Tripwire : Install

Tripwire : Install 2015/06/21

	Install and configure Host Based IDS (Intrusion Detection System) "Tripwire".
[1]	Install Tripwire.

# install from EPEL [root@dlp ~]#  yum --enablerepo=epel -y install tripwire

[2]	Create keys and database.

# generate keys [root@dlp ~]#  tripwire-setup-keyfiles ..... ..... Enter the site keyfile passphrase: # set site keyfile passphrase Verify the site keyfile passphrase: # confirm ..... ..... Enter the local keyfile passphrase: # set local keyfile passphrase Verify the local keyfile passphrase: # confirm ..... ..... Please enter your site passphrase:  # answer with site keyfile passphrase ..... ..... Please enter your site passphrase:  # answer with site keyfile passphrase ..... ..... [root@dlp ~]#  cd /etc/tripwire  [root@dlp tripwire]#  vi twcfg.txt # line 12: report level (4 is max) REPORTLEVEL = 4 # generate config [root@dlp tripwire]#  twadmin -m F -c tw.cfg -S site.key twcfg.txt  Please enter your site passphrase: # answer with site keyfile passphrase Wrote configuration file: /etc/tripwire/tw.cfg # optimize policy file with the script below [root@dlp tripwire]#  vi twpolmake.pl #!/usr/bin/perl # Tripwire Policy File customize tool # ---------------------------------------------------------------- # Copyright (C) 2003 Hiroaki Izumi # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. # ---------------------------------------------------------------- # Usage: # perl twpolmake.pl {Pol file} # ---------------------------------------------------------------- # $POLFILE=$ARGV[0]; open(POL,"$POLFILE") or die "open error: $POLFILE" ; my($myhost,$thost) ; my($sharp,$tpath,$cond) ; my($INRULE) = 0 ; while (<POL>) { chomp; if (($thost) = /^HOSTNAME\s*=\s*(.*)\s*;/) { $myhost = `hostname` ; chomp($myhost) ; if ($thost ne $myhost) { $_="HOSTNAME=\"$myhost\";" ; } } elsif ( /^{/ ) { $INRULE=1 ; } elsif ( /^}/ ) { $INRULE=0 ; } elsif ($INRULE == 1 and ($sharp,$tpath,$cond) = /^(\s*\#?\s*)(\/\S+)\b(\s+->\s+.+)$/) { $ret = ($sharp =~ s/\#//g) ; if ($tpath eq '/sbin/e2fsadm' ) { $cond =~ s/;\s+(tune2fs.*)$/; \#$1/ ; } if (! -s $tpath) { $_ = "$sharp#$tpath$cond" if ($ret == 0) ; } else { $_ = "$sharp$tpath$cond" ; } } print "$_\n" ; } close(POL) ; [root@dlp tripwire]#  perl twpolmake.pl twpol.txt > twpol.txt.new  [root@dlp tripwire]#  twadmin -m P -c tw.cfg -p tw.pol -S site.key twpol.txt.new  Please enter your site passphrase: Wrote policy file: /etc/tripwire/tw.pol # create database [root@dlp tripwire]#  tripwire -m i -s -c tw.cfg Please enter your local passphrase:

[3]	Execute checking manually. ( Daily check script for Cron is included in package )

[root@dlp ~]#  tripwire -m c -s -c /etc/tripwire/tw.cfg  Open Source Tripwire(R) 2.4.2.2 Integrity Check Report Report generated by: root Report created on: Fri 18 Jun 2015 19:53:39 PM JST Database last updated on: Never =============================================================================== Report Summary: =============================================================================== Host name: dlp.srv.world Host IP address: 10.0.0.30 Host ID: None Policy file used: /etc/tripwire/tw.pol Configuration file used: /etc/tripwire/tw.cfg Database file used: /var/lib/tripwire/dlp.srv.world.twd Command line used: tripwire -m c -s -c /etc/tripwire/tw.cfg =============================================================================== Rule Summary: =============================================================================== ------------------------------------------------------------------------------- Section: Unix File System ------------------------------------------------------------------------------- Rule Name Severity Level Added Removed Modified --------- -------------- ----- ------- -------- User binaries 66 0 0 0 Tripwire Binaries 100 0 0 0 Libraries 66 0 0 0 File System and Disk Administraton Programs 100 0 0 0 Kernel Administration Programs 100 0 0 0 Networking Programs 100 0 0 0 System Administration Programs 100 0 0 0 Hardware and Device Control Programs 100 0 0 0 System Information Programs 100 0 0 0 Application Information Programs 100 0 0 0 (/sbin/rtmon) Operating System Utilities 100 0 0 0 Critical Utility Sym-Links 100 0 0 0 Shell Binaries 100 0 0 0 Critical system boot files 100 0 0 0 * Tripwire Data Files 100 1 0 0 System boot changes 100 0 0 0 OS executables and libraries 100 0 0 0 Critical configuration files 100 0 0 0 Security Control 100 0 0 0 Login Scripts 100 0 0 0 Root config files 100 0 0 0 Invariant Directories 66 0 0 0 Temporary directories 33 0 0 0 Critical devices 100 0 0 0 (/proc/kcore) Total objects scanned: 21739 Total violations found: 1 =============================================================================== Object Summary: =============================================================================== ------------------------------------------------------------------------------- # Section: Unix File System ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- Rule Name: Tripwire Data Files (/var/lib/tripwire) Severity Level: 100 ------------------------------------------------------------------------------- Added: "/var/lib/tripwire/dlp.srv.world.twd" =============================================================================== Error Report: =============================================================================== No Errors ------------------------------------------------------------------------------- *** End of report *** Open Source Tripwire 2.4 Portions copyright 2000 Tripwire, Inc. Tripwire is a registered trademark of Tripwire, Inc. This software comes with ABSOLUTELY NO WARRANTY; for details use --version. This is free software which may be redistributed or modified only under certain conditions; see COPYING for details. All rights reserved.

[4]	If there is no ploblem even if some differences are detected, then update database like follows.

# results are saved under the directory below [root@dlp ~]#  ll /var/lib/tripwire/report  total 8 -rw-r--r-- 1 root root 6814 Jun 17 19:53 dlp.srv.world-20150617-125339.twr # update database with a specific report [root@dlp ~]#  tripwire -m u -a -s -c /etc/tripwire/tw.cfg \ -r /var/lib/tripwire/report/dlp.srv.world-20150617-125339.twr  Please enter your local passphrase: