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 December 8, 2007 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 Internet DNS 84dotted-domains 85.Dq .\& 86(dot) notation using the 87.Xr inet_addr 3 88routine 89from the Internet address manipulation library, 90.Xr inet 3 . 91Host names may contain any printable 92character other than a field delimiter, newline, 93or comment character. 94.Pp 95For security reasons, a user's 96.Nm .rhosts 97file will be ignored if it is not a regular file, or if it 98is not owned by the user, or 99if it is writable by anyone other than the user. 100.Sh FILES 101.Bl -tag -width /etc/hosts.equivxxx -compact 102.It Pa /etc/hosts.equiv 103The 104.Nm 105file resides in 106.Pa /etc . 107.It Pa $HOME/.rhosts 108.Nm .rhosts 109file resides in 110.Pa $HOME . 111.El 112.Sh EXAMPLES 113.Dl bar.com foo 114.Pp 115Trust user 116.Dq foo 117from host 118.Dq bar.com . 119.Pp 120.Dl +@allclient 121.Pp 122Trust all hosts from netgroup 123.Dq allclient . 124.Pp 125.Dl +@allclient -@dau 126.Pp 127Trust all hosts from netgroup 128.Dq allclient 129and their users 130except users from netgroup 131.Dq dau . 132.Sh SEE ALSO 133.Xr rcp 1 , 134.Xr rlogin 1 , 135.Xr rsh 1 , 136.Xr gethostbyname 3 , 137.Xr inet 3 , 138.Xr innetgr 3 , 139.Xr ruserok 3 , 140.Xr netgroup 5 , 141.Xr ifconfig 8 , 142.Xr named 8 , 143.Xr yp 8 144.Sh BUGS 145This manual page is incomplete. 146For more information read 147the source in 148.Pa src/lib/libc/net/rcmd.c 149or the SunOS manual page. 150