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#222426 (24.09.2021 11:04)
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#222436 (24.09.2021 11:18).
| 1 | 1 | #!/bin/bash |
| 2 | ||
| 2 | FW="/sbin/iptables" | |
| 3 | 3 | #INET_IFACE="eth0" # здесь имя инетовского интерфейса |
| 4 | 4 | LAN_IP="10.0.0.10" |
| 5 | 5 | LAN_IP_RANGE="10.0.0.0/24" |
| 6 | 6 | LAN_IFACE="eth1" # интерефейс локальной сети |
| 7 | LO_IFACE="lo" | |
| 8 | LO_IP="127.0.0.1" | |
| 9 | ||
| 10 | # Очистка всех цепочек iptables | |
| 11 | iptables -F | |
| 12 | iptables -X | |
| 13 | iptables -Z | |
| 14 | # Политики для трафика, не соответствующего ни одному правилу | |
| 15 | iptables -P INPUT DROP | |
| 16 | iptables -P FORWARD DROP | |
| 17 | iptables -P OUTPUT ACCEPT | |
| 18 | # Разрешаем Ping | |
| 19 | iptables -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT | |
| 20 | iptables -A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT | |
| 21 | iptables -A INPUT -p icmp --icmp-type time-exceeded -j ACCEPT | |
| 22 | iptables -A INPUT -p icmp --icmp-type echo-request -j ACCEPT | |
| 23 | # Прочие настройки | |
| 24 | iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT | |
| 25 | iptables -A INPUT -i lo -j ACCEPT | |
| 26 | iptables -A INPUT -p icmp --icmp-type 3 -j ACCEPT | |
| 27 | iptables -A INPUT -p icmp --icmp-type 11 -j ACCEPT | |
| 28 | iptables -A INPUT -p icmp --icmp-type 12 -j ACCEPT | |
| 29 | iptables -A INPUT -p tcp --syn --dport 113 -j REJECT --reject-with tcp-reset | |
| 30 | # Доступ по ssh | |
| 31 | iptables -A INPUT -p TCP --dport 22 -j ACCEPT | |
| 32 | # dhcp | |
| 33 | iptables -I INPUT -i $LAN_IFACE -p udp --dport 67:68 --sport 67:68 -j ACCEPT | |
| 34 | iptables -A INPUT -s $LAN_IP_RANGE -p udp -m udp --dport 67 -j ACCEPT | |
| 35 | # Доступ dns | |
| 36 | iptables -A INPUT -p udp --dport 53 -j ACCEPT | |
| 37 | iptables -A INPUT -p tcp --dport 53 -j ACCEPT | |
| 38 | # Доступ tftp | |
| 39 | iptables -A INPUT -p udp --dport tftp -j ACCEPT | |
| 40 | iptables -A INPUT -p tcp --dport tftp -j ACCEPT | |
| 41 | # Доступ к webserver по http и https | |
| 42 | iptables -A INPUT -p TCP --dport 80 -j ACCEPT | |
| 43 | iptables -A INPUT -p TCP --dport 443 -j ACCEPT | |
| 44 | #Сохраняем правила | |
| 45 | # Calculate/Gentoo хранит в /var/lib/iptables/rules-save | |
| 7 | BROADCAST_NET="0.0.0.0/32" | |
| 8 | LO_IFACE="lo" | |
| 9 | LO_IP="127.0.0.1" | |
| 10 | ||
| 11 | # Очистка всех цепочек iptables | |
| 12 | ${FW} -F
| |
| 13 | ${FW} -X
| |
| 14 | ${FW} -Z
| |
| 15 | # Политики для трафика, не соответствующего ни одному правилу | |
| 16 | ${FW} -P INPUT DROP
| |
| 17 | ${FW} -P FORWARD DROP
| |
| 18 | ${FW} -P OUTPUT ACCEPT
| |
| 19 | # Разрешаем Ping | |
| 20 | ${FW} -A INPUT -p icmp --icmp-type echo-reply -j ACCEPT
| |
| 21 | ${FW} -A INPUT -p icmp --icmp-type destination-unreachable -j ACCEPT
| |
| 22 | ${FW} -A INPUT -p icmp --icmp-type time-exceeded -j ACCEPT
| |
| 23 | ${FW} -A INPUT -p icmp --icmp-type echo-request -j ACCEPT
| |
| 24 | # Прочие настройки | |
| 25 | ${FW} -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
| |
| 26 | ${FW} -A INPUT -i lo -j ACCEPT
| |
| 27 | ${FW} -A INPUT -p icmp --icmp-type 3 -j ACCEPT
| |
| 28 | ${FW} -A INPUT -p icmp --icmp-type 11 -j ACCEPT
| |
| 29 | ${FW} -A INPUT -p icmp --icmp-type 12 -j ACCEPT
| |
| 30 | ${FW} -A INPUT -p tcp --syn --dport 113 -j REJECT --reject-with tcp-reset
| |
| 31 | # Доступ по ssh | |
| 32 | ${FW} -A INPUT -p TCP --dport 22 -j ACCEPT
| |
| 33 | # dhcp | |
| 34 | ${FW} -A INPUT -s ${BROADCAST_NET} -p udp -m udp --dport 67 -j ACCEPT
| |
| 35 | ${FW} -A INPUT -s ${LAN_IP_RANGE} -p udp -m udp --dport 67 -j ACCEPT
| |
| 36 | # Доступ dns | |
| 37 | ${FW} -A INPUT -p udp --dport 53 -j ACCEPT
| |
| 38 | ${FW} -A INPUT -p tcp --dport 53 -j ACCEPT
| |
| 39 | # Доступ tftp | |
| 40 | ${FW} -A INPUT -p udp --dport tftp -j ACCEPT
| |
| 41 | ${FW} -A INPUT -p tcp --dport tftp -j ACCEPT
| |
| 42 | # Доступ к webserver по http и https | |
| 43 | ${FW} -A INPUT -p TCP --dport 80 -j ACCEPT
| |
| 44 | ${FW} -A INPUT -p TCP --dport 443 -j ACCEPT
| |
| 45 | #Сохраняем правила | |
| 46 | # Calculate/Gentoo хранит в /var/lib/iptables/rules-save |