Contents
SNORT3 Install
Snort is an open source network intrusion detection system capable of performing real-time traffic analysis and packet logging on IP networks.
It can perform "protocol analysis," "content search," and "matching," and can be used to detect a variety of attacks, including "buffer overflows," "stealth port scans," "CGI attacks," "SMB probes," "OS fingerprinting attempts," "semantic URL attacks," and "server message block probes.
MiracleLinux9 does not have a Snort3 repository, so build, compile and install Snort3 from source code
1. Advance preparation
①Install required build tools and libraries
|
1 |
# dnf install bison flex libtool nghttp2 libnghttp2-devel libpcap-devel pcre-devel openssl-devel libdnet-devel libtirpc-devel git gcc-c++ libunwind-devel cmake hwloc-devel luajit-devel xz-devel libnfnetlink-devel libmnl-devel libnetfilter_queue-devel uuid-devel -y |
Install CERT Forensics Tools repository as libsafec-devel is not available in the EPEL repository.
Install libsafec-devel
|
1 2 3 |
# wget https://forensics.cert.org/cert-forensics-tools-release-el9.rpm # rpm -Uvh cert-forensics-tools-release*rpm # dnf --enablerepo=forensics install libsafec-devel |
②SNORT3 installation working directory creation
|
1 |
# mkdir snort_src && cd snort_src |
③DAQ Download Install
|
1 2 3 4 5 6 |
# git clone https://github.com/snort3/libdaq.git # cd libdaq # ./bootstrap # ./configure # make # make install |
④Tcmalloc Install
Installed gperftools to improve speed when memory usage increases
|
1 2 3 4 5 6 7 |
# cd ../ # wget https://github.com/gperftools/gperftools/releases/download/gperftools-2.9.1/gperftools-2.9.1.tar.gz # tar xzf gperftools-2.9.1.tar.gz # cd gperftools-2.9.1/ # ./configure # make # make install |
2. Snort3 Download Install
①Download, compile, and install Snort3
|
1 2 3 4 5 6 7 8 |
# cd ../ # wget https://github.com/snort3/snort3/archive/refs/tags/3.1.31.0.tar.gz # tar xzf 3.1.31.0.tar.gz # cd snort3-3.1.31.0 # ./configure_cmake.sh --prefix=/usr/local --enable-tcmalloc # cd build # make # make install |
②Update shared libraries
|
1 2 3 |
# ln -s /usr/local/lib/libtcmalloc.so.4 /lib/ # ln -s /usr/local/lib/libdaq.so.3 /lib/ # ldconfig |
Check version
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
# snort -V o" )~ Version 3.1.31.0 '''' By Martin Roesch & The Snort Team http://snort.org/contact#team Copyright (C) 2014-2022 Cisco and/or its affiliates. All rights reserved. Copyright (C) 1998-2013 Sourcefire, Inc., et al. Using DAQ version 3.0.12 Using LuaJIT version 2.1.0-beta3 Using OpenSSL 3.0.7 1 Nov 2022 Using libpcap version 1.10.0 (with TPACKET_V3) Using PCRE version 8.44 2020-02-12 Using ZLIB version 1.2.11 Using LZMA version 5.2.5 |
3. Network Interface Card Configuration
①Configure network interface card
※The "ens160" part below should be adapted to your environment.
|
1 2 3 4 5 6 7 |
# ip link set dev ens160 promisc on # ip add sh ens160 2: ens160: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:0c:29:05:a7:c2 brd ff:ff:ff:ff:ff:ff altname enp3s0 inet 192.168.11.83/24 brd 192.168.11.255 scope global noprefixroute ens160 valid_lft forever preferred_lft forever |
Disable interface offloading so that Snort does not truncate packets larger than 1518 bytes
Confirmation of current status
|
1 2 3 |
# ethtool -k ens160 | grep receive-offload generic-receive-offload: on large-receive-offload: on |
Disable GRO and LRO as they are turned on.
|
1 |
# ethtool -K ens160 gro off lro off |
Create and enable systemd service so that changes will take effect after system reboot
|
1 |
# vi /etc/systemd/system/snort3-promisc.service |
Contents of snort3-promisc.service
[Unit]
Description=Set Snort 3 NIC in promiscuous mode and Disable GRO, LRO on boot
After=network.target
[Service]
Type=oneshot
ExecStart=/usr/sbin/ip link set dev ens160 promisc on
ExecStart=/usr/sbin/ethtool -K ens160 gro off lro off
TimeoutStartSec=0
RemainAfterExit=yes
[Install]
WantedBy=default.target
|
1 2 3 |
# systemctl daemon-reload # systemctl enable --now snort3-promisc.service Created symlink /etc/systemd/system/default.target.wants/snort3-promisc.service → /etc/systemd/system/snort3-promisc.service. |
4.Use of Community Rules
Set community rules this time
①Create Snort Rules directory
|
1 |
# mkdir /usr/local/etc/rules |
➁Download Snort 3 Community Rules from the Snort 3 Download Page
Extract the rules and copy them to the configuration folder
|
1 |
# wget -qO- https://www.snort.org/downloads/community/snort3-community-rules.tar.gz | tar xz -C /usr/local/etc/rules/ |
Check inside the configuration folder
|
1 2 3 4 5 6 |
# ls -1 /usr/local/etc/rules/snort3-community-rules/ AUTHORS LICENSE sid-msg.map snort3-community.rules VRT-License.txt |
5. Edit Main Configuration File
|
1 2 3 4 5 |
# vi /usr/local/etc/snort/snort.lua # Line 24: Change to own server IP address HOME_NET = '192.168.11.0/24' # Line 28 : Change EXTERNAL_NET = '!$HOME_NET' |
Update path to rules
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
# vi /usr/local/etc/snort/snort.lua # Per Line193 : Update rule paths in the ips section ips = { -- use this to enable decoder and inspector alerts --enable_builtin_rules = true, -- use include for rules files; be sure to set your path -- note that rules files can include other rules files -- (see also related path vars at the top of snort_defaults.lua) variables = default_variables, rules = [[ include $RULE_PATH/snort3-community-rules/snort3-community.rules ]] } |
OpenAppID install
Download and install Snort OpenAppID from the Snort 3 download page
Please change to the latest version.
|
1 2 3 |
# wget https://www.snort.org/downloads/openappid/33380 -O OpenAppId-33380.tgz # tar -xzvf OpenAppId-33380.tgz # cp -R odp /usr/local/lib/ |
Edit the snort 3 configuration file to define the location of the OpenAppID library
|
1 2 3 4 5 6 7 8 9 |
# vi /usr/local/etc/snort/snort.lua # Per Line 101 : Add appid = { -- appid requires this to use appids in rules --app_detector_dir = 'directory to load appid detectors from' app_detector_dir = '/usr/local/lib', log_stats = true, } |
Snorts log directory creation
|
1 |
# mkdir /var/log/snort |
Check configuration files
|
1 |
# snort -c /usr/local/etc/snort/snort.lua --daq-dir /usr/local/lib/daq |
OK if the check results in the following
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 |
-------------------------------------------------- o")~ Snort++ 3.1.31.0 -------------------------------------------------- Loading /usr/local/etc/snort/snort.lua: Loading snort_defaults.lua: Finished snort_defaults.lua: Loading file_magic.lua: Finished file_magic.lua: output ips classifications references packets dce_udp imap normalizer rpc_decode ssh active alerts daq decode host_cache host_tracker hosts network process search_engine so_proxy cip telnet stream stream_ip stream_icmp stream_tcp stream_udp stream_user stream_file arp_spoof back_orifice dns netflow pop sip ssl dnp3 iec104 mms modbus s7commplus dce_smb dce_tcp dce_http_proxy dce_http_server gtp_inspect port_scan smtp ftp_server ftp_client ftp_data http_inspect http2_inspect file_id file_policy appid wizard binder trace Finished /usr/local/etc/snort/snort.lua: Loading ips.rules: Loading ../rules/snort3-community-rules/snort3-community.rules: Finished ../rules/snort3-community-rules/snort3-community.rules: Finished ips.rules: -------------------------------------------------- ips policies rule stats id loaded shared enabled file 0 4024 0 4024 /usr/local/etc/snort/snort.lua -------------------------------------------------- rule counts total rules loaded: 4024 text rules: 4024 option chains: 4024 chain headers: 323 flowbits: 48 flowbits not checked: 23 -------------------------------------------------- port rule counts tcp udp icmp ip any 473 58 147 22 src 177 17 0 0 dst 778 153 0 0 both 6 11 0 0 total 1434 239 147 22 -------------------------------------------------- service rule counts to-srv to-cli dcerpc: 7 4 dhcp: 2 2 dns: 28 7 ftp: 90 4 ftp-data: 1 97 http: 2085 256 http2: 2085 256 imap: 35 118 irc: 5 2 kerberos: 5 0 ldap: 0 1 mysql: 3 0 netbios-dgm: 1 1 netbios-ns: 4 3 netbios-ssn: 69 17 nntp: 2 0 pop3: 23 118 rdp: 5 0 sip: 5 5 smtp: 130 2 snmp: 18 7 ssdp: 3 0 ssl: 20 42 sunrpc: 68 4 telnet: 12 6 tftp: 1 0 wins: 1 0 total: 4708 952 -------------------------------------------------- fast pattern groups src: 59 dst: 158 any: 4 to_server: 47 to_client: 34 -------------------------------------------------- search engine instances: 302 patterns: 7522 pattern chars: 122098 num states: 82566 num match states: 7154 memory scale: MB total memory: 2.58907 pattern memory: 0.403095 match list memory: 0.91655 transition memory: 1.23256 fast pattern only: 4971 -------------------------------------------------- pcap DAQ configured to passive. Snort successfully validated the configuration (with 0 warnings). o")~ Snort exiting |
6. Create custom local rules
|
1 2 3 |
# vi /usr/local/etc/rules/local.rules alert icmp any any -> $HOME_NET any (msg:"ICMP connection test"; sid:1000001; rev:1;) |
7. Verification of settings
Use parameter -T to test configuration and enable test mode
|
1 |
# snort -T -c /usr/local/etc/snort/snort.lua -R /usr/local/etc/rules/local.rules --daq-dir /usr/local/lib/daq -i ens160 -l /var/log/snort |
Next, run the test by executing the following command
|
1 |
# snort -c /usr/local/etc/snort/snort.lua -R /usr/local/etc/rules/local.rules --daq-dir /usr/local/lib/daq -i ens160 -l /var/log/snort -A alert_fast -s 65535 -k none |
When pinging this server from another PC in the same local network, an alert line is written on the console screen of this server as shown below.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
Commencing packet processing ++ [0] ens160 10/21-13:10:54.553804 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:54.553804 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:54.553965 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:55.568608 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:55.568609 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:55.568658 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:55.568720 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:56.582194 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:56.582194 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:56.582265 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:56.582359 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:57.594268 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:57.594268 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.22 -> 192.168.11.83 10/21-13:10:57.594326 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 10/21-13:10:57.594410 [**] [1:1000001:1] "ICMP connection test" [**] [Priority: 0] [AppID: ICMP] {ICMP} 192.168.11.83 -> 192.168.11.22 |
Settings for writing to log files
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
# vi /usr/local/etc/snort/snort.lua # Line 251 : Uncomment and add in the "-- 7. configure outputs" section -- event logging -- you can enable with defaults from the command line with -A -- uncomment below to set non-default configs --alert_csv = { } alert_fast = { file = true, packet = false, limit = 10, } --alert_full = { } --alert_sfsocket = { } --alert_syslog = { } --unified2 = { } |
An alert_fast.txt file is created in the log directory
Perform syntax check
|
1 |
# snort -c /usr/local/etc/snort/snort.lua --daq-dir /usr/local/lib/daq |
Now, instead of the -A alert_fast option, add the option -l /var/log/snort to specify the log directory
|
1 |
# snort -c /usr/local/etc/snort/snort.lua -R /usr/local/etc/rules/local.rules --daq-dir /usr/local/lib/daq -i ens160 -s 65535 -k none -l /var/log/snort/ |
When I pinged the server again from another PC in the same network, this time nothing appeared on the console screen, but
Checking the log directory, an alert_fast.txt file has been created
To check the alert_fast.txt file
|
1 |
# tail -f /var/log/snort/alert_fast.txt |
Include local rules in snort.lua
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
# vi /usr/local/etc/snort/snort.lua # Line 197 : Add ips = { -- use this to enable decoder and inspector alerts --enable_builtin_rules = true, -- use include for rules files; be sure to set your path -- note that rules files can include other rules files -- (see also related path vars at the top of snort_defaults.lua) variables = default_variables, rules = [[ include $RULE_PATH/snort3-community-rules/snort3-community.rules include $RULE_PATH/local.rules ]] } |
8. Create user for Snort
Create a non-login system user account for Snort
|
1 |
# useradd -r -s /usr/sbin/nologin -M -c SNORT_IDS snort |
9. Create systemd service unit for Snort
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
# vi /etc/systemd/system/snort3.service Describe the following [Unit] Description=Snort Daemon After=syslog.target network.target [Service] Type=simple ExecStart=/usr/local/bin/snort --daq-dir /usr/local/lib/daq -c /usr/local/etc/snort/snort.lua -s 65535 -k none -l /var/log/snort -D -i ens160 -m 0x1b -u snort -g snort ExecStop=/bin/kill -9 $MAINPID [Install] WantedBy=multi-user.target |
Reload systemd configuration
|
1 |
# systemctl daemon-reload |
Set ownership and permissions for log files
|
1 2 |
# chmod -R 5775 /var/log/snort # chown -R snort:snort /var/log/snort |
Enable Snort to start and run at system startup
|
1 2 |
# systemctl enable --now snort3 Created symlink /etc/systemd/system/multi-user.target.wants/snort3.service → /etc/systemd/system/snort3.service. |
status check
|
1 2 3 4 5 6 7 8 9 10 11 12 |
# systemctl status snort3 ● snort3.service - Snort Daemon Loaded: loaded (/etc/systemd/system/snort3.service; enabled; preset:> Active: active (running) since Sat 2023-10-21 13:23:18 JST; 7s ago Main PID: 65125 (snort) Tasks: 2 (limit: 23011) Memory: 271.7M CPU: 742ms CGroup: /system.slice/snort3.service mq65125 /usr/local/bin/snort --daq-dir /usr/local/lib/daq -c> Oct 21 13:23:18 Lepard systemd[1]: Started Snort Daemon. |
Tripwire
1.Install
|
1 |
# dnf install tripwire -y |
2.Passphrase setting
Set site passphrase and local passphrase
|
1 |
# tripwire-setup-keyfiles |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
---------------------------------------------- The Tripwire site and local passphrases are used to sign a variety of files, such as the configuration, policy, and database files. Passphrases should be at least 8 characters in length and contain both letters and numbers. See the Tripwire manual for more information. ---------------------------------------------- Creating key files... (When selecting a passphrase, keep in mind that good passphrases typically have upper and lower case letters, digits and punctuation marks, and are at least 8 characters in length.) Enter the site keyfile passphrase: ←Enter any "Site Passphrase" Verify the site keyfile passphrase: ←Enter "Site Passphrase" again Generating key (this may take several minutes)...Key generation complete. (When selecting a passphrase, keep in mind that good passphrases typically have upper and lower case letters, digits and punctuation marks, and are at least 8 characters in length.) Enter the local keyfile passphrase: ←Enter any "Local Passphrase" Verify the local keyfile passphrase: ←Enter "Local Passphrase" again Generating key (this may take several minutes)...Key generation complete. ---------------------------------------------- Signing configuration file... Please enter your site passphrase: ←Enter "Site Passphrase" Wrote configuration file: /etc/tripwire/tw.cfg A clear-text version of the Tripwire configuration file: /etc/tripwire/twcfg.txt has been preserved for your inspection. It is recommended that you move this file to a secure location and/or encrypt it in place (using a tool such as GPG, for example) after you have examined it. ---------------------------------------------- Signing policy file... Please enter your site passphrase: ←Enter "Site Passphrase" Wrote policy file: /etc/tripwire/tw.pol A clear-text version of the Tripwire policy file: /etc/tripwire/twpol.txt ～abbreviation～ default values from the current configuration file are used. |
3.Tripwire Configuration
①Configuration File Edit
|
1 2 3 4 5 6 7 8 |
# vi /etc/tripwire/twcfg.txt Line 9 LOOSEDIRECTORYCHECKING =false Change LOOSEDIRECTORYCHECKING =true Line 12 REPORTLEVEL =3 Change REPORTLEVEL =4 |
②Create a Tripwire configuration file (cryptographically signed version)
|
1 2 3 |
# twadmin -m F -c /etc/tripwire/tw.cfg -S /etc/tripwire/site.key /etc/tripwire/twcfg.txt Please enter your site passphrase: ←Enter site passphrase Wrote configuration file: /etc/tripwire/tw.cfg |
③Delete Tripwire configuration file (text version)
|
1 |
# rm -f /etc/tripwire/twcfg.txt |
④Policy File Settings
|
1 2 |
# cd /etc/tripwire/ # vi twpolmake.pl |
Contents of twpolmake.pl
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 |
#!/usr/bin/perl $POLFILE=$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) ; |
⑤Policy File Optimizations
|
1 |
# perl /etc/tripwire/twpolmake.pl /etc/tripwire/twpol.txt > /etc/tripwire/twpol.txt.new |
⑥Create policy file (cryptographically signed version) based on optimized policy file
|
1 2 3 |
# twadmin -m P -c /etc/tripwire/tw.cfg -p /etc/tripwire/tw.pol -S /etc/tripwire/site.key /etc/tripwire/twpol.txt.new Please enter your site passphrase: ←Enter local passphrase Wrote policy file: /etc/tripwire/tw.pol |
⑦Create database and check operation
|
1 2 |
# tripwire -m i -s -c /etc/tripwire/tw.cfg Please enter your local passphrase: ←Enter local passphrase |
Create test files
|
1 |
# echo test > /root/test.txt |
Check Tripwire operation
|
1 |
# tripwire -m c -s -c /etc/tripwire/tw.cfg |
The following is displayed and test.txt is detected
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 |
Open Source Tripwire(R) 2.4.3.7 Integrity Check Report Report generated by: root Report created on: Sat 21 Oct 2023 01:29:35 PM JST Database last updated on: Never =============================================================================== Report Summary: =============================================================================== Host name: Lepard Host IP address: 192.168.11.83 Host ID: None Policy file used: /etc/tripwire/tw.pol Configuration file used: /etc/tripwire/tw.cfg Database file used: /var/lib/tripwire/Lepard.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 Operating System Utilities 100 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) 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 Security Control 100 0 0 0 Login Scripts 100 0 0 0 Critical configuration files 100 0 0 0 * Root config files 100 1 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: 52251 Total violations found: 2 =============================================================================== Object Summary: =============================================================================== ------------------------------------------------------------------------------- # Section: Unix File System ------------------------------------------------------------------------------- ------------------------------------------------------------------------------- Rule Name: Tripwire Data Files (/var/lib/tripwire) Severity Level: 100 ------------------------------------------------------------------------------- Added: "/var/lib/tripwire/Lepard.twd" ------------------------------------------------------------------------------- Rule Name: Root config files (/root) Severity Level: 100 ------------------------------------------------------------------------------- Added: "/root/test.txt" =============================================================================== Error Report: =============================================================================== No Errors ------------------------------------------------------------------------------- *** End of report *** Open Source Tripwire 2.4 Portions copyright 2000-2018 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. |
Delete test files
|
1 |
# rm -f /root/test.txt |
⑧Tripwire Scheduled Scripts
|
1 2 |
# cd /var/www/system # vi tripwire.sh |
Contents of tripwire.sh
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
#!/bin/bash PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin # Passphrase setting LOCALPASS= ←local passphrase SITEPASS= ←site passphrase cd /etc/tripwire # Tripwire check run tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" root # Policy File Modernization twadmin -m p -c tw.cfg -p tw.pol -S site.key > twpol.txt perl twpolmake.pl twpol.txt > twpol.txt.new twadmin -m P -c tw.cfg -p tw.pol -S site.key -Q $SITEPASS twpol.txt.new > /dev/null rm -f twpol.txt* *.bak # Database modernization rm -f /usr/local/tripwire/lib/tripwire/*.twd* tripwire -m i -s -c tw.cfg -P $LOCALPASS |
⑨Tripwire Autorun Script Execution Settings
|
1 |
# chmod 700 tripwire.sh |
Subscribe to cron and run it periodically
|
1 2 |
# crontab -e 0 3 * * * /var/www/system/tripwire.sh |
Reference: Script for reporting results by e-mail
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
#!/bin/bash PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin # Passphrase setting LOCALPASS=xxxxx # local passphrase SITEPASS=xxxxx # site passphrase # Designation of e-mail address to be notified MAIL="<your mailaddress> " cd /etc/tripwire # Tripwire check run tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" $MAIL # Policy File Modernization twadmin -m p -c tw.cfg -p tw.pol -S site.key > twpol.txt perl twpolmake.pl twpol.txt > twpol.txt.new twadmin -m P -c tw.cfg -p tw.pol -S site.key -Q $SITEPASS twpol.txt.new > /dev/null rm -f twpol.txt* *.bak # Database modernization rm -f /usr/local/tripwire/lib/tripwire/*.twd* tripwire -m i -s -c tw.cfg -P $LOCALPASS |
Execute the following command to confirm that the mail has been received
|
1 |
# /var/www/system/tripwire.sh |