc . 106.It Pa $HOME/.rhosts 107.Nm .rhosts 108file resides in 109.Pa $HOME . 110.El 111.Sh EXAMPLES 112.Dl bar.com foo 113.Pp 114Trust user 115.Dq foo 116from host 117.Dq bar.com . 118.Pp 119.Dl +@allclient 120.Pp 121Trust all hosts from netgroup 122.Dq allclient . 123.Pp 124.Dl +@allclient -@dau 125.Pp 126Trust all hosts from netgroup 127.Dq allclient 128and their users 129except users from netgroup 130.Dq dau . 131.Sh SEE ALSO 132.Xr rcp 1 , 133.Xr rlogin 1 , 134.Xr rsh 1 , 135.Xr gethostbyname 3 , 136.Xr inet 3 , 137.Xr innetgr 3 , 138.Xr ruserok 3 , 139.Xr netgroup 5 , 140.Xr ifconfig 8 , 141.Xr named 8 , 142.Xr yp 8 143.Sh BUGS 144This manual page is incomplete. 145For more information read 146the source in 147.Pa src/lib/libc/net/rcmd.c 148or the SunOS manual page. 149