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https://github.com/vincentmli/bpfire.git
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Patch-O-Matic in den Kernel eingebaut.
(Einige Module fehlen noch...) Unattended Installer bearbeitet. Firewallscript hinzugefuegt. git-svn-id: http://svn.ipfire.org/svn/ipfire/trunk@360 ea5c0bd1-69bd-2848-81d8-4f18e57aeed8
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295
src/initscripts/init.d/firewall
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295
src/initscripts/init.d/firewall
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#!/bin/sh
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eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
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eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
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IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`
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if [ -f /var/ipfire/red/device ]; then
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DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
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fi
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iptables_init() {
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# Flush all rules and delete all custom chains
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/sbin/iptables -F
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/sbin/iptables -t nat -F
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/sbin/iptables -t mangle -F
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/sbin/iptables -X
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/sbin/iptables -t nat -X
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/sbin/iptables -t mangle -X
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# Set up policies
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/sbin/iptables -P INPUT DROP
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/sbin/iptables -P FORWARD DROP
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/sbin/iptables -P OUTPUT ACCEPT
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# Empty LOG_DROP and LOG_REJECT chains
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/sbin/iptables -N LOG_DROP
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/sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
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/sbin/iptables -A LOG_DROP -j DROP
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/sbin/iptables -N LOG_REJECT
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/sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
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/sbin/iptables -A LOG_REJECT -j REJECT
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# This chain will log, then DROPs packets with certain bad combinations
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# of flags might indicate a port-scan attempt (xmas, null, etc)
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/sbin/iptables -N PSCAN
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/sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "TCP Scan? "
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/sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "UDP Scan? "
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/sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "ICMP Scan? "
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/sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "FRAG Scan? "
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/sbin/iptables -A PSCAN -j DROP
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# New tcp packets without SYN set - could well be an obscure type of port scan
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# that's not covered above, may just be a broken windows machine
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/sbin/iptables -N NEWNOTSYN
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/sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "NEW not SYN? "
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/sbin/iptables -A NEWNOTSYN -j DROP
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# Chain to contain all the rules relating to bad TCP flags
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/sbin/iptables -N BADTCP
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# Disallow packets frequently used by port-scanners
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# nmap xmas
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/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
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# Null
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/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
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# FIN
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/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
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# SYN/RST (also catches xmas variants that set SYN+RST+...)
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/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
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# SYN/FIN (QueSO or nmap OS probe)
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/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
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# NEW TCP without SYN
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/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN
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/sbin/iptables -A INPUT -j BADTCP
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/sbin/iptables -A FORWARD -j BADTCP
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}
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iptables_red() {
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/sbin/iptables -F REDINPUT
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/sbin/iptables -F REDFORWARD
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/sbin/iptables -t nat -F REDNAT
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# PPPoE / PPTP Device
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if [ "$IFACE" != "" ]; then
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# PPPoE / PPTP
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if [ "$DEVICE" != "" ]; then
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/sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
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fi
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if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
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if [ "$RED_DEV" != "" ]; then
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/sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
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fi
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fi
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fi
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# PPTP over DHCP
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if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
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/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
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/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
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fi
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# Orange pinholes
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if [ "$ORANGE_DEV" != "" ]; then
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# This rule enables a host on ORANGE network to connect to the outside
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# (only if we have a red connection)
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if [ "$IFACE" != "" ]; then
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/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p tcp -o $IFACE -j ACCEPT
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/sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p udp -o $IFACE -j ACCEPT
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fi
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fi
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if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
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# DHCP
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if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
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/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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fi
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if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
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/sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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fi
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# Outgoing masquerading
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/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
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fi
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}
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# See how we were called.
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case "$1" in
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start)
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iptables_init
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# Limit Packets- helps reduce dos/syn attacks
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# original do nothing line
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#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
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# the correct one, but the negative '!' do nothing...
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#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP
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# Fix for braindead ISP's
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/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
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# CUSTOM chains, can be used by the users themselves
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/sbin/iptables -N CUSTOMINPUT
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/sbin/iptables -A INPUT -j CUSTOMINPUT
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/sbin/iptables -N CUSTOMFORWARD
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/sbin/iptables -A FORWARD -j CUSTOMFORWARD
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/sbin/iptables -N CUSTOMOUTPUT
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/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
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/sbin/iptables -t nat -N CUSTOMPREROUTING
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/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
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/sbin/iptables -t nat -N CUSTOMPOSTROUTING
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/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
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# filtering from GUI
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/sbin/iptables -N GUIINPUT
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/sbin/iptables -A INPUT -j GUIINPUT
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# Accept everything connected
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/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
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/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
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# localhost and ethernet.
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/sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
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/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
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/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
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/sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
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/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
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/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
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/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT -p ! icmp
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/sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT
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# If a host on orange tries to initiate a connection to IPFire's red IP and
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# the connection gets DNATed back through a port forward to a server on orange
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# we end up with orange -> orange traffic passing through IPFire
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[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT
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# accept all traffic from ipsec interfaces
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/sbin/iptables -A INPUT -i ipsec+ -j ACCEPT
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/sbin/iptables -A FORWARD -i ipsec+ -j ACCEPT
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# allow DHCP on BLUE to be turned on/off
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/sbin/iptables -N DHCPBLUEINPUT
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/sbin/iptables -A INPUT -j DHCPBLUEINPUT
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# IPSec chains
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/sbin/iptables -N IPSECRED
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/sbin/iptables -A INPUT -j IPSECRED
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/sbin/iptables -N IPSECBLUE
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/sbin/iptables -A INPUT -j IPSECBLUE
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# WIRELESS chains
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/sbin/iptables -N WIRELESSINPUT
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/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
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/sbin/iptables -N WIRELESSFORWARD
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/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD
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# RED chain, used for the red interface
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/sbin/iptables -N REDINPUT
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/sbin/iptables -A INPUT -j REDINPUT
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/sbin/iptables -N REDFORWARD
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/sbin/iptables -A FORWARD -j REDFORWARD
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/sbin/iptables -t nat -N REDNAT
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/sbin/iptables -t nat -A POSTROUTING -j REDNAT
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iptables_red
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# DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
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# ORANGE to talk to GREEN / BLUE.
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/sbin/iptables -N DMZHOLES
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if [ "$ORANGE_DEV" != "" ]; then
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/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
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fi
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# XTACCESS chain, used for external access
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/sbin/iptables -N XTACCESS
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/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS
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# PORTFWACCESS chain, used for portforwarding
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/sbin/iptables -N PORTFWACCESS
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/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS
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# Custom prerouting chains (for transparent proxy and port forwarding)
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/sbin/iptables -t nat -N SQUID
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/sbin/iptables -t nat -A PREROUTING -j SQUID
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/sbin/iptables -t nat -N PORTFW
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/sbin/iptables -t nat -A PREROUTING -j PORTFW
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# Custom mangle chain (for port fowarding)
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/sbin/iptables -t mangle -N PORTFWMANGLE
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/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE
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# Postrouting rules (for port forwarding)
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/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
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--to-source $GREEN_ADDRESS
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if [ "$BLUE_DEV" != "" ]; then
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/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
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fi
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if [ "$ORANGE_DEV" != "" ]; then
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/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
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fi
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# run openvpn
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/usr/local/bin/openvpnctrl --create-chains-and-rules
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# run local firewall configuration, if present
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if [ -x /etc/sysconfig/firewall.local ]; then
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/etc/sysconfig/firewall.local start
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fi
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# last rule in input and forward chain is for logging.
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/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
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/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
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;;
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stop)
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iptables_init
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# Accept everyting connected
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/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
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# localhost and ethernet.
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/sbin/iptables -A INPUT -i lo -j ACCEPT
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/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT
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if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
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/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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fi
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if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
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/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
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fi
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# stop openvpn
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/usr/local/bin/openvpnctrl --delete-chains-and-rules
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# run local firewall configuration, if present
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if [ -x /etc/sysconfig/firewall.local ]; then
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/etc/sysconfig/firewall.local stop
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fi
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/sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
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/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
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;;
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reload)
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iptables_red
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# run local firewall configuration, if present
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if [ -x /etc/sysconfig/firewall.local ]; then
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/etc/sysconfig/firewall.local reload
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fi
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;;
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restart)
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$0 stop
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$0 start
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;;
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*)
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echo "Usage: $0 {start|stop|reload|restart}"
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exit 1
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;;
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esac
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exit 0
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@@ -82,7 +82,7 @@ case "${1}" in
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fi
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boot_mesg "Setting up IPFire firewall rules"
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/etc/rc.d/rc.firewall start
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/etc/rc.d/init.d/firewall start
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evaluate_retval
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boot_mesg "Setting up IP Accounting"
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/etc/rc.d/helper/writeipac.pl
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Reference in New Issue
Block a user