Use functions from lsb to display messages
This commit is contained in:
Frédéric Péters
parent
584c4b8aa6
commit
3308d21135
41
firewall
41
firewall
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@ -10,6 +10,8 @@
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# Description: An iptables firewall
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### END INIT INFO
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. /lib/lsb/init-functions
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NAME="firewall"
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abort()
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@ -162,7 +164,6 @@ port_knocking()
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start()
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{
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echo "Starting: Firewall"
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test_config
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modprobe ip_conntrack
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clean
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@ -176,33 +177,33 @@ start()
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$IPTABLES -A INPUT -i lo -j ACCEPT
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$IPTABLES -A OUTPUT -o lo -j ACCEPT
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echo "+ Allow WAN outgoing traffic"
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log_progress_msg "Allow WAN outgoing traffic"
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$IPTABLES -A OUTPUT -o $WAN_INT -p all -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
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$IPTABLES -A INPUT -i $WAN_INT -p all -m state --state ESTABLISHED,RELATED -j ACCEPT
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critical_return
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if [ $LAN == 1 ]; then
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echo "+ Allow WAN outgoing traffic from lan"
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log_progress_msg "Allow WAN outgoing traffic from lan"
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$IPTABLES -A FORWARD -i $LAN_INT -o $WAN_INT -p all -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
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$IPTABLES -A FORWARD -i $WAN_INT -o $LAN_INT -p all -m state --state RELATED,ESTABLISHED -j ACCEPT
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echo "+ Allow local network"
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log_progress_msg "Allow local network"
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$IPTABLES -A OUTPUT -o $LAN_INT -p all -j ACCEPT
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$IPTABLES -A INPUT -i $LAN_INT -p all -j ACCEPT
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for ALLOW_INT in $ALLOW_INTS; do
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echo "+ Allow WAN outgoing traffic for interface $ALLOW_INT"
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log_progress_msg "Allow WAN outgoing traffic for interface $ALLOW_INT"
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$IPTABLES -A FORWARD -i $ALLOW_INT -o $WAN_INT -p all -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
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$IPTABLES -A FORWARD -i $WAN_INT -o $ALLOW_INT -p all -m state --state RELATED,ESTABLISHED -j ACCEPT
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echo "+ Allow local network"
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log_progress_msg "+ Allow local network"
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$IPTABLES -A OUTPUT -o $ALLOW_INT -p all -j ACCEPT
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$IPTABLES -A INPUT -i $ALLOW_INT -p all -j ACCEPT
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done
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fi
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## block spoofing
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echo "+ Block spoofing, scan port, Xmas Tree, null scanning, SYN/RST and SYN/FIN"
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log_progress_msg "Block spoofing, scan port, Xmas Tree, null scanning, SYN/RST and SYN/FIN"
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echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter
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## NMAP FIN/URG/PSH
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$IPTABLES -A INPUT -i $WAN_INT -p tcp --tcp-flags ALL FIN,URG,PSH -j LOG --log-prefix 'iptables: Port scan: ' --log-level 4
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@ -223,19 +224,19 @@ start()
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$IPTABLES -A INPUT -i $WAN_INT -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
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## stop sync flood
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echo "+ Block Syn flood"
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log_progress_msg "Block Syn flood"
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echo "1" >/proc/sys/net/ipv4/tcp_syncookies
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echo "1024" > /proc/sys/net/ipv4/tcp_max_syn_backlog
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if [ $PING == 1 ]; then
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echo "+ PING allowed"
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log_progress_msg "PING allowed"
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iptables -A INPUT -p icmp --icmp-type ping -j ACCEPT
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iptables -A OUTPUT -p icmp --icmp-type ping -j ACCEPT
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iptables -A FORWARD -p icmp --icmp-type ping -j ACCEPT
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fi
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if [ $FTP == 1 ]; then
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echo "+ FTP allowed"
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log_progress_msg "FTP allowed"
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modprobe ip_conntrack_ftp
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$IPTABLES -A INPUT -i $WAN_INT -d $IP -p tcp --dport ftp -m state --state NEW,ESTABLISHED -j ACCEPT
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$IPTABLES -A OUTPUT -o $WAN_INT -s $IP -p tcp --sport ftp -m state --state ESTABLISHED -j ACCEPT
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@ -276,7 +277,7 @@ start()
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## NAT
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if [ $NAT == 1 ]; then
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echo "+ Activate nat"
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log_progress_msg "Activate nat"
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for proto in ftp irc sip h323; do modprobe nf_nat_$proto; done
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$IPTABLES -t nat -A POSTROUTING -o $WAN_INT -s $LAN_NETWORK -j SNAT --to-source $IP
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fi
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@ -294,30 +295,35 @@ start()
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$IPTABLES -A INPUT -j LOGDROP
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$IPTABLES -A OUTPUT -j LOGDROP
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$IPTABLES -A FORWARD -j LOGDROP
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}
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stop()
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{
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echo "+ Firewall stoped"
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clean
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}
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case "$1" in
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start|restore)
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log_daemon_msg "Starting firewall"
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if [ -f /etc/network/iptables-save ]; then
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iptables-restore < /etc/network/iptables-save
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echo "Firewall: rules loaded"
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else
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abort "!! No iptables rules saved please use test and save script options"
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log_warning_msg "!! No iptables rules saved please use test and save script options"
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fi
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log_end_msg 0
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;;
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stop)
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log_daemon_msg "Stopping firewall"
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stop || exit 1
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log_end_msg 0
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;;
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test)
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echo "You have 30 seconds to test your new rules"
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log_daemon_msg "Starting new rules"
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start || exit 1
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log_end_msg 0
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echo "... Please test your rules"
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sleep 30
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echo "---- The test is finished ----"
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@ -331,12 +337,15 @@ case "$1" in
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echo "If you are happy with this new rules please use save option"
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;;
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save)
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log_daemon_msg "Starting and saving new rules"
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start || exit 1
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iptables-save > /etc/network/iptables-save
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log_end_msg 0
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;;
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*)
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N=/etc/init.d/$NAME
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abort "Usage: $N {start|restore|save|test|stop}" >&2
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N=/etc/init.d/$NAME
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echo "Usage: $N {start|restore|save|test|stop}"
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exit 2
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;;
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esac
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