334 lines
11 KiB
Bash
334 lines
11 KiB
Bash
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#!/bin/bash
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SYSCTL="/sbin/sysctl -w"
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IPT="/sbin/iptables"
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IPTS="/sbin/iptables-save"
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IPTR="/sbin/iptables-restore"
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# Internet Interface
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INET_IFACE="eth1"
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INET_IP="1.2.3.4"
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INET_ADMIN="2.3.4.5"
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VPN_IFACE="tun+"
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VPN_IP="10.8.0.1"
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VPN_NET="10.8.0.0/8"
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VPN_BCAST="10.255.255.255"
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# Local Interface Information
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LOCAL_IFACE="eth0"
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LOCAL_IP="192.168.5.1"
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LOCAL_NET="192.168.5.0/24"
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LOCAL_BCAST="192.168.5.255"
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EVOIP_IFACE="vlan1234"
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EVOIP_IP="10.20.5.50"
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EVOIP_NET="10.20.5.48/29"
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EVOIP_BCAST="10.20.5.55"
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VIDEO_IFACE="vlan1015"
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VIDEO_IP="192.168.15.1"
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VIDEO_NET="192.168.15.0/24"
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VIDEO_BCAST="192.168.15.255"
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VOIP_IFACE="vlan1016"
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VOIP_IP="192.168.16.1"
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VOIP_NET="192.168.16.0/24"
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VOIP_BCAST="192.168.16.255"
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WIFI_IFACE="vlan1017"
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WIFI_IP="192.168.17.1"
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WIFI_NET="192.168.17.0/24"
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WIFI_BCAST="192.168.17.255"
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# Localhost Interface
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LO_IFACE="lo"
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LO_IP="127.0.0.1"
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# Save and Restore arguments handled here
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if [ "$1" = "save" ]
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then
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echo -n "Saving firewall to /etc/sysconfig/iptables ... "
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$IPTS > /etc/scripts/iptables
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echo "done"
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exit 0
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elif [ "$1" = "restore" ]
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then
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echo -n "Restoring firewall from /etc/sysconfig/iptables ... "
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$IPTR < /etc/scripts/iptables
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echo "done"
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exit 0
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fi
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echo "Loading kernel modules ..."
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/sbin/modprobe ip_tables
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/sbin/modprobe ip_conntrack
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/sbin/modprobe iptable_filter
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/sbin/modprobe iptable_mangle
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/sbin/modprobe iptable_nat
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/sbin/modprobe ipt_LOG
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/sbin/modprobe ipt_limit
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/sbin/modprobe ipt_MASQUERADE
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#/sbin/modprobe ipt_owner
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#/sbin/modprobe ipt_REJECT
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#/sbin/modprobe ipt_mark
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#/sbin/modprobe ipt_tcpmss
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/sbin/modprobe multiport
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/sbin/modprobe ipt_state
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#/sbin/modprobe ipt_unclean
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/sbin/modprobe ip_nat_ftp
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/sbin/modprobe ip_conntrack_ftp
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#/sbin/modprobe ip_conntrack_irc
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/ip_forward
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else
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$SYSCTL net.ipv4.ip_forward="1"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/tcp_syncookies
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else
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$SYSCTL net.ipv4.tcp_syncookies="1"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/conf/all/rp_filter
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else
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$SYSCTL net.ipv4.conf.all.rp_filter="1"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
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else
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$SYSCTL net.ipv4.icmp_echo_ignore_broadcasts="1"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "0" > /proc/sys/net/ipv4/conf/all/accept_source_route
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else
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$SYSCTL net.ipv4.conf.all.accept_source_route="0"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/conf/all/secure_redirects
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else
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$SYSCTL net.ipv4.conf.all.secure_redirects="1"
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fi
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if [ "$SYSCTL" = "" ]
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then
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echo "1" > /proc/sys/net/ipv4/conf/all/log_martians
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else
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$SYSCTL net.ipv4.conf.all.log_martians="1"
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fi
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###############################################################################
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echo "Flushing Tables ..."
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# Reset Default Policies
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$IPT -P INPUT ACCEPT
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$IPT -P FORWARD ACCEPT
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$IPT -P OUTPUT ACCEPT
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$IPT -t nat -P PREROUTING ACCEPT
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$IPT -t nat -P POSTROUTING ACCEPT
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$IPT -t nat -P OUTPUT ACCEPT
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$IPT -t mangle -P PREROUTING ACCEPT
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$IPT -t mangle -P OUTPUT ACCEPT
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$IPT -F
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$IPT -t nat -F
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$IPT -t mangle -F
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$IPT -X
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$IPT -t nat -X
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$IPT -t mangle -X
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if [ "$1" = "stop" ]
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then
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echo "Firewall completely flushed! Now running with no firewall."
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exit 0
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fi
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$IPT -P INPUT DROP
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$IPT -P OUTPUT DROP
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$IPT -P FORWARD DROP
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###############################################################################
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#$IPT -N bad_packets
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#$IPT -N bad_tcp_packets
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$IPT -N icmp_packets
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$IPT -N udp_inbound
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$IPT -N udp_outbound
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$IPT -N tcp_inbound
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$IPT -N tcp_outbound
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#$IPT -A bad_packets -p ALL -i $INET_IFACE -s $LOCAL_NET -j LOG --log-prefix "fp=bad_packets:2 a=DROP "
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$IPT -A bad_packets -p ALL -i $INET_IFACE -s $LOCAL_NET -j DROP
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#$IPT -A bad_packets -p ALL -m state --state INVALID -j LOG --log-prefix "fp=bad_packets:1 a=DROP "
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$IPT -A bad_packets -p ALL -m state --state INVALID -j DROP
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$IPT -A bad_packets -p tcp -j bad_tcp_packets
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$IPT -A bad_packets -p ALL -j RETURN
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$IPT -A bad_tcp_packets -p tcp -i $LOCAL_IFACE -j RETURN
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#$IPT -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG --log-prefix "fp=bad_tcp_packets:1 a=DROP "
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$IPT -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL NONE -j LOG --log-prefix "fp=bad_tcp_packets:2 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL NONE -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL ALL -j LOG --log-prefix "fp=bad_tcp_packets:3 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL ALL -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL FIN,URG,PSH -j LOG --log-prefix "fp=bad_tcp_packets:4 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j LOG --log-prefix "fp=bad_tcp_packets:5 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags SYN,RST SYN,RST -j LOG --log-prefix "fp=bad_tcp_packets:6 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
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#$IPT -A bad_tcp_packets -p tcp --tcp-flags SYN,FIN SYN,FIN -j LOG --log-prefix "fp=bad_tcp_packets:7 a=DROP "
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$IPT -A bad_tcp_packets -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
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$IPT -A bad_tcp_packets -p tcp -j RETURN
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#$IPT -A icmp_packets --fragment -p ICMP -j LOG --log-prefix "fp=icmp_packets:1 a=DROP "
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$IPT -A icmp_packets --fragment -p ICMP -j DROP
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$IPT -A icmp_packets -p ICMP -s 0/0 --icmp-type 8 -j DROP
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$IPT -A icmp_packets -p ICMP -s 0/0 --icmp-type 11 -j ACCEPT
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$IPT -A icmp_packets -p ICMP -j RETURN
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#$IPT -A icmp_packets -p ICMP -j ACCEPT
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$IPT -A udp_inbound -p UDP -s 0/0 --destination-port 137 -j DROP
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$IPT -A udp_inbound -p UDP -s 0/0 --destination-port 138 -j DROP
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$IPT -A udp_inbound -p UDP -s 0/0 --source-port 67 --destination-port 68 -j ACCEPT
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$IPT -A udp_inbound -m state --state NEW -p UDP -s 0/0 --destination-port 1194 -j ACCEPT #vpn
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$IPT -A udp_inbound -p UDP -j RETURN
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$IPT -A tcp_inbound -p TCP -s $INET_ADMIN --destination-port 2222 -j ACCEPT #ssh
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$IPT -A tcp_inbound -p TCP -j RETURN
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$IPT -A udp_outbound -p UDP -s 0/0 -j ACCEPT
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$IPT -A tcp_outbound -p TCP -s 0/0 -j ACCEPT
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###############################################################################
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echo "Process INPUT chain ..."
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$IPT -A INPUT -p ALL -i $LO_IFACE -j ACCEPT
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#$IPT -A INPUT -p ALL -j bad_packets
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$IPT -A INPUT -p ALL -i $LOCAL_IFACE -s $LOCAL_NET -j ACCEPT
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$IPT -A INPUT -p ALL -i $LOCAL_IFACE -d $LOCAL_BCAST -j ACCEPT
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$IPT -A INPUT -p ALL -i $WIFI_IFACE -s $WIFI_NET -j ACCEPT
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$IPT -A INPUT -p ALL -i $WIFI_IFACE -d $WIFI_BCAST -j ACCEPT
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$IPT -A INPUT -p ALL -i $VIDEO_IFACE -s $VIDEO_NET -j ACCEPT
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$IPT -A INPUT -p ALL -i $VIDEO_IFACE -d $VIDEO_BCAST -j ACCEPT
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$IPT -A INPUT -p ALL -i $VOIP_IFACE -s $VOIP_NET -j ACCEPT
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$IPT -A INPUT -p ALL -i $VOIP_IFACE -d $VOIP_BCAST -j ACCEPT
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$IPT -A INPUT -p ALL -i $VPN_IFACE -j ACCEPT
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$IPT -A INPUT -p ALL -i $EVOIP_IFACE -j ACCEPT
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$IPT -A INPUT -p ALL -i $INET_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A INPUT -p TCP -i $INET_IFACE -j tcp_inbound
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$IPT -A INPUT -p UDP -i $INET_IFACE -j udp_inbound
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$IPT -A INPUT -p ICMP -i $INET_IFACE -j icmp_packets
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#$IPT -A INPUT -m pkttype --pkt-type broadcast -j DROP
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#$IPT -A INPUT -j LOG --log-prefix "fp=INPUT:99 a=DROP "
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###############################################################################
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echo "Process FORWARD chain ..."
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#$IPT -A FORWARD -p ALL -j bad_packets
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$IPT -A FORWARD -p tcp -i $LOCAL_IFACE -j tcp_outbound
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$IPT -A FORWARD -p udp -i $LOCAL_IFACE -j udp_outbound
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$IPT -A FORWARD -p ALL -i $LOCAL_IFACE -j ACCEPT
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#forward VIDEO vlan1015 to internet but not to the local network!
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###$IPT -A FORWARD -p ALL -i $VIDEO_IFACE -d $LOCAL_NET -j LOG --log-prefix "fp=FORWARD:99 a=DROP "
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###$IPT -A FORWARD -p ALL -i $VIDEO_IFACE -d $LOCAL_NET -j DROP
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$IPT -A FORWARD -p ALL -i $VIDEO_IFACE -d $LOCAL_NET -j ACCEPT
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$IPT -A FORWARD -p ALL -i $VIDEO_IFACE -s $VIDEO_NET -j ACCEPT
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#forward VOIP vlan1016 to internet but not to the local network!
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$IPT -A FORWARD -p ALL -i $VOIP_IFACE -d $LOCAL_NET -j LOG --log-prefix "fp=FORWARD:99 a=DROP "
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$IPT -A FORWARD -p ALL -i $VOIP_IFACE -d $LOCAL_NET -j DROP
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$IPT -A FORWARD -p ALL -i $VOIP_IFACE -s $VOIP_NET -j ACCEPT
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#forward WIFI vlan1017 to internet but not to the local network!
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d $LOCAL_NET -j LOG --log-prefix "fp=FORWARD:99 a=DROP "
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d $LOCAL_NET -j DROP
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#wifi to DVR allowed:
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d 192.168.15.2 -j ACCEPT
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d 192.168.15.1 -j ACCEPT
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d $VIDEO_NET -j DROP
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d $VOIP_NET -j LOG --log-prefix "fp=FORWARD:99 a=DROP "
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -d $VOIP_NET -j DROP
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$IPT -A FORWARD -p ALL -i $WIFI_IFACE -s $WIFI_NET -j ACCEPT
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#forward VPN
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$IPT -A FORWARD -p ALL -i $VPN_IFACE -s $VPN_NET -j ACCEPT
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#$IPT -A FORWARD -i $VPN_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A FORWARD -i $EVOIP_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A FORWARD -i $INET_IFACE -m state --state ESTABLISHED,RELATED -j ACCEPT
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$IPT -A FORWARD -j LOG --log-prefix "fp=FORWARD:99 a=DROP "
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###############################################################################
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echo "Process OUTPUT chain ..."
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$IPT -A OUTPUT -m state -p icmp --state INVALID -j DROP
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$IPT -A OUTPUT -p ALL -s $LO_IP -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $LO_IFACE -j ACCEPT
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$IPT -A OUTPUT -p ALL -s $LOCAL_IP -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $LOCAL_IFACE -j ACCEPT
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$IPT -A OUTPUT -p ALL -s $VIDEO_IP -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $VIDEO_IFACE -j ACCEPT
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$IPT -A OUTPUT -p ALL -s $WIFI_IP -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $WIFI_IFACE -j ACCEPT
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$IPT -A OUTPUT -p ALL -s $VOIP_IP -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $VOIP_IFACE -j ACCEPT
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$IPT -A OUTPUT -p ALL -o $VPN_IFACE -j ACCEPT
|
||
|
|
|
||
|
|
$IPT -A OUTPUT -p ALL -o $EVOIP_IFACE -j ACCEPT
|
||
|
|
$IPT -A OUTPUT -p ALL -o $INET_IFACE -j ACCEPT
|
||
|
|
$IPT -A OUTPUT -j LOG --log-prefix "fp=OUTPUT:99 a=DROP "
|
||
|
|
|
||
|
|
###############################################################################
|
||
|
|
echo "Load rules for nat table ..."
|
||
|
|
|
||
|
|
$IPT -t nat -A POSTROUTING -o $INET_IFACE -j MASQUERADE
|
||
|
|
$IPT -t nat -A POSTROUTING -o $EVOIP_IFACE -j MASQUERADE
|
||
|
|
$IPT -t nat -A POSTROUTING -s $VPN_NET -o $INET_IFACE -j MASQUERADE #vpn
|
||
|
|
|
||
|
|
###
|
||
|
|
echo "Loading extra rules ..."
|
||
|
|
|
||
|
|
#VOIP
|
||
|
|
$IPT -I FORWARD -p udp -i $EVOIP_IFACE -d 192.168.16.2 --dport 5060 -j ACCEPT
|
||
|
|
$IPT -t nat -I PREROUTING -p udp -i $EVOIP_IFACE --dport 5060 -j DNAT --to 192.168.16.2:5060
|
||
|
|
$IPT -I FORWARD -p udp -i $EVOIP_IFACE -d 192.168.16.2 --dport 10000:20000 -j ACCEPT
|
||
|
|
$IPT -t nat -I PREROUTING -p udp -i $EVOIP_IFACE --dport 10000:20000 -j DNAT --to 192.168.16.2:10000-20000
|
||
|
|
|
||
|
|
#NVR
|
||
|
|
$IPT -I FORWARD -p tcp -i $INET_IFACE -s 0/0 -d 192.168.15.251 --dport 8001 -j ACCEPT
|
||
|
|
$IPT -t nat -I PREROUTING -p tcp -i $INET_IFACE --dport 8001 -j DNAT --to 192.168.15.251:8001
|
||
|
|
$IPT -t nat -I PREROUTING -p tcp -i $WIFI_IFACE -s $WIFI_NET -d $INET_IP --dport 8001 -j DNAT --to 192.168.15.251:8001
|
||
|
|
$IPT -t nat -I POSTROUTING -p tcp -o $WIFI_IFACE -s $VIDEO_NET -d 192.168.15.251 --dport 8001 -j SNAT --to $INET_IP
|
||
|
|
#substream
|
||
|
|
$IPT -I FORWARD -p tcp -i $INET_IFACE -s 0/0 -d 192.168.15.251 --dport 554 -j ACCEPT
|
||
|
|
$IPT -t nat -I PREROUTING -p tcp -i $INET_IFACE --dport 554 -j DNAT --to 192.168.15.251:554
|
||
|
|
$IPT -t nat -I PREROUTING -p tcp -i $WIFI_IFACE -s $WIFI_NET -d $INET_IP --dport 554 -j DNAT --to 192.168.15.250:554
|
||
|
|
$IPT -t nat -I POSTROUTING -p tcp -o $WIFI_IFACE -s $VIDEO_NET -d 192.168.15.251 --dport 554 -j SNAT --to $INET_IP
|