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 Feb 1996 35.Dt HOSTS.EQUIV 5 36.Os FreeBSD 37.Sh NAME 38.Nm hosts.equiv , 39.Nm .rhosts 40.Nd trusted remote host name and user data base 41.Sh DESCRIPTION 42The 43.Nm hosts.equiv 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 51simple 52.Bd -unfilled -offset indent 53hostname [username] 54.Ed 55 56or the more verbose 57.Bd -unfilled -offset indent 58[+-][hostname|@netgroup] [[+-][username|@netgroup]] 59.Ed 60.Pp 61A ``@'' indicates a host by netgroup or user by netgroup. A single 62``+'' matches all hosts or users. A host name with a leading ``-'' will reject 63all matching hosts and all their users. A user name with leading ``-'' 64will reject all matching users from matching hosts. 65.Pp 66Items are separated by any number of blanks and/or 67tab characters. A ``#'' indicates the beginning of 68a comment; characters up to the end of the line are 69not interpreted by routines which search the file. 70.Pp 71Host names are specified in the conventional 72``.'' (dot) notation using the 73.Xr inet_addr 3 74routine 75from the Internet address manipulation library, 76.Xr inet 3 . 77Host names may contain any printable 78character other than a field delimiter, newline, 79or comment character. 80.Pp 81For security reasons, a user's 82.Nm .rhosts 83file will be ignored if it is not a regular file, or if it 84is not owned by the user, or 85if it is writable by anyone other than the user. 86.Sh EXAMPLES 87.Pp 88.Dl bar.com foo 89.Pp 90Trust user ``foo'' from host ``bar.com''. 91.Pp 92.Dl +@allclient 93.Pp 94Trust all hosts from netgroup ``allclient''. 95.Pp 96.Dl +@allclient -@dau 97.Pp 98Trust all hosts from netgroup ``allclient'' and their users 99except users from netgroup ``dau''. 100.Sh FILES 101.Bl -tag -width /etc/hosts.equivxxx -compact 102.It Pa /etc/hosts.equiv 103The 104.Nm hosts.equiv 105file resides in 106.Pa /etc . 107.It Pa $HOME/.rhosts 108.Nm .rhosts 109file resides in 110.Pa $HOME . 111.El 112.Sh SEE ALSO 113.Xr rcp 1 , 114.Xr rlogin 1 , 115.Xr rsh 1 , 116.Xr gethostbyname 3 , 117.Xr inet 3 , 118.Xr innetgr 3 , 119.Xr ruserok 3 , 120.Xr yp 4 , 121.Xr ifconfig 8 , 122.Xr named 8 123.Sh BUGS 124This man page is incomplete. For more information read 125the source in lib/libc/net/rcmd.c or the sunos man page. 126