1.\" $NetBSD: security.conf.5,v 1.23 2003/06/26 11:52:19 wiz Exp $ 2.\" 3.\" Copyright (c) 1996 Matthew R. Green 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. The name of the author may not be used to endorse or promote products 15.\" derived from this software without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd February 21, 2003 30.Dt SECURITY.CONF 5 31.Os 32.Sh NAME 33.Nm security.conf 34.Nd daily security check configuration file 35.Sh DESCRIPTION 36The 37.Nm 38file specifies which of the standard 39.Pa /etc/security 40services are performed. 41The 42.Pa /etc/security 43script is run, by default, every night from 44.Pa /etc/daily , 45on a 46.Nx 47system, if configured do to so from 48.Pa /etc/daily.conf . 49.Pp 50The variables described below can be set to "NO" to disable the test: 51.Bl -tag -width check_network 52.It Sy check_passwd 53This checks the 54.Pa /etc/master.passwd 55file for inconsistencies. 56.It Sy check_group 57This checks the 58.Pa /etc/group 59file for inconsistencies. 60.It Sy check_rootdotfiles 61This checks the root users startup files for sane settings of $PATH 62and umask. 63This test is not fail safe and any warning generated from 64this should be checked for correctness. 65.It Sy check_ftpusers 66This checks that the correct users are in the 67.Pa /etc/ftpusers 68file. 69.It Sy check_aliases 70This checks for security problems in the 71.Pa /etc/mail/aliases 72file. 73For backward compatibility, 74.Pa /etc/aliases 75will be checked as well if exists. 76.It Sy check_rhosts 77This checks for system and user rhosts files with "+" in them. 78.It Sy check_homes 79This checks that home directories are owned by the correct user, 80and have appropriate permissions. 81.It Sy check_varmail 82This checks that the correct user owns mail in 83.Pa /var/mail , 84and that the mail box has the right permissions. 85.It Sy check_nfs 86This checks that the 87.Pa /etc/exports 88file does not export filesystems to the world. 89.It Sy check_devices 90This checks for changes to devices and setuid files. 91.It Sy check_mtree 92This runs 93.Xr mtree 8 94to ensure that the system is installed correctly. 95The following configuration files are checked: 96.Bl -tag -width 4n 97.It Pa /etc/mtree/special 98Default files to check. 99.It Pa /etc/mtree/special.local 100Local site additions. 101.It Pa /etc/mtree/DIR.secure 102Specification for the directory 103.Pa DIR . 104.El 105.It Sy check_disklabels 106Backup text copies of the disklabels of available disk drives into 107.Pa /var/backups/work/disklabel.XXX , 108and display any differences in those and the previous copies 109as per 110.Sy check_changelist 111below. 112If 113.Xr fdisk 8 114is available on the current platform, the output of 115.Pa /sbin/fdisk 116for each available disk drive is stored in 117.Pa /var/backups/work/fdisk.XXX , 118and any differences displayed as per the disklabels. 119.It Sy check_pkgs 120This stores a list of all installed pkgs into 121.Pa /var/backups/work/pkgs 122and checks it for any changes. 123.It Sy check_changelist 124This determines a list of files from the contents of 125.Pa /etc/changelist , 126and the output of 127.Ic mtree -D 128for 129.Pa /etc/mtree/special 130and 131.Pa /etc/mtree/special.local . 132For each file in the list it compares the files with their backups in 133.Pa /var/backups/file.current 134and 135.Pa /var/backups/file.backup , 136and displays any differences found. 137The following 138.Xr mtree 8 139.Sy tags 140modify how files are determined from 141.Pa /etc/mtree/special 142and 143.Pa /etc/mtree/special.local : 144.Bl -tag -width exclude -offset indent 145.It exclude 146The entry is ignored; no backups are made and the differences are not 147displayed. 148This includes dynamic or binary files such as 149.Pa /var/run/utmp . 150.It nodiff 151The entry is backed up but the differences are not displayed because 152the contents of the file are sensitive. 153This includes files such as 154.Pa /etc/master.passwd . 155.El 156.El 157.Pp 158The variables described below can be set to modify the tests: 159.Bl -tag -width check_network 160.It Sy check_mtree_follow_symlinks 161During the 162.Sy check_mtree 163phase, instruct mtree to follow symbolic links. 164.It Sy check_passwd_nowarn_shells 165If 166.Sy check_passwd 167is enabled, most warnings will be suppressed for entries whose shells 168are listed in this space-separated list. 169This is of particular value when those shells are not in 170.Pa /etc/shells . 171.It Sy check_passwd_nowarn_users 172If 173.Sy check_passwd 174is enabled, suppress warnings for these users. 175.It Sy check_passwd_permit_star 176If 177.Sy check_passwd 178is enabled, do not warn about password fields set to 179.Dq * . 180Note that the use of password fields such as 181.Dq *ssh 182is encouraged, instead. 183.It Sy max_grouplen 184If 185.Sy check_group 186is enabled, this determines the maximum permitted length of group names. 187.It Sy max_loginlen 188If 189.Sy check_passwd 190is enabled, this determines the maximum permitted length of login names. 191.It Sy backup_dir 192Change the backup directory from 193.Pa /var/backup . 194.It Sy diff_options 195Specify the options passed to 196.Xr diff 1 197when it is invoked to show changes made to system files. 198Defaults to 199.Dq -u , 200for unified-format context-diffs. 201.It Sy pkgdb_dir 202Change the pkg database directory from 203.Pa /var/db/pkg 204when 205.Sy check_pkgs 206is enabled. 207.It Sy backup_uses_rcs 208Use 209.Xr rcs 1 210for maintaining backup copies of files noted in 211.Sy check_devices , 212.Sy check_disklabels , 213.Sy check_pkgs , 214and 215.Sy check_changelist 216instead of just keeping a current copy and a backup copy. 217.El 218.Sh FILES 219.Bl -tag -width /etc/security.local -compact 220.It Pa /etc/security 221daily security check script 222.It Pa /etc/security.conf 223daily security check configuration 224.It Pa /etc/security.local 225local site additions to 226.Pa /etc/security 227.El 228.Sh SEE ALSO 229.Xr daily.conf 5 230.Sh HISTORY 231The 232.Nm 233file appeared in 234.Nx 1.3 . 235The 236.Sy check_disklabels 237functionality was added in 238.Nx 1.4 . 239The 240.Sy backup_uses_rcs 241and 242.Sy check_pkgs 243features were added in 244.Nx 1.6 . 245.Sy diff_options 246appeared in 247.Nx 2.0 ; 248prior to that, traditional-format (context free) diffs were generated. 249