~~ODT~~ FIXME ====== Features ====== * **ipsets** basierend auf zB: **Hostnamen** d.h. iptables Freigaben oder Blocks können auf **Domain** bzw. **Hostnamen** Ebene durchgeführt werden im Unterschied zu "nativem" iptables * **ipsets** basierend auf **CIDR Netznotationen** * **ipsets** basierend auf **Einzel IPs** * Implementierung von **http://iplists.firehol.org/** basierend auf ihrem bash Skript (**https://github.com/firehol/blocklist-ipsets**) * Pi-Hole Minimal für Blacklists {{ :know-how:pihole-minimal.tar |}} FIXME ====== Voraussetzungen ====== * Minimale Requirements mit {{ :know-how:update-ipsets.tar |}} auf jeden Fall wird **iprange** benötigt * Für ** /usr/share/netfilter-persistent/plugins.d# ** {{ :know-how:iptables-scripts.zip |}} , Originalmodule löschen * **dnsmasq** zum aktualisieren von den Domain/Hostname basierenden IP Sets * zB: auf Debian Stretch: apt-get install ipset netfilter-persistent iptables iptables-persistent dnsmasq ====== Anpassungen ====== ===== Verzeichnisse u. Dateien ===== * Grundsätzlicher Aufbau root@mrBox-x:/etc/iptables# ls -al /etc/iptables/ total 60 drwxr-x--- 5 root root 4096 Sep 29 11:42 . drwxr-xr-x 91 root root 4096 Nov 22 10:08 .. drwxr-x--- 2 root root 4096 Dec 8 2017 ipset-dns.v4 drwxr-x--- 2 root root 4096 Sep 29 11:15 ipset-ips.v4 drwxr-x--- 2 root root 4096 Sep 29 11:28 ipset-networks.v4 -rw-r----- 1 root root 9291 Sep 29 11:42 rules-new.v4 -rw-r----- 1 root root 6353 Dec 8 2017 rules-new.v6 -rw-r----- 1 root root 9291 Sep 29 11:43 rules.v4 -rw-r----- 1 root root 6353 Dec 8 2017 rules.v6 root@mrBox-x:~# ls -al /usr/share/netfilter-persistent/plugins.d/ total 16 drwxr-xr-x 2 root root 4096 Nov 22 10:19 . drwxr-xr-x 3 root root 4096 Mar 24 2016 .. -rwx------ 1 root root 3902 Sep 29 11:31 40-ip4tables -rwx------ 1 root root 2078 Mar 18 2017 60-ip6tables root@mrBox-x:~# ls -al /usr/local/sbin/update-ipsets/ total 324 drwxr-sr-x 2 root staff 4096 Sep 29 11:29 . drwxrwsr-x 3 root staff 4096 Sep 29 11:26 .. -rw-r--r-- 1 root staff 70 May 2 2018 commands.txt -rw-r--r-- 1 root staff 2095 May 2 2018 functions.common -rw-r--r-- 1 root staff 2346 May 2 2018 install.config -rwxr--r-- 1 root staff 310196 May 2 2018 update-ipsets.sh root@mrBox-x:/etc/cron.d# cat update-ipset SHELL=/bin/bash PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games */15 * * * * root /usr/local/sbin/update-ipsets/update-ipsets.sh --silent &> /dev/null * Firewall IPv4 Beispiel FIXME: # Generated by iptables-save v1.4.12 on Mon Oct 14 15:11:00 2013 *raw :PREROUTING ACCEPT [60:6158] :OUTPUT ACCEPT [0:0] -A PREROUTING -i eth0 -s 10.0.0.0/8 -j RETURN -A PREROUTING -i eth0 -s 192.168.0.0/16 -j RETURN -A PREROUTING -i eth0 -s 172.16.0.0/12 -j RETURN -A PREROUTING -i eth0 -m set --match-set firehol_level1 src -m limit --limit 5/sec -j LOG --log-prefix "fw firehol_level1 DROP: " --log-level 7 -A PREROUTING -i eth0 -m set --match-set firehol_level1 src -j DROP -A PREROUTING -i eth0 -m set --match-set firehol_level2 src -m limit --limit 5/sec -j LOG --log-prefix "fw firehol_level2 DROP: " --log-level 7 -A PREROUTING -i eth0 -m set --match-set firehol_level2 src -j DROP COMMIT *nat :PREROUTING ACCEPT [1:84] :INPUT ACCEPT [1:84] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p udp --dport 53 -m limit --limit 5/sec -j LOG --log-prefix "fw DNS REDIRECT: " --log-level 7 -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p udp --dport 53 -j REDIRECT --to 53 -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p tcp -m tcp --dport 53 -m limit --limit 5/sec -j LOG --log-prefix "fw DNS REDIRECT: " --log-level 7 -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p tcp -m tcp --dport 53 -j REDIRECT --to 53 -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p tcp -m tcp --dport 80 -m limit --limit 5/sec -j LOG --log-prefix "fw HTTP REDIRECT: " --log-level 7 -A PREROUTING ! -d 192.168.1.1/32 -i br0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 8081 -A POSTROUTING -o eth0 -j MASQUERADE COMMIT # Completed on Mon Oct 14 15:11:00 2013 # Generated by iptables-save v1.4.12 on Mon Oct 14 15:11:00 2013 *mangle :PREROUTING ACCEPT [348:36659] :INPUT ACCEPT [348:36659] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [252:78891] :POSTROUTING ACCEPT [252:78891] COMMIT # Completed on Mon Oct 14 15:11:00 2013 # Generated by iptables-save v1.4.12 on Mon Oct 14 15:11:00 2013 *filter :INPUT DROP [0:0] :FORWARD DROP [0:0] :OUTPUT DROP [0:0] :ALLOW - [0:0] :EXT-FW - [0:0] :EXT-INT - [0:0] :FW-EXT - [0:0] :FW-INT - [0:0] :GARBAGE - [0:0] :INT-EXT - [0:0] :INT-FW - [0:0] -A INPUT -i lo -j ACCEPT -A INPUT -i eth0 -j EXT-FW -A INPUT -i br0 -j INT-FW -A INPUT -j GARBAGE -A INPUT -m limit --limit 5/sec -j LOG --log-prefix "fw INPUT DROP: " --log-level 7 -A INPUT -j DROP -A FORWARD -i br0 -o eth0 -j INT-EXT -A FORWARD -i eth0 -o br0 -j EXT-INT -A FORWARD -j GARBAGE -A FORWARD -m limit --limit 5/sec -j LOG --log-prefix "fw FORWARD DROP: " --log-level 7 -A FORWARD -j DROP -A OUTPUT -o lo -j ACCEPT -A OUTPUT -o eth0 -j FW-EXT -A OUTPUT -o br0 -j FW-INT -A OUTPUT -j GARBAGE -A OUTPUT -m limit --limit 5/sec -j LOG --log-prefix "fw OUTPUT DROP: " --log-level 7 -A OUTPUT -j DROP -A ALLOW -m limit --limit 5/sec -j LOG --log-prefix "fw ALLOW ACCEPT: " --log-level 7 -A ALLOW -j ACCEPT -A EXT-FW -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A EXT-FW -p icmp -m icmp --icmp-type 8 -j ALLOW -A EXT-FW -j GARBAGE -A EXT-FW -m limit --limit 5/sec -j LOG --log-prefix "fw EXT-FW DROP: " --log-level 7 -A EXT-FW -j DROP -A EXT-INT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A EXT-INT -j GARBAGE -A EXT-INT -m limit --limit 5/sec -j LOG --log-prefix "fw EXT-INT DROP: " --log-level 7 -A EXT-INT -j DROP -A FW-EXT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FW-EXT -p tcp -m tcp --dport 80 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A FW-EXT -p tcp -m tcp --dport 443 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A FW-EXT -p icmp -m icmp --icmp-type 8 -j ALLOW -A FW-EXT -p udp -m udp --dport 67 -j ALLOW -A FW-EXT -p tcp -m tcp --dport 587 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A FW-EXT -p udp -m udp --dport 123 -j ALLOW -A FW-EXT -p udp -m udp --dport 53 -j ALLOW -A FW-EXT -p tcp -m tcp --dport 53 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A FW-EXT -p udp -m udp --dport 65194 -j ALLOW -A FW-EXT -m owner --uid-owner proxy -j ALLOW -A FW-EXT -j GARBAGE -A FW-EXT -m limit --limit 5/sec -j LOG --log-prefix "fw FW-EXT DROP: " --log-level 7 -A FW-EXT -j DROP -A FW-INT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A FW-INT -p udp -m udp --dport 68 -j ALLOW -A FW-INT -p icmp -m icmp --icmp-type 8 -j ALLOW -A FW-INT -j GARBAGE -A FW-INT -m limit --limit 5/sec -j LOG --log-prefix "fw FW-INT DROP: " --log-level 7 -A FW-INT -j DROP -A GARBAGE -d 224.0.0.1/32 -j DROP -A GARBAGE -d 255.255.255.255/32 -j DROP -A GARBAGE -d 224.0.0.251/32 -j DROP -A GARBAGE -p udp -m udp --dport 137 -j DROP -A GARBAGE -p udp -m udp --dport 138 -j DROP -A INT-EXT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A INT-EXT -p tcp --syn --dport 465 -j ALLOW -A INT-EXT -p tcp --syn --dport 587 -j ALLOW -A INT-EXT -p tcp --syn --dport 993 -j ALLOW -A INT-EXT -p tcp --syn --dport 995 -j ALLOW -A INT-EXT -p icmp -m icmp --icmp-type 8 -j ALLOW -A INT-EXT -m limit --limit 5/sec -j LOG --log-prefix "fw INT-EXT DROP: " --log-level 7 -A INT-EXT -j DROP -A INT-FW -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A INT-FW -p tcp -m tcp --dport 8080 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A INT-FW -p tcp -m tcp --dport 8081 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A INT-FW -p tcp -m tcp --dport 53 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A INT-FW -p tcp -m tcp --dport 80 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A INT-FW -p tcp -m tcp --dport 22 --tcp-flags FIN,SYN,RST,ACK SYN -j ALLOW -A INT-FW -p udp -m udp --dport 53 -j ALLOW -A INT-FW -p udp -m udp --dport 67 -j ALLOW -A INT-FW -p icmp -m icmp --icmp-type 8 -j ALLOW -A INT-FW -p udp -m udp --dport 123 -j ALLOW -A INT-FW -j GARBAGE -A INT-FW -m limit --limit 5/sec -j LOG --log-prefix "fw INT-FW DROP: " --log-level 7 -A INT-FW -j DROP COMMIT # Completed on Mon Oct 14 15:11:00 2013 ====== Backup Leitung ====== * Wenn der primäre Link offline geht wechsel zum Sekundären * Wenn der primäre Link offline war und "zurück" kommt wechsel wieder zum Primären * Wenn der primäre Link funktioniert gibt es keine Änderungen * **/usr/local/sbin/check_wan_links.sh** #!/bin/bash # Requirements: # IF primary link is down switch to secondary link if not already active # IF primary link is down and comes back switch to primary link # IF primary link is active and working do nothing PRIMARY_IP="82.149.97.213" SECONDARY_IP="192.168.29.2" PRIMARY_GATEWAY="82.149.97.1" SECONDARY_GATEWAY="192.168.29.1" function checkLink() { returnCode="1" /bin/ping -q -c 5 -I $1 8.8.8.8 >/dev/null || /bin/ping -q -c 5 -I $1 1.1.1.1 >/dev/null || /bin/ping -q -c 5 -I $1 9.9.9.9 >/dev/null || returnCode="0" echo $returnCode } function checkCurrentGateway() { default=$(/sbin/ip route get 8.8.8.8 | awk '{print $3}') echo $default } function setCurrentGateway() { /sbin/ip route change default via $1 echo "Default route changed to: $1" } linkPrimary=$(checkLink $PRIMARY_IP); currentGateway=$(checkCurrentGateway); #echo "Link Primary: $linkPrimary" #echo "Current Gateway: $currentGateway" [[ $linkPrimary == "0" && $currentGateway == $PRIMARY_GATEWAY ]] && setCurrentGateway $SECONDARY_GATEWAY [[ $linkPrimary == "1" && $currentGateway == $SECONDARY_GATEWAY ]] && setCurrentGateway $PRIMARY_GATEWAY exit 0 * Routing zB: **/etc/network/interfaces** #DREI Huawei Modem auto bond0.29 iface bond0.29 inet static up ip route add 192.168.29.0/24 dev bond0.29 table lte up ip route add default via 192.168.29.1 table lte up ip rule add from 192.168.92.2 lookup lte address 192.168.29.2 netmask 255.255.255.0 #EXT - kabelsignal AG auto eth2 iface eth2 inet static address 82.149.97.213 netmask 255.255.255.0 gateway 82.149.97.1 up ip route add 82.149.97.0/24 dev eth2 table kabsi up ip route add default via 82.149.97.1 table kabsi up ip rule add from 82.149.97.213 lookup kabsi ====== Gäste WLAN ====== * Gäste WLAN , das innerhalb der vorhandenen LAN Infrastruktur durchgereicht werden kann ohne komplexe VLAN Taggings * In Kombination mit zB: openwrt und openvpn möglich + Linux Firewall ===== Firewall Konfiguration ===== * Wir benötigen eine Bridge und OpenVPN * Verschlüsselung ist nicht notwendig ausschließlich Authentifizierung * DNSMASQ dient als DHCP Server * ** /etc/dnsmasq.conf ** .. dhcp-range=set:wlan,10.0.212.100,10.0.212.200,255.255.255.0,4h dhcp-option=tag:wlan,6,8.8.8.8,8.8.4.4 dhcp-option=tag:wlan,3,10.0.212.1 .. * **/etc/network/interfaces** ... #WLAN Guest Interface auto br-guest iface br-guest inet manual pre-up brctl addbr br-guest pre-up brctl stp br-guest off pre-up brctl setfd br-guest 0 pre-up ip addr add 10.0.212.1/24 brd + dev br-guest pre-up ip li set dev br-guest up ... * **/etc/openvpn/wlan-guest.conf** dev tap0 dev-type tap port 65190 proto udp mode server management 127.0.0.1 222 cd /etc/openvpn/wlan-guest cipher none server 172.24.240.0 255.255.255.0 dh dh2048.pem ca ca.crt cert firewall.crt key firewall.key status status.log client-config-dir ccd topology subnet tls-server keepalive 5 15 verb 3 multihome script-security 2 up /etc/openvpn/wlan-guest/add_tap.sh multihome * ** /etc/openvpn/wlan-guest/add_tap.sh ** #!/bin/bash brctl addif br-guest tap0 ===== Access Point Konfiguration ===== * ** /etc/config/network ** * **Achtung** in diesem Fall 2 VLANs die das interne und Gästenetz aufteilen auf entsprechende Ports ( in diesem Fall 841n TP-Link) config interface 'loopback' option ifname 'lo' option proto 'static' option ipaddr '127.0.0.1' option netmask '255.0.0.0' config interface 'guest' option ifname 'eth1.2' option type 'bridge' config interface 'intern' option ifname 'eth0 eth1.3' option proto 'dhcp' option type 'bridge' config switch option name 'switch0' option reset '1' option enable_vlan '1' config switch_vlan option device 'switch0' option vlan '3' option ports '0t 2 3' config switch_vlan option device 'switch0' option vlan '2' option ports '0t 1 4' * ** /etc/config/wireless ** config wifi-device radio0 option type mac80211 option channel auto option hwmode 11g option path 'platform/ar934x_wmac' option htmode HT20 list ht_capab LDPC list ht_capab SHORT-GI-20 list ht_capab SHORT-GI-40 list ht_capab TX-STBC list ht_capab RX-STBC1 list ht_capab DSSS_CCK-40 # REMOVE THIS LINE TO ENABLE WIFI: option disabled 0 config wifi-iface option device radio0 option network guest option mode ap option ssid SSID_GASTNETZWERK option encryption psk2 option key PSK_GASTNETZWERK * ** /etc/openvpn/client.conf ** client dev tap-guest dev-type tap cipher none proto udp remote firewall 65190 keepalive 5 10 resolv-retry infinite script-security 2 up /etc/openvpn/client/add_tap.sh nobind ca /etc/openvpn/client/ca.crt cert /etc/openvpn/client/wlanx.crt key /etc/openvpn/client/wlanx.key ns-cert-type server verb 3 * ** /etc/openvpn/client/add_tap.sh ** #!/bin/sh brctl addif br-guest tap-guest ====== rogue client workstation detection ====== * Getestet mit Debian 9 - **apt-get install arpalert** * Es soll eine Mail an root geschickt werden wenn ein unbekannter Client dem System hinzugefügt wird und zusätzlich noch wenn möglich ein Port Scan auf den Client durchgeführt werden * **grep -v ^# /etc/arpalert/arpalert.conf** maclist file = "/etc/arpalert/maclist.allow" maclist alert file = "/etc/arpalert/maclist.deny" maclist leases file = "/var/lib/arpalert/arpalert.leases" lock file = "/var/run/arpalert.pid" use syslog = true log level = 7 user = arpalert umask = 177 dump packet = false daemon = false dump inter = 5 catch only arp = true interface = "eth1" action on detect = "/usr/local/sbin/notifyArpalert.sh" mod on detect = "" mod config = "" execution timeout = 10 max alert = 20 dump black list = false dump white list = false dump new address = true mac timeout = 1555200 expire authorized mac addresses = false max entry = 1000000 anti flood interval = 5 anti flood global = 50 mac vendor file = "/etc/arpalert/oui.txt" log mac vendor = true alert mac vendor = true mod mac vendor = true log referenced address = false alert on referenced address = false mod on referenced address = false log deny address = true alert on deny address = true mod on deny address = true log new address = true alert on new address = true mod on new address = true log new mac address = true alert on new mac address = true mod on new mac address = true log ip change = true alert on ip change = false mod on ip change = true log mac change = true alert on mac change = false mod on mac change = true log unauth request = true alert on unauth request = true mod on unauth request = true ignore unknown sender = false ignore me = true ignore self test = true unauth ignore time method = 2 log request abus = true alert on request abus = true mod on request abus = true max request = 1000000 log mac error = true alert on mac error = true mod on mac error = true log flood = true alert on flood = true mod on flood = true log expire mac address = false alert on expire mac address = false mod on expire mac address = false * **/usr/local/sbin/notifyArpalert.sh** #!/bin/bash tmp_file=$(mktemp) ip_address="$2" mac_address="$1" params="$3" ethernet_device="$4" alert_type="$5" echo "Possible Intrusion Attempt" > $tmp_file echo "IP Address: $ip_address" >> $tmp_file echo "MAC Address: $mac_address" >> $tmp_file echo "Parameters: $params" >> $tmp_file echo "Alert Type: $alert_type" >> $tmp_file alert_explained=$(cat << EOF Alert Types: \n 0: ip change \n 1: mac address only detected but not in whithe list \n 2: mac address in black list \n 3: new mac address \n 4: unauthorized arp request \n 5: abusive number of arp request detected \n 6: ethernet mac address different from arp mac address \n 7: global flood detection \n 8: new mac adress without ip \n 9: mac change \n 10: mac expire \n EOF) echo -e $alert_explained >> $tmp_file echo "Nmap Scan: " >> $tmp_file ip route get $ip_address | grep -q eth1 ( [[ $? == 0 ]] && nmap -Pn $ip_address >> $tmp_file ) || echo "I'm not performing nmap on $ip_address" >> $tmp_file cat $tmp_file | mail -s "Possible Break in Attempt " root rm $tmp_file * ** /etc/arpalert/maclist.allow ** #KOMMENTAR GERÄT1 11:22:33:44:55:66 IP_GERÄT1 INTERFACE_NETZWERK ====== rogue dhcp server detection ====== ===== dhcp-probe ===== * FIXME - BUG beim Socket WAIT ?? - im Debugging "wartet" er für immer nach erster Runde * Es sollen DHCP Server gefunden werden , die sich in der aktuellen Broadcast Domain befinden, die nicht autorisiert sind * getestet auf Debian 9 mit **apt-get install dhcp-probe** * löschen von dhcp-probe init Skript **rm /etc/init.d/dhcp-probe** * Die Ausgabe wird nun geloggt über syslog mit Systemd * Systemd Unit **/lib/systemd/system/dhcp_probe\@.service** [Unit] Description=DHCP-Probe Instance %i After=network.target [Service] Type=simple ExecStart=/usr/sbin/dhcp_probe -f -d 11 -T %i #2020-08-12 cc: ExecStop not defined on purpose KillSignal=9 [Install] WantedBy=multi-user.target * Für interface eth1: * ln -s /lib/systemd/system/dhcp_probe\@.service /etc/systemd/system/multi-user.target.wants/dhcp_probe\@eth1.service * **/etc/dhcp_probe.cf** legal_server IP_DHCP_SERVER1 legal_server IP_DHCP_SERVER2 alert_program_name2 /usr/local/sbin/notifyDHCP.sh response_wait_time 10000 * ** /usr/local/sbin/notifyDHCP.sh ** #!/bin/bash tmp_file=$(mktemp) # -I the name of the interface on which the unexpected response packet was received # -i the IP source address of the packet # -m Ethernet source address of the packet ip_address="NONE" mac_address="NONE" ethernet_device="NONE" program_id="NONE" while getopts ":I:i:m:p:" arg; do case "$arg" in I) ethernet_device=$OPTARG ;; i) ip_address=$OPTARG ;; m) mac_address=$OPTARG ;; p) program_id=$OPTARG ;; *) ;; esac done echo "Possible Rogue DHCP Server" > $tmp_file echo "IP Address: $ip_address" >> $tmp_file echo "MAC Address: $mac_address" >> $tmp_file echo "Ethernet Device: $ethernet_device" >> $tmp_file echo "Nmap Scan: " >> $tmp_file ip route get $ip_address | grep -q eth1 ( [[ $? == 0 ]] && nmap -Pn $ip_address >> $tmp_file ) || echo "I'm not performing nmap on $ip_address" >> $tmp_file cat $tmp_file | mail -s "POSSIBLE rogue DHCP SERVER " root rm $tmp_file ===== dhclient Skript ===== * Getestet unter Debian 9 * Wir lassen den offiziellen DHCP Client **dhclient** eine Lease über das Interface %i zb. eth1 holen und triggern sobald er die IP setzen sollte **/usr/local/sbin/triggerDHCPLease.sh** Das Renewal setzen wir auf 300 Sekunden **/usr/local/sbin/triggerDHCPLease.sh** - Wenn die lease von einem DHCP Server kommt , den wir nicht whitelisted haben rufe notfiyDHCP.sh auf scanne ggf. die IP mit nmap und sende ein Mail an root * **apt-get install isc-dhcp-client** * Systemd Service **cat /lib/systemd/system/dhcp-monitoring\@.service** [Unit] Description=DHCP-Monitoring Instance %i After=network.target [Service] Type=simple ExecStart=/sbin/dhclient -v -d -sf /usr/local/sbin/triggerDHCPLease.sh -cf /usr/local/etc/dhcp-monitoring/dhclient.conf -lf /dev/zero %i #2020-08-12 cc: ExecStop not defined on purpose KillSignal=9 [Install] WantedBy=multi-user.target * Für Netzwerinterface **eth1** starten * **ln -s /lib/systemd/system/dhcp-monitoring\@.service /etc/systemd/system/multi-user.target.wants/dhcp-monitoring\@eth1.service** ls -al /etc/systemd/system/multi-user.target.wants/dhcp-monitoring\@eth1.service lrwxrwxrwx 1 root root 44 Aug 12 13:35 /etc/systemd/system/multi-user.target.wants/dhcp-monitoring@eth1.service -> /lib/systemd/system/dhcp-monitoring@.service * **/usr/local/sbin/triggerDHCPLease.sh** #!/bin/bash WHITELISTED_DHCP_SERVERS="^(IP_DHCP_SERVER_1|IP_DHCP_SERVER2)$" #2020-08-12 cc: will be triggered from dhclient therefore certain variables have to exist #Variable new_dhcp_server_identifier must be present function bailout { echo -e "$1" exit 2 } [[ -v new_dhcp_server_identifier ]] || bailout "new_dhcp_server_identifier is not set - called by dhclient ? " echo $new_dhcp_server_identifier | grep -q -P "$WHITELISTED_DHCP_SERVERS" grepReturn=$? if [ $grepReturn != "0" ] then /usr/local/sbin/notifyDHCP.sh -i $new_dhcp_server_identifier fi exit 0 * **/usr/local/etc/dhcp-monitoring/dhclient.conf ** * https://stackoverflow.com/questions/29966496/dhclient-override-renewal-time#39931509 # man page for more information about the syntax of this file # and a more comprehensive list of the parameters understood by # dhclient. # # Normally, if the DHCP server provides reasonable information and does # not leave anything out (like the domain name, for example), then # few changes must be made to this file, if any. # option rfc3442-classless-static-routes code 121 = array of unsigned integer 8; send host-name = gethostname(); request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, domain-search, host-name, dhcp6.name-servers, dhcp6.domain-search, dhcp6.fqdn, dhcp6.sntp-servers, netbios-name-servers, netbios-scope, interface-mtu, rfc3442-classless-static-routes, ntp-servers; supersede dhcp-rebinding-time 300; supersede dhcp-lease-time 300; supersede dhcp-renewal-time 300; ====== VPN ====== ===== roadworker mfa - multiple factor auth ===== * Bei **OpenVPN** mit entsprechender Konfiguration wäre sie implizit gegeben wenn zB: ein Zertifikat zur Authentifizierung benutzt wird + Username + Password * OpenVPN Server - **roadworker-auth.conf**: ... auth-user-pass-verify /etc/openvpn/roadworker-auth/hybrid_auth.sh via-env script-security 3 ... * **/etc/openvpn/roadworker-auth/hybrid_auth.sh** #!/bin/bash function bailout () { echo $1 exit 1 } export username export password #env > /tmp/debug #echo "u: -$AUTH_USERNAME-" >> /tmp/debug #echo "p: -$AUTH_PASSWORD-" >> /tmp/debug ORIGINAL_PASSWORD="$password" AUTH_TOTP_SECRET="/etc/openvpn/roadworker-auth/totp/$username" echo $username | grep -P -q "^[A-Za-z0-9\.]+$" #2021-09-21 cc: Somehow malformed [[ $? != 0 ]] && bailout "Username malformed" [[ -f $AUTH_TOTP_SECRET && ${#password} -lt 7 ]] && bailout "TOTP is used but password is too small" #2021-09-21 cc: The last 6 digits contain the TOTP string / the rest is the password [[ -f $AUTH_TOTP_SECRET ]] && password=$(echo ${ORIGINAL_PASSWORD::-6}) /etc/openvpn/roadworker-auth/smb_auth.sh RET_SMB_AUTH=$? [[ ! -f $AUTH_TOTP_SECRET ]] && exit $? #echo "smb auth: $RET_SMB_AUTH" > /tmp/smb_auth [[ $RET_SMB_AUTH != 0 ]] && bailout "SMB Auth invalid" password=$(echo ${ORIGINAL_PASSWORD: -6}) /etc/openvpn/roadworker-auth/totp_auth.sh exit $? * **/etc/openvpn/roadworker-auth/smb_auth.sh** * Gültiger Account check via smb FIXME check username AUTH_USERNAME="$username" AUTH_PASSWORD="$password" AUTH_SERVER="SERVER_AUTH" [[ $AUTH_USERNAME == "" || $AUTH_USERNAME == " " ]] && AUTH_USERNAME="---" [[ $AUTH_PASSWORD == "" || $AUTH_USERNAME == " " ]] && AUTH_PASSWORD="---" #env > /tmp/debug #echo "u: -$AUTH_USERNAME-" >> /tmp/debug_smb #echo "p: -$AUTH_PASSWORD-" >> /tmp/debug_smb echo $AUTH_PASSWORD | /usr/bin/smbclient -mSMB3 --ip-address=$AUTH_SERVER --list=$AUTH_SERVER --user=$AUTH_USERNAME --timeout=5 &> /dev/null exit $? * **/etc/openvpn/roadworker-auth/totp_auth.sh** * TOTP Check mit **oathtool** #!/bin/bash function bailout () { echo $1 exit 1 } AUTH_USERNAME="$username" AUTH_PASSWORD="$password" AUTH_TOTP_SECRET="/etc/openvpn/roadworker-auth/totp/$AUTH_USERNAME" [[ $AUTH_USERNAME == "" || $AUTH_USERNAME == " " ]] && AUTH_USERNAME="---" [[ $AUTH_PASSWORD == "" || $AUTH_USERNAME == " " ]] && AUTH_PASSWORD="---" echo $AUTH_USERNAME | grep -P -q "^[A-Za-z0-9\.]+$" #2021-09-21 cc: Somehow malformed [[ $? != 0 ]] && bailout "Username malformed" #2021-09-21 cc: Somehow not 6 digits echo $AUTH_PASSWORD | grep -P -q "^[0-9]{6}$" [[ $? != 0 ]] && bailout "Digits malformed" #2021-09-21 cc: This is tricky , if there's no secret file - it hasn't been created yet so auth succeeds [[ ! -f $AUTH_TOTP_SECRET ]] && exit 0 TOTP_SEED=$(cat $AUTH_TOTP_SECRET) DIGIT_CODE=$(oathtool -b --totp $TOTP_SEED) #env > /tmp/debug #echo "u: -$AUTH_USERNAME-" >> /tmp/debug #echo "p: -$AUTH_PASSWORD-" >> /tmp/debug #echo "c: -$DIGIT_CODE" >> /tmp/debug [[ $DIGIT_CODE == $AUTH_PASSWORD ]] && exit 0 exit 1 * Um für bestimmten User **TOTP zu aktivieren** pwgen -0 -s -1 16 > /etc/openvpn/roadworker-auth/totp/username * Dieser TOTP Seed , der nun unter **/etc/openvpn/roadworker-auth/totp/username** zB: **ABCABCBABCBCDFFG** muss dem entsprechenden User **sicher** übermittelt werden zB: über Signal/Whatsapp - er kann ihn zB: im **Google Authenticator** als eigenen Eintrag hinzufügen * Variante um bei bestehender zertifikatsbasierender Authentifizierung OTP zu aktivieren: * **für bestimmtes Gerät d.h. Zertifikat ** wird es obligatorisch und User können zum Zertifikat spezifiziert werden * **/etc/openvpn/roadworker-cert/roadworker-cert.conf** ... auth-user-pass-verify /etc/openvpn/roadworker-cert/totp_auth.sh via-env auth-user-pass-optional script-security 3 .... * **/etc/openvpn/roadworker-cert/totp_auth.sh** #!/bin/bash function bailout () { echo $1 echo $1 | logger -t totp exit 1 } AUTH_USERNAME="$username" AUTH_PASSWORD="$password" AUTH_COMMON_NAME="$common_name" AUTH_TOTP_ROOT_SECRET="/etc/openvpn/roadworker-cert/totp/" AUTH_TOTP_SECRET="$AUTH_TOTP_ROOT_SECRET/$AUTH_COMMON_NAME/$AUTH_USERNAME" #2021-10-14 cc: Certificate required echo $common_name | grep -P -q "^[A-Za-z0-9\.\-]+$" [[ $? != 0 ]] && bailout "Common certificate Name malformed" #2021-10-14 cc: IF directory with common name does not exist OTP is not activated [[ ! -d "$AUTH_TOTP_ROOT_SECRET/$AUTH_COMMON_NAME" ]] && exit 0 echo $AUTH_USERNAME | grep -P -q "^[A-Za-z0-9\.]+$" #2021-09-21 cc: Somehow malformed [[ $? != 0 ]] && bailout "Username malformed" #2021-09-21 cc: Somehow not 6 digits echo $AUTH_PASSWORD | grep -P -q "^[0-9]{6}$" [[ $? != 0 ]] && bailout "Digits malformed" #2021-09-21 cc: This is tricky , if there's no secret file - it has been created yet so auth succeeds #2021-10-14 cc: If common_name root path exists there must be a file for the user [[ ! -f $AUTH_TOTP_SECRET ]] && bailout "TOTP Secret not found - is needed" TOTP_SEED=$(cat $AUTH_TOTP_SECRET) DIGIT_CODE=$(oathtool -b --totp $TOTP_SEED) #env > /tmp/debug #echo "u: -$AUTH_USERNAME-" >> /tmp/debug #echo "p: -$AUTH_PASSWORD-" >> /tmp/debug #echo "c: -$DIGIT_CODE" >> /tmp/debug [[ $DIGIT_CODE == $AUTH_PASSWORD ]] && exit 0 exit 1 ===== roadworker openvpn wake on lan (wol) trigger ===== * zB: bei Roadworkern die per Remote Desktop auf ihre Bürorechner zugreifen möchten / Die Bürorechner können ruhig heruntergefahren werden / Sobald eine erfolgreiche authentifizierte Verbindung aufgebaut wurde wird wol für den Rechner getriggered * **/etc/openvpn/roadworker.conf** (getestet auf Debian stretch) ... script-security 2 client-connect /usr/local/sbin/wake-on-vpn.sh ... * **/usr/local/sbin/wake-on-vpn.sh** #!/bin/bash case "$common_name" in COMMON_NAME_ROADWORKER) echo "Wake up Client associated with: $common_name" /usr/bin/wakeonlan -i IP_BROADCAST TARGET_MAC_ADDRESS | /usr/bin/logger -t roadworker ;; *) echo "No Client to wake up found: $common_name" | logger -t roadworker ;; esac exit 0 ===== roadworker strongswan ipsec ===== * FIXME Auth über radius server / Trigger bei strongswan für wake on lan * Getestet auf: **Ubuntu 18.04** * **/etc/ipsec.conf** * Verbindungsparameter wurden speziell auf Windows Rechner ausgerichtet , damit **IPSEC VPN** im Windows automatisch funktioniert - **Achtung** bei Windows wird die Default Route ersetzt , muss sich um ein "Feature" handeln egal ob bei **leftsubnet** nur das Zielnetz spezifiziert wird * CA Zertifikat muss für den **Computer** Zertifikatsstore importiert worden sein und **FQDN** muss matchen bei Verbindungsaufbau mit zB: **vpn.firewall.at** # ipsec.conf - strongSwan IPsec configuration file config setup #plutostart=no conn %default keyexchange=ikev2 ike=aes256-sha1-modp1024! esp=aes256-sha1! dpdaction=clear dpddelay=300s rekey=no conn roadworker left=%any leftsubnet=0.0.0.0/0 leftauth=pubkey leftcert=vpn.firewall.at.crt leftid=@vpn.firweall.at right=%any rightsourceip=172.16.3.0/24 rightauth=eap-radius eap_identity=%identity rightsendcert=never auto=add leftupdown=/usr/local/sbin/wakeup.sh * wake on lan (wol) bei erfolgreichem Login: **/usr/local/sbin/wakeup.sh** #!/bin/bash #Debugging: env > /tmp/env_wakeup #PLUTO_XAUTH_ID=ACCOUNTNAME@DOMAIN /usr/sbin/etherwake -i eth1 -b -D MAC_ADDRESS exit 0 ====== unbound ====== * Rekursiver DNS Resolver der DNSSEC validiert und auch dns over tls unterstützt ===== internal dns zone ===== * zB: wenn intern ein AD Server benutzt wird für interne Domäne server: .. .. #2024-02-11 cc: if pannoniait.intern was used by a e.g. windows ad server private-domain: pannoniait.intern domain-insecure: pannoniait.intern .. .. #2024-02-11 cc: If pannoniait.intern was used e.g. by windows ad server forward-zone: name: pannoniait.intern forward-addr: IP_DNS_SERVER ===== dns over tls ===== * führt zu massiven DNS Performanceeinbruch FIXME performance + prefetch usw. server: .. .. #2024-02-11 cc: The debian place where the bundle can be found tls-cert-bundle: "/etc/ssl/certs/ca-certificates.crt" .. .. forward-zone: name: "." forward-addr: 9.9.9.9@853#dns.quad9.net forward-addr: 149.112.112.112@853#dns.quad9.net forward-tls-upstream: yes .. .. ====== Traffic Shaping - tc ====== * FIXME - Großteil "man" Seiten https://wiki.archlinux.org/title/Advanced_traffic_control / https://tldp.org/en/Traffic-Control-HOWTO/ar01s06.html * FIXME - PLAYGROUND - für bestimmten Traffic Bandbreite insgesamt einschränken , damit zB: ein Pool von Adressen eingeschränkt werden kann wie zB: Windows Updates :) entweder über iptables Markierungen oder über ipset Matches #!/bin/sh -x # Maximum allowed downlink. Set to 90% of the achievable downlink in mbit DOWNLINK=60 # Interface facing the Internet EXTDEV=wlp2s0 # Load IFB, all other modules all loaded automatically modprobe ifb ip link set dev ifb0 down # Clear old queuing disciplines (qdisc) on the interfaces and the MANGLE table tc qdisc del dev $EXTDEV root 2> /dev/null > /dev/null tc qdisc del dev $EXTDEV ingress 2> /dev/null > /dev/null tc qdisc del dev ifb0 root 2> /dev/null > /dev/null tc qdisc del dev ifb0 ingress 2> /dev/null > /dev/null iptables -t mangle -F # appending "stop" (without quotes) after the name of the script stops here. if [ "$1" = "stop" ] then echo "Shaping removed on $EXTDEV." exit fi ip link set dev ifb0 up # HTB classes on IFB with rate limiting - default class 3:30 tc qdisc add dev ifb0 root handle 3: htb default 30 tc class add dev ifb0 parent 3:3 classid 3:30 htb rate 60mbit ceil 60mbit tc class add dev ifb0 parent 3:3 classid 3:33 htb rate 10mbit ceil 10mbit # Packets marked with "2" on IFB flow through class 3:33 tc filter add dev ifb0 parent 3:0 protocol ip handle 2 fw flowid 3:33 # Martin Devera, author of HTB, then recommends SFQ for beneath these classes: tc qdisc add dev ifb0 parent 3:30 handle 30: sfq perturb 10 tc qdisc add dev ifb0 parent 3:33 handle 33: sfq perturb 10 #https://speed.hetzner.de/1GB.bin iptables -t mangle -A PREROUTING -s 88.198.248.254 -j MARK --set-mark 2 iptables -t mangle -A PREROUTING -j CONNMARK --save-mark # Forward all ingress traffic on internet interface to the IFB device tc qdisc add dev $EXTDEV ingress handle ffff: tc filter add dev $EXTDEV parent ffff: protocol ip \ u32 match u32 0 0 \ action connmark \ action mirred egress redirect dev ifb0 \ flowid ffff:1 # Kein markieren mehr der Pakete / iptables fällt weg über ipset # root@mrWhiteGhost:/home/urnilxfgbez/Desktop# ipset create slowdown hash:ip #root@mrWhiteGhost:/home/urnilxfgbez/Desktop# tc filter add dev ifb0 parent 3:0 protocol ip basic match 'ipset(slowdown src,dst)' flowid 3:33 # # # # #root@mrWhiteGhost:/tmp# tc -s class show dev ifb0 #class htb 3:33 root prio 0 rate 10Mbit ceil 10Mbit burst 1600b cburst 1600b # Sent 28375626 bytes 20582 pkt (dropped 0, overlimits 20488 requeues 0) # backlog 0b 0p requeues 0 # lended: 20582 borrowed: 0 giants: 0 # tokens: -16889 ctokens: -16889 # #class htb 3:30 root prio 0 rate 60Mbit ceil 60Mbit burst 1590b cburst 1590b # Sent 1760229 bytes 3364 pkt (dropped 0, overlimits 884 requeues 0) # backlog 0b 0p requeues 0 # lended: 3364 borrowed: 0 giants: 0 # tokens: 3125 ctokens: 3125 exit 0 ====== GeoIP - iptables matches ====== * Getestet mit Debian Buster - **Achtung** hier gibt es keine xtables-addons* Pakete mehr / Sukzessive Wechsel zu **nftables** wird spürbar(er) * Dafür gibt es die Pakete in Debian Bullseye wieder / Die Pakete für bullseye scheinen auch unter Debian Buster zu laufen (**xtables-addons-common_3.13-1_amd64.deb/xtables-addons-dkms_3.13-1_all.deb** ) FIXME testen,testen,testen * Grundsätzliches: **iptables -m geoip --help** iptables -m geoip --help iptables v1.8.2 Usage: iptables -[ACD] chain rule-specification [options] iptables -I chain [rulenum] rule-specification [options] iptables -R chain rulenum rule-specification [options] iptables -D chain rulenum [options] iptables -[LS] [chain [rulenum]] [options] iptables -[FZ] [chain] [options] iptables -[NX] chain iptables -E old-chain-name new-chain-name iptables -P chain target [options] iptables -h (print this help information) Commands: Either long or short options are allowed. --append -A chain Append to chain --check -C chain Check for the existence of a rule --delete -D chain Delete matching rule from chain --delete -D chain rulenum Delete rule rulenum (1 = first) from chain --insert -I chain [rulenum] Insert in chain as rulenum (default 1=first) --replace -R chain rulenum Replace rule rulenum (1 = first) in chain --list -L [chain [rulenum]] List the rules in a chain or all chains --list-rules -S [chain [rulenum]] Print the rules in a chain or all chains --flush -F [chain] Delete all rules in chain or all chains --zero -Z [chain [rulenum]] Zero counters in chain or all chains --new -N chain Create a new user-defined chain --delete-chain -X [chain] Delete a user-defined chain --policy -P chain target Change policy on chain to target --rename-chain -E old-chain new-chain Change chain name, (moving any references) Options: --ipv4 -4 Nothing (line is ignored by ip6tables-restore) --ipv6 -6 Error (line is ignored by iptables-restore) [!] --proto -p proto protocol: by number or name, eg. `tcp' [!] --source -s address[/mask][...] source specification [!] --destination -d address[/mask][...] destination specification [!] --in-interface -i input name[+] network interface name ([+] for wildcard) --jump -j target target for rule (may load target extension) --goto -g chain jump to chain with no return --match -m match extended match (may load extension) --numeric -n numeric output of addresses and ports [!] --out-interface -o output name[+] network interface name ([+] for wildcard) --table -t table table to manipulate (default: `filter') --verbose -v verbose mode --wait -w [seconds] maximum wait to acquire xtables lock before give up --wait-interval -W [usecs] wait time to try to acquire xtables lock default is 1 second --line-numbers print line numbers when listing --exact -x expand numbers (display exact values) [!] --fragment -f match second or further fragments only --modprobe= try to insert modules using this command --set-counters PKTS BYTES set the counter during insert/append [!] --version -V print package version. geoip match options: [!] --src-cc, --source-country country[,country...] Match packet coming from (one of) the specified country(ies) [!] --dst-cc, --destination-country country[,country...] Match packet going to (one of) the specified country(ies) NOTE: The country is inputed by its ISO3166 code * Datenbank aktualisieren 1x im Monat **update-geoip.sh** #!/bin/bash DST_TEMP_DB="/tmp/dbip-country-lite.csv.gz" SRC_URL="https://download.db-ip.com/free/dbip-country-lite-$(date +%Y)-$(date +%m).csv.gz" #Required on Ubuntu 18.04: libtext-csv-xs-perl, libnet-cidr-lite-perl / took xt_geoip_build from ubuntu 20.04 XTABLES_BUILD_SCRIPT="/usr/lib/xtables-addons/xt_geoip_build" XTABLES_GEOIP_DIRECTORY="/usr/share/xt_geoip" function bailout { >&2 echo -e "$1" exit 2 } [[ -f $DST_TEMP_DB ]] && bailout "FAIL: $DST_TEMP_DB already found aborting" wget -q "$SRC_URL" -O $DST_TEMP_DB || bailout "FAIL: $DST_TEMP_DB cannot be downloaded from $SRC_URL" gunzip -t $DST_TEMP_DB || bailout "FAIL: Gzip Format failure from $SRC_URL" [[ -d "$XTABLES_GEOIP_DIRECTORY" ]] || echo "FAIL: could not find Destination: $XTABLES_GEOIP_DIRECTORY" gunzip -f $DST_TEMP_DB --to-stdout > $XTABLES_GEOIP_DIRECTORY/dbip-country-lite.csv || bailout "FAIL: cannot gunzip file from $SRC_URL" [[ -x $XTABLES_BUILD_SCRIPT ]] || echo "FAIL: could not find $XTABLES_BUILD_SCRIPT" $XTABLES_BUILD_SCRIPT -D "$XTABLES_GEOIP_DIRECTORY" -S "$XTABLES_GEOIP_DIRECTORY" rm $DST_TEMP_DB exit 0 * **Achtung** **/usr/lib/xtables-addons/xt_geoip_build** stammt aus dem Ubuntu 20.04 Paket von **xtables-addons-common_3.8-2_amd64.deb** * Nach 20 Minuten Tests mit iptables matches gabs noch keine panic :) 19 976 LOG all -- * * 0.0.0.0/0 0.0.0.0/0 -m geoip --source-country CN,RS LOG flags 0 level 4 ====== GeoIP - map-geoip.sh ====== * GeoIP Lookup aus vorhandenen Logfiles / kann auch gepiped werden um vorher relevante Auszüge rauszugreppen * **map-geoip.sh** #!/bin/bash # cmd: foo=$(mmdblookup -f /usr/local/share/ip-db/dbip-country-lite.mmdb -i 192.168.0.1 country iso_code 2>/dev/null) # https://download.db-ip.com/free/dbip-country-lite-2022-03.mmdb.gz PATH_LOGS="/var/log/fw.log.1" PATH_GEODB="/usr/local/share/ip-db/dbip-country-lite.mmdb" function bailout { echo -e "$1" >&2 echo -e "\nUsage: $0 [LOGFILE_FIREWALLS]" exit 2 } function lookup_geo { mmdblookup -f $PATH_GEODB -i $1 country iso_code 2>/dev/null | grep -o -P "\"[a-zA-Z]{2}\"" | tr -d "\"" } function lookup_ip { echo $1 | grep -o -P "$2(([0-9]{1,3}\.)){3}[0-9]{1,3}" } [[ -r $PATH_GEODB ]] || bailout "Cannot read geodb database: $PATH_GEODB" [[ -r "$1" ]] && PATH_LOGS="$1" [[ $1 == "-" ]] && PATH_LOGS="-" [[ -r $PATH_LOGS || $PATH_LOGS == "-" ]] || bailout "Cannot read path logs: $PATH_LOGS" which mmdblookup >/dev/null || bailout "Cannot find mmdblookup please install\n" IFS=$'\n' while read foo ; do LOG_SUFFIX="" SRC_IP="" DST_IP="" SRC_IP=$(lookup_ip $foo "SRC=" |tr -d "SRC=") DST_IP=$(lookup_ip $foo "DST=" | tr -d "DST=" ) #echo "SRC: $SRC_IP" #echo "DST: $DST_IP" if [ ${#SRC_IP} -gt 0 ] && [ ${#DST_IP} -gt 0 ] then SRC_GEO=$(lookup_geo $SRC_IP) DST_GEO=$(lookup_geo $DST_IP) [[ -z $SRC_GEO ]] && SRC_GEO="00" [[ -z $DST_GEO ]] && DST_GEO="00" LOG_SUFFIX="SRC_GEO=$SRC_GEO DST_GEO=$DST_GEO" echo "$foo$LOG_SUFFIX" fi done < <(zcat -f $PATH_LOGS ) ====== WEB Module ====== ===== Blocks - Multi - IPSET ===== * In Kombination mit dnsmasq und seiner Funktionalität ipsets aktualisieren zu können * www-data muss dnsmasq neu starten können zB: visudo -> www-data ALL=(ALL)NOPASSWD:/usr/sbin/service dnsmasq restart / und die entsprechenden Berechtigungen für das Set File besitzen unter /etc/dnsmasq.d/ipset-foo.conf * **Achtung:** Wenn es eine Vielzahl an Sets gibt die mit dnsmasq befüllt werden sollen muss auf die dnsmasq Syntax geachtet werden **ipset=/hostname/set1/set2/set3** und nicht jeweils eine extra Datei für set1, set2, set3 * **merge-ipsets.sh** #!/bin/bash function bailout { echo -e "$1" >&2 exit 2 } which dnsmasq >/dev/null || bailout "Cannot find dnsmasq binary" LOCATION_DNSMASQS="/etc/dnsmasq.conf /etc/dnsmasq.d/*" TMP_LOCATION=$(mktemp) FINAL_LOCATION="/etc/dnsmasq.d/ipset-master.conf" if [ ! -w $FINAL_LOCATION ] then rm $TMP_LOCATION bailout "FAIL: Final config file: $FINAL_LOCATION cannot be written to " fi grep -h "^ipset=" $LOCATION_DNSMASQS | cut -d"/" -f"2" | sort | uniq -c | while read hosts ; do nr_matches=$(echo $hosts | awk '{print $1}') host_entry=$(echo $hosts | awk '{print $2}') if (($nr_matches > 1 )) && [ -n $host_entry ] ; then build_entry="ipset=/$host_entry" while read found_sets do build_entry+="/$found_sets" done <<< $(grep -h "^ipset=/$host_entry/" $LOCATION_DNSMASQS | cut -d"/" -f 3- | tr "/" "\n" | sort | uniq ) echo $build_entry >> $TMP_LOCATION echo $build_entry fi done filesize_tmp=$(stat -c %s $TMP_LOCATION) if [ $filesize_tmp == "0" ] then rm $TMP_LOCATION echo "No double ipsets found in $LOCATION_DNSMASQS" exit 0 fi cmp -s $TMP_LOCATION $FINAL_LOCATION compare_ret="$?" if [ $compare_ret == "0" ] then rm $TMP_LOCATION echo "Current ipsets have already been merged" exit 0 fi dnsmasq --test --conf-file=$TMP_LOCATION ipset_tests="$?" if [ $ipset_tests != "0" ] then rm $TMP_LOCATION bailout "FAIL: Malformed config file: $TMP_LOCATION" fi #2022-02-21 cc: Keep Ownership intact cat $TMP_LOCATION > $FINAL_LOCATION rm $TMP_LOCATION systemctl reload dnsmasq || bailout "FAIL: Cannot reload dnsmasq" exit 0 * {{ :know-how:ipset-master.zip |}} ===== Blocks - IPSET ===== * In Kombination mit dnsmasq und seiner Funktionalität ipsets aktualisieren zu können * www-data muss dnsmasq neu starten können zB: visudo -> www-data ALL=(ALL)NOPASSWD:/usr/sbin/service dnsmasq restart / und die entsprechenden Berechtigungen für das Set File besitzen unter /etc/dnsmasq.d/ipset-foo.conf * {{ :know-how:blocked-ipset.zip |}} ===== Blocks - Hostnamen ===== * In Kombination mit dnsmasq / um quasi "dns Spoofing" zu betreiben d.h. das Resolving zu überschreiben für bestimmte Hostnamen * www-data muss dnsmasq neu starten können zB: visudo -> www-data ALL=(ALL)NOPASSWD:/usr/sbin/service dnsmasq restart * {{ :know-how:blocked-addresses.zip |}} ===== Proxy ===== * Um squid proxy ACLs zu bearbeiten * Achtung www-data braucht sudo Rechte für parse / reload * zB: visudo -> www-data ALL=(ALL)NOPASSWD:/usr/sbin/squid3 -k reconfigure, /usr/sbin/squid3 -k parse * {{ :know-how:proxy.zip |}} ===== Authorizer ===== * Um nach erfolgter Authentifizierung IP/MACs in ipset einzutragen * {{ :know-how:authorizer.tar.gz |}}