eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
+eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`
if [ -f /var/ipfire/red/device ]; then
# This chain will log, then DROPs packets with certain bad combinations
# of flags might indicate a port-scan attempt (xmas, null, etc)
/sbin/iptables -N PSCAN
- /sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "TCP Scan? "
- /sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "UDP Scan? "
- /sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "ICMP Scan? "
- /sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "FRAG Scan? "
- /sbin/iptables -A PSCAN -j DROP
+ if [ "$DROPPORTSCAN" == "on" ]; then
+ /sbin/iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
+ /sbin/iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
+ /sbin/iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
+ /sbin/iptables -A PSCAN -f -m limit --limit 10/minute -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
+ fi
+ /sbin/iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
# New tcp packets without SYN set - could well be an obscure type of port scan
# that's not covered above, may just be a broken windows machine
/sbin/iptables -N NEWNOTSYN
- /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "NEW not SYN? "
- /sbin/iptables -A NEWNOTSYN -j DROP
+ if [ "$DROPNEWNOTSYN" == "on" ]; then
+ /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
+ fi
+ /sbin/iptables -A NEWNOTSYN -j DROP -m comment --comment "DROP_NEWNOTSYN"
# Chain to contain all the rules relating to bad TCP flags
/sbin/iptables -N BADTCP
+ #Don't check loopback
+ /sbin/iptables -A BADTCP -i lo -j RETURN
+
# Disallow packets frequently used by port-scanners
# nmap xmas
/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
# This rule enables a host on ORANGE network to connect to the outside
# (only if we have a red connection)
if [ "$IFACE" != "" ]; then
- /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p tcp -o $IFACE -j ACCEPT
- /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -p udp -o $IFACE -j ACCEPT
+ /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
fi
fi
/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
fi
- # Outgoing masquerading
+ # Outgoing masquerading (don't masqerade IPSEC (mark 50))
+ /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
fi
# original do nothing line
#/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit --limit 10/sec
# the correct one, but the negative '!' do nothing...
- #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -m limit ! --limit 10/sec -j DROP
+ #/sbin/iptables -A INPUT -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN ! -m limit --limit 10/sec -j DROP
# Fix for braindead ISP's
/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
# CUSTOM chains, can be used by the users themselves
/sbin/iptables -N CUSTOMINPUT
/sbin/iptables -A INPUT -j CUSTOMINPUT
+ /sbin/iptables -N GUARDIAN
+ /sbin/iptables -A INPUT -j GUARDIAN
+ /sbin/iptables -A FORWARD -j GUARDIAN
/sbin/iptables -N CUSTOMFORWARD
/sbin/iptables -A FORWARD -j CUSTOMFORWARD
/sbin/iptables -N CUSTOMOUTPUT
/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
/sbin/iptables -N OUTGOINGFW
+ /sbin/iptables -N OUTGOINGFWMAC
/sbin/iptables -A OUTPUT -j OUTGOINGFW
/sbin/iptables -t nat -N CUSTOMPREROUTING
/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
/sbin/iptables -t nat -N CUSTOMPOSTROUTING
/sbin/iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
+ # IPTV chains for IGMPPROXY
+ /sbin/iptables -N IPTVINPUT
+ /sbin/iptables -A INPUT -j IPTVINPUT
+ /sbin/iptables -N IPTVFORWARD
+ /sbin/iptables -A FORWARD -j IPTVFORWARD
+
# filtering from GUI
/sbin/iptables -N GUIINPUT
/sbin/iptables -A INPUT -j GUIINPUT
+ /sbin/iptables -A GUIINPUT -p icmp --icmp-type 8 -j ACCEPT
# Accept everything connected
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
- /sbin/iptables -N IPSECVIRTUAL
+ /sbin/iptables -N IPSECINPUT
+ /sbin/iptables -N IPSECFORWARD
+ /sbin/iptables -N IPSECOUTPUT
/sbin/iptables -N OPENSSLVIRTUAL
- /sbin/iptables -A INPUT -j IPSECVIRTUAL
- /sbin/iptables -A INPUT -j OPENSSLVIRTUAL
- /sbin/iptables -A FORWARD -j IPSECVIRTUAL
- /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL
-
+ /sbin/iptables -A INPUT -j IPSECINPUT
+ /sbin/iptables -A INPUT -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL INPUT"
+ /sbin/iptables -A FORWARD -j IPSECFORWARD
+ /sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD"
+ /sbin/iptables -A OUTPUT -j IPSECOUTPUT
+ /sbin/iptables -t nat -N IPSECNAT
+ /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
+
# Outgoing Firewall
- /sbin/iptables -A FORWARD -j OUTGOINGFW
+ /sbin/iptables -A FORWARD -j OUTGOINGFWMAC
# localhost and ethernet.
- /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
+ /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
- /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
+ /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
- /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT -p ! icmp
+ /sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp
/sbin/iptables -A FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT
# If a host on orange tries to initiate a connection to IPFire's red IP and
/sbin/iptables -N DHCPBLUEINPUT
/sbin/iptables -A INPUT -j DHCPBLUEINPUT
- # IPSec
- /sbin/iptables -N IPSECPHYSICAL
- /sbin/iptables -A INPUT -j IPSECPHYSICAL
-
# OPenSSL
/sbin/iptables -N OPENSSLPHYSICAL
/sbin/iptables -A INPUT -j OPENSSLPHYSICAL
# upnp chain for our upnp daemon
/sbin/iptables -t nat -N UPNPFW
/sbin/iptables -t nat -A PREROUTING -j UPNPFW
-
+ /sbin/iptables -A FORWARD -m state --state NEW -j UPNPFW
+ # This chain only contains dummy rules.
+ /sbin/iptables -N UPNPFW
# Custom mangle chain (for port fowarding)
/sbin/iptables -t mangle -N PORTFWMANGLE
fi
# last rule in input and forward chain is for logging.
- /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
- /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
+
+ if [ "$DROPINPUT" == "on" ]; then
+ /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
+ fi
+ /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
+ if [ "$DROPOUTPUT" == "on" ]; then
+ /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
+ fi
+ /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
;;
startovpn)
# run openvpn
/etc/sysconfig/firewall.local stop
fi
- /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "INPUT "
- /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "OUTPUT "
+ if [ "$DROPINPUT" == "on" ]; then
+ /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT "
+ fi
+ /sbin/iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
+ if [ "$DROPOUTPUT" == "on" ]; then
+ /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_OUTPUT "
+ fi
+ /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_OUTPUT"
;;
stopovpn)
# stop openvpn
;;
restart)
$0 stop
+ $0 stopovpn
$0 start
+ $0 startovpn
;;
*)
echo "Usage: $0 {start|stop|reload|restart}"
projects / ipfire-2.x.git / blobdiff