Contents
Snort3 インストール
Snortは、IPネットワーク上でリアルタイムのトラフィック分析とパケットロギングを実行できるオープンソースのネットワーク侵入検知システムです。
「プロトコル分析」「コンテンツ検索」「マッチング」を実行でき、「バッファオーバーフロー」「ステルスポートスキャン」「CGI攻撃」「SMBプローブ」「OSフィンガープリント試行」「セマンティックURL攻撃」「サーバメッセージブロック探査」など、さまざまな攻撃検出に使用できます。
MiracleLinux9はSnort3リポジトリがありませんので、ソースコードからSnort3をビルド、コンパイルしてインストールします
1. 事前準備
①ビルドとインストールに必要なビルドツールと依存関係のあるライブラリーをインストール。
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# 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 |
libsafec-develはEPELリポジトリーにありませんのて゛CERT Forensics Toolsリポジトリーをインストールして
libsafec-develをインストールします
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# 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のインストール作業ディレクトリー作成
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# mkdir snort_src && cd snort_src |
③DAQのダウンロード、インストール
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# git clone https://github.com/snort3/libdaq.git # cd libdaq # ./bootstrap # ./configure # make # make install |
④Tcmallocインストール
メモリ使用量の増加時の速度が向上のためgperftoolsインストール
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# 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 ダウンロード、インストール
①Snort3をダウンロードしてインストール
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# 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 |
②共有ライブラリを更新
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# ln -s /usr/local/lib/libtcmalloc.so.4 /lib/ # ln -s /usr/local/lib/libdaq.so.3 /lib/ # ldconfig |
バージョンを確認
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# 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. ネットワークインターフェースカードの設定
①ネットワークインターフェイスカードを構成
※以下「ens160」の箇所は各自の環境に合わす
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# 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 |
Snortが1518バイトを超える大きなパケットを切り捨てないよう、インターフェイスオフロードを無効にする
現状の確認
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# ethtool -k ens160 | grep receive-offload generic-receive-offload: on large-receive-offload: on |
GRO,LROがonになっているのてこれを無効にする
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# ethtool -K ens160 gro off lro off |
システムの再起動後も変更が反映するように、systemdサービスを作成して有効にする
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# vi /etc/systemd/system/snort3-promisc.service |
snort3-promisc.serviceの内容
[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
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# 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.コミュニティルールの使用
今回はコミュニティールールをセットします
①Snort Rulesディレクトリを作成
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# mkdir /usr/local/etc/rules |
➁Snort 3ダウンロードページからSnort 3コミュニティルールをダウンロード
ルールを抽出し、構成フォルダーにコピー
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# wget -qO- https://www.snort.org/downloads/community/snort3-community-rules.tar.gz | tar xz -C /usr/local/etc/rules/ |
構成フォルダーの中を確認する
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# ls -1 /usr/local/etc/rules/snort3-community-rules/ AUTHORS LICENSE sid-msg.map snort3-community.rules VRT-License.txt |
5. メイン設定ファイル編集
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# vi /usr/local/etc/snort/snort.lua # 24行目 : 自ネットワークに変更 HOME_NET = '192.168.11.0/24' # 28行目 : 変更 EXTERNAL_NET = '!$HOME_NET' |
ルールへのパスを更新
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# vi /usr/local/etc/snort/snort.lua # 193行目あたり : 追記 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 インストール
Snort 3のダウンロードページからSnort OpenAppIDをダウンロードしインストール
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# wget https://www.snort.org/downloads/openappid/33380 -O OpenAppId-33380.tgz # tar -xzvf OpenAppId-33380.tgz # cp -R odp /usr/local/lib/ |
snort 3設定ファイルを編集し、OpenAppIDライブラリの場所を定義
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# vi /usr/local/etc/snort/snort.lua # 101行目あたり : 追記 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, } |
ログディレクトリー作成
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# mkdir /var/log/snort |
構成のチェック
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# snort -c /usr/local/etc/snort/snort.lua --daq-dir /usr/local/lib/daq |
チェックの結果次のように表示されればOK
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-------------------------------------------------- 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. カスタムローカルルールを作成
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# vi /usr/local/etc/rules/local.rules alert icmp any any -> $HOME_NET any (msg:"ICMP connection test"; sid:1000001; rev:1;) |
7. 設定の検証
パラメーター -T を使用して構成をテストし、テスト・モードを使用可能にします
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# 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 |
次に、以下のコマンドを実行してテストを実行する
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# 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 |
同じローカルネットワーク内の別のPCから本サーバーにpingを実行すると、下記のように本サーバーコンソール画面ににアラート行が書き出される
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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 |
ログファイルに書き込む設定
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# vi /usr/local/etc/snort/snort.lua # 251行目 : 「-- 7. configure outputs」セクション内でコメント解除して追記 -- 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 = { } |
ログディレクトリーにalert_fast.txt ファイルが作成される
構文チェックを実行
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# snort -c /usr/local/etc/snort/snort.lua --daq-dir /usr/local/lib/daq |
今度は、-A alert_fastというオプションはつけずに、-l /var/log/snortというログ・ディレクトリを指定するオプションをつけ実行する
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# 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/ |
再度、同じネットワーク内の別のPCからサーバーにpingすると今度はコンソール画面には何も表示されないが
ログディレクトリを確認すると、 alert_fast.txt ファイルが作成されました
alert_fast.txt ファイルを確認するには
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# tail -f /var/log/snort/alert_fast.txt |
ローカルルールをsnort.luaに含める
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# vi /usr/local/etc/snort/snort.lua # 197行目 : 追記 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. Snort用のユーザー作成
Snort用の非ログイン システム ユーザー アカウントを作成
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# useradd -r -s /usr/sbin/nologin -M -c SNORT_IDS snort |
9. Snort用のsystemdサービスユニットを作成
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# vi /etc/systemd/system/snort3.service 下記内容を記述 [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 |
systemdの設定をリロードする
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# systemctl daemon-reload |
ログファイルの所有権と権限を設定
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# chmod -R 5775 /var/log/snort # chown -R snort:snort /var/log/snort |
システム起動時にSnortを起動し、実行できるようにする
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# systemctl enable --now snort3 Created symlink /etc/systemd/system/multi-user.target.wants/snort3.service → /etc/systemd/system/snort3.service. |
ステータスチェック
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# 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 インストール
1.インストール
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# dnf install tripwire -y |
2.初期設定
サイトパスフレーズとローカルパスフレーズを設定する
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# tripwire-setup-keyfiles |
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---------------------------------------------- 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: ←任意の「サイトパスフレーズ」を入力 Verify the site keyfile passphrase: ←再度任意の「サイトパスフレーズ」を入力 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: ←任意の「ローカルパスフレーズ」を入力 Verify the local keyfile passphrase: ←再度任意の「ローカルパスフレーズ」を入力 Generating key (this may take several minutes)...Key generation complete. ---------------------------------------------- Signing configuration file... Please enter your site passphrase: ←「サイトパスフレーズ」を入力 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: ←「サイトパスフレーズ」を入力 Wrote policy file: /etc/tripwire/tw.pol A clear-text version of the Tripwire policy file: /etc/tripwire/twpol.txt ～中略～ default values from the current configuration file are used. |
3.Tripwire の設定
①設定ファイル編集
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# vi /etc/tripwire/twcfg.txt ●9 行目 LOOSEDIRECTORYCHECKING =false を LOOSEDIRECTORYCHECKING =true に変更 ●12 行目 REPORTLEVEL =3 を REPORTLEVEL =4 に変更 レベル4 にすることで「0 」～「4 」までの5 段階中、最も詳細なレポートが表示されます。 |
②Tripwire 設定ファイル(暗号署名版)を作成
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# twadmin -m F -c /etc/tripwire/tw.cfg -S /etc/tripwire/site.key /etc/tripwire/twcfg.txt Please enter your site passphrase: ←設定したサイトパスフレーズを入力 Wrote configuration file: /etc/tripwire/tw.cfg |
③Tripwire 設定ファイル(テキスト版)削除
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# rm -f /etc/tripwire/twcfg.txt |
④ポリシーファイル設定
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# cd /etc/tripwire/ # vi twpolmake.pl |
twpolmake.plの内容
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#!/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) ; |
⑤ポリシーファイル最適化
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# perl /etc/tripwire/twpolmake.pl /etc/tripwire/twpol.txt > /etc/tripwire/twpol.txt.new |
⑥最適化済ポリシーファイルを元に、ポリシーファイル(暗号署名版)作成
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# 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: ←サイトパスフレーズを入力 Wrote policy file: /etc/tripwire/tw.pol |
⑦データベースを作成、動作確認
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# tripwire -m i -s -c /etc/tripwire/tw.cfg Please enter your local passphrase: ←設定したローカルパスフレーズを入力 |
テスト用ファイルを作成
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# echo test > /root/test.txt |
Tripwire の動作確認
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# tripwire -m c -s -c /etc/tripwire/tw.cfg |
下記のように表示され、test.txtが検出されている
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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. |
テスト用ファイルを削除
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# rm -f /root/test.txt |
⑧Tripwire 定期実行スクリプト作成
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# cd /var/www/system # vi tripwire.sh |
tripwire.shの内容
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#!/bin/bash PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin # パスフレーズ設定 LOCALPASS= ←ローカルパスフレーズ SITEPASS= ←サイトパスフレーズ cd /etc/tripwire # Tripwireチェック実行 tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" root # ポリシーファイル最新化 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 # データベース最新化 rm -f /usr/local/tripwire/lib/tripwire/*.twd* tripwire -m i -s -c tw.cfg -P $LOCALPASS |
⑨Tripwire 自動実行スクリプト実行権限
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# chmod 700 tripwire.sh |
cron に登録して、定期的に実行する
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# crontab -e 0 3 * * * /var/www/system/tripwire.sh |
参考: メールで結果報告用スクリプト
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#!/bin/bash PATH=/usr/sbin:/usr/bin:/bin:/usr/local/tripwire/sbin # パスフレーズ設定 LOCALPASS=xxxxx # ローカルキーパスフレーズ SITEPASS=xxxxx # サイトキーパスフレーズ #通知先メールアドレス指定 MAIL="<your mailaddress> " cd /etc/tripwire # Tripwireチェック実行 tripwire -m c -s -c tw.cfg|mail -s "Tripwire(R) Integrity Check Report in `hostname`" $MAIL # ポリシーファイル最新化 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 # データベース最新化 rm -f /usr/local/tripwire/lib/tripwire/*.twd* tripwire -m i -s -c tw.cfg -P $LOCALPASS |
下記コマンド を実行し、設定したメールアドレスに通知が来ていることを確認する
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# /var/www/system/tripwire.sh |