mirror of
https://github.com/vincentmli/bpfire.git
synced 2026-04-23 09:22:59 +02:00
Merge remote-tracking branch 'amarx/firewall' into fifteen
This commit is contained in:
Michael Tremer
@@ -68,11 +68,171 @@ iptables_init() {
|
||||
# SYN/FIN (QueSO or nmap OS probe)
|
||||
/sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
|
||||
# NEW TCP without SYN
|
||||
/sbin/iptables -A BADTCP -p tcp ! --syn -m state --state NEW -j NEWNOTSYN
|
||||
/sbin/iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
|
||||
|
||||
/sbin/iptables -A INPUT -j BADTCP
|
||||
/sbin/iptables -A FORWARD -j BADTCP
|
||||
/sbin/iptables -A INPUT -p tcp -j BADTCP
|
||||
/sbin/iptables -A FORWARD -p tcp -j BADTCP
|
||||
|
||||
# Connection tracking chain
|
||||
/sbin/iptables -N CONNTRACK
|
||||
/sbin/iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
|
||||
|
||||
# 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 CUSTOMFORWARD
|
||||
/sbin/iptables -A FORWARD -j CUSTOMFORWARD
|
||||
/sbin/iptables -N CUSTOMOUTPUT
|
||||
/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
|
||||
/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
|
||||
|
||||
# Guardian (IPS) chains
|
||||
/sbin/iptables -N GUARDIAN
|
||||
/sbin/iptables -A INPUT -j GUARDIAN
|
||||
/sbin/iptables -A FORWARD -j GUARDIAN
|
||||
|
||||
# Block OpenVPN transfer networks
|
||||
/sbin/iptables -N OVPNBLOCK
|
||||
for i in INPUT FORWARD OUTPUT; do
|
||||
/sbin/iptables -A ${i} -j OVPNBLOCK
|
||||
done
|
||||
|
||||
# OpenVPN transfer network translation
|
||||
/sbin/iptables -t nat -N OVPNNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j OVPNNAT
|
||||
|
||||
# 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 on loopback
|
||||
/sbin/iptables -N LOOPBACK
|
||||
/sbin/iptables -A LOOPBACK -i lo -j ACCEPT
|
||||
/sbin/iptables -A LOOPBACK -o lo -j ACCEPT
|
||||
|
||||
# Filter all packets with loopback addresses on non-loopback interfaces.
|
||||
/sbin/iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
|
||||
/sbin/iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
|
||||
|
||||
for i in INPUT FORWARD OUTPUT; do
|
||||
/sbin/iptables -A ${i} -j LOOPBACK
|
||||
done
|
||||
|
||||
# Accept everything connected
|
||||
for i in INPUT FORWARD OUTPUT; do
|
||||
/sbin/iptables -A ${i} -j CONNTRACK
|
||||
done
|
||||
|
||||
# trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
|
||||
/sbin/iptables -N IPSECINPUT
|
||||
/sbin/iptables -N IPSECFORWARD
|
||||
/sbin/iptables -N IPSECOUTPUT
|
||||
/sbin/iptables -A INPUT -j IPSECINPUT
|
||||
/sbin/iptables -A FORWARD -j IPSECFORWARD
|
||||
/sbin/iptables -A OUTPUT -j IPSECOUTPUT
|
||||
/sbin/iptables -t nat -N IPSECNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
|
||||
|
||||
# localhost and ethernet.
|
||||
/sbin/iptables -A INPUT -i $GREEN_DEV -m conntrack --ctstate NEW -j ACCEPT ! -p icmp
|
||||
|
||||
# allow DHCP on BLUE to be turned on/off
|
||||
/sbin/iptables -N DHCPBLUEINPUT
|
||||
/sbin/iptables -A INPUT -j DHCPBLUEINPUT
|
||||
|
||||
# WIRELESS chains
|
||||
/sbin/iptables -N WIRELESSINPUT
|
||||
/sbin/iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
|
||||
/sbin/iptables -N WIRELESSFORWARD
|
||||
/sbin/iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
|
||||
|
||||
# TOR
|
||||
/sbin/iptables -N TOR_INPUT
|
||||
/sbin/iptables -A INPUT -j TOR_INPUT
|
||||
|
||||
# Jump into the actual firewall ruleset.
|
||||
/sbin/iptables -N INPUTFW
|
||||
/sbin/iptables -A INPUT -j INPUTFW
|
||||
|
||||
/sbin/iptables -N OUTGOINGFW
|
||||
/sbin/iptables -A OUTPUT -j OUTGOINGFW
|
||||
|
||||
/sbin/iptables -N FORWARDFW
|
||||
/sbin/iptables -A FORWARD -j FORWARDFW
|
||||
|
||||
# RED chain, used for the red interface
|
||||
/sbin/iptables -N REDINPUT
|
||||
/sbin/iptables -A INPUT -j REDINPUT
|
||||
/sbin/iptables -N REDFORWARD
|
||||
/sbin/iptables -A FORWARD -j REDFORWARD
|
||||
/sbin/iptables -t nat -N REDNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j REDNAT
|
||||
|
||||
iptables_red
|
||||
|
||||
# Custom prerouting chains (for transparent proxy)
|
||||
/sbin/iptables -t nat -N SQUID
|
||||
/sbin/iptables -t nat -A PREROUTING -j SQUID
|
||||
|
||||
# DNAT rules
|
||||
/sbin/iptables -t nat -N NAT_DESTINATION
|
||||
/sbin/iptables -t nat -A PREROUTING -j NAT_DESTINATION
|
||||
|
||||
# SNAT rules
|
||||
/sbin/iptables -t nat -N NAT_SOURCE
|
||||
/sbin/iptables -t nat -A POSTROUTING -j NAT_SOURCE
|
||||
|
||||
# upnp chain for our upnp daemon
|
||||
/sbin/iptables -t nat -N UPNPFW
|
||||
/sbin/iptables -t nat -A PREROUTING -j UPNPFW
|
||||
/sbin/iptables -N UPNPFW
|
||||
/sbin/iptables -A FORWARD -m conntrack --ctstate NEW -j UPNPFW
|
||||
|
||||
# run local firewall configuration, if present
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
/etc/sysconfig/firewall.local start
|
||||
fi
|
||||
|
||||
# run openvpn
|
||||
/usr/local/bin/openvpnctrl --create-chains-and-rules
|
||||
|
||||
# run wirelessctrl
|
||||
/usr/local/bin/wirelessctrl
|
||||
|
||||
#POLICY CHAIN
|
||||
/sbin/iptables -N POLICYIN
|
||||
/sbin/iptables -A INPUT -j POLICYIN
|
||||
/sbin/iptables -N POLICYFWD
|
||||
/sbin/iptables -A FORWARD -j POLICYFWD
|
||||
/sbin/iptables -N POLICYOUT
|
||||
/sbin/iptables -A OUTPUT -j POLICYOUT
|
||||
|
||||
/usr/sbin/firewall-policy
|
||||
|
||||
# read new firewall
|
||||
/usr/local/bin/forwardfwctrl
|
||||
|
||||
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 [ "$DROPFORWARD" == "on" ]; then
|
||||
/sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
|
||||
fi
|
||||
/sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD"
|
||||
}
|
||||
|
||||
iptables_red() {
|
||||
@@ -130,223 +290,23 @@ iptables_red() {
|
||||
case "$1" in
|
||||
start)
|
||||
iptables_init
|
||||
|
||||
# Limit Packets- helps reduce dos/syn attacks
|
||||
# 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
|
||||
|
||||
# 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 IPSECINPUT
|
||||
/sbin/iptables -N IPSECFORWARD
|
||||
/sbin/iptables -N IPSECOUTPUT
|
||||
/sbin/iptables -N 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 OVPNNAT
|
||||
/sbin/iptables -t nat -N IPSECNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j OVPNNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
|
||||
|
||||
# TOR
|
||||
/sbin/iptables -N TOR_INPUT
|
||||
/sbin/iptables -A INPUT -j TOR_INPUT
|
||||
|
||||
# Outgoing Firewall
|
||||
/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 -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 -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 FORWARD -i $GREEN_DEV -m state --state NEW -j ACCEPT
|
||||
|
||||
# If a host on orange tries to initiate a connection to IPFire's red IP and
|
||||
# the connection gets DNATed back through a port forward to a server on orange
|
||||
# we end up with orange -> orange traffic passing through IPFire
|
||||
[ "$ORANGE_DEV" != "" ] && /sbin/iptables -A FORWARD -i $ORANGE_DEV -o $ORANGE_DEV -m state --state NEW -j ACCEPT
|
||||
|
||||
# allow DHCP on BLUE to be turned on/off
|
||||
/sbin/iptables -N DHCPBLUEINPUT
|
||||
/sbin/iptables -A INPUT -j DHCPBLUEINPUT
|
||||
|
||||
# OPenSSL
|
||||
/sbin/iptables -N OPENSSLPHYSICAL
|
||||
/sbin/iptables -A INPUT -j OPENSSLPHYSICAL
|
||||
|
||||
# WIRELESS chains
|
||||
/sbin/iptables -N WIRELESSINPUT
|
||||
/sbin/iptables -A INPUT -m state --state NEW -j WIRELESSINPUT
|
||||
/sbin/iptables -N WIRELESSFORWARD
|
||||
/sbin/iptables -A FORWARD -m state --state NEW -j WIRELESSFORWARD
|
||||
|
||||
# RED chain, used for the red interface
|
||||
/sbin/iptables -N REDINPUT
|
||||
/sbin/iptables -A INPUT -j REDINPUT
|
||||
/sbin/iptables -N REDFORWARD
|
||||
/sbin/iptables -A FORWARD -j REDFORWARD
|
||||
/sbin/iptables -t nat -N REDNAT
|
||||
/sbin/iptables -t nat -A POSTROUTING -j REDNAT
|
||||
|
||||
iptables_red
|
||||
|
||||
# DMZ pinhole chain. setdmzholes setuid prog adds rules here to allow
|
||||
# ORANGE to talk to GREEN / BLUE.
|
||||
/sbin/iptables -N DMZHOLES
|
||||
if [ "$ORANGE_DEV" != "" ]; then
|
||||
/sbin/iptables -A FORWARD -i $ORANGE_DEV -m state --state NEW -j DMZHOLES
|
||||
fi
|
||||
|
||||
# XTACCESS chain, used for external access
|
||||
/sbin/iptables -N XTACCESS
|
||||
/sbin/iptables -A INPUT -m state --state NEW -j XTACCESS
|
||||
|
||||
# PORTFWACCESS chain, used for portforwarding
|
||||
/sbin/iptables -N PORTFWACCESS
|
||||
/sbin/iptables -A FORWARD -m state --state NEW -j PORTFWACCESS
|
||||
|
||||
# Custom prerouting chains (for transparent proxy and port forwarding)
|
||||
/sbin/iptables -t nat -N SQUID
|
||||
/sbin/iptables -t nat -A PREROUTING -j SQUID
|
||||
/sbin/iptables -t nat -N PORTFW
|
||||
/sbin/iptables -t nat -A PREROUTING -j PORTFW
|
||||
|
||||
# upnp chain for our upnp daemon
|
||||
/sbin/iptables -t nat -N UPNPFW
|
||||
/sbin/iptables -t nat -A PREROUTING -j UPNPFW
|
||||
/sbin/iptables -N UPNPFW
|
||||
/sbin/iptables -A FORWARD -m state --state NEW -j UPNPFW
|
||||
|
||||
# Custom mangle chain (for port fowarding)
|
||||
/sbin/iptables -t mangle -N PORTFWMANGLE
|
||||
/sbin/iptables -t mangle -A PREROUTING -j PORTFWMANGLE
|
||||
|
||||
# Postrouting rules (for port forwarding)
|
||||
/sbin/iptables -t nat -A POSTROUTING -m mark --mark 1 -j SNAT \
|
||||
--to-source $GREEN_ADDRESS
|
||||
if [ "$BLUE_DEV" != "" ]; then
|
||||
/sbin/iptables -t nat -A POSTROUTING -m mark --mark 2 -j SNAT --to-source $BLUE_ADDRESS
|
||||
fi
|
||||
if [ "$ORANGE_DEV" != "" ]; then
|
||||
/sbin/iptables -t nat -A POSTROUTING -m mark --mark 3 -j SNAT --to-source $ORANGE_ADDRESS
|
||||
fi
|
||||
|
||||
# run local firewall configuration, if present
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
/etc/sysconfig/firewall.local start
|
||||
fi
|
||||
|
||||
# last rule in input and forward chain is for logging.
|
||||
|
||||
if [ "$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
|
||||
/usr/local/bin/openvpnctrl --create-chains-and-rules
|
||||
;;
|
||||
stop)
|
||||
iptables_init
|
||||
# Accept everyting connected
|
||||
/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
|
||||
|
||||
# localhost and ethernet.
|
||||
/sbin/iptables -A INPUT -i lo -j ACCEPT
|
||||
/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT
|
||||
|
||||
if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
|
||||
/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
|
||||
/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
|
||||
fi
|
||||
if [ "$PROTOCOL" == "RFC1483" -a "$METHOD" == "DHCP" ]; then
|
||||
/sbin/iptables -A INPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
|
||||
/sbin/iptables -A INPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
|
||||
fi
|
||||
|
||||
# run local firewall configuration, if present
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
/etc/sysconfig/firewall.local stop
|
||||
fi
|
||||
|
||||
if [ "$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
|
||||
/usr/local/bin/openvpnctrl --delete-chains-and-rules
|
||||
;;
|
||||
;;
|
||||
reload)
|
||||
iptables_red
|
||||
|
||||
# run local firewall configuration, if present
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
/etc/sysconfig/firewall.local reload
|
||||
fi
|
||||
;;
|
||||
restart)
|
||||
$0 stop
|
||||
$0 stopovpn
|
||||
# run local firewall configuration, if present
|
||||
if [ -x /etc/sysconfig/firewall.local ]; then
|
||||
/etc/sysconfig/firewall.local stop
|
||||
fi
|
||||
$0 start
|
||||
$0 startovpn
|
||||
;;
|
||||
*)
|
||||
echo "Usage: $0 {start|stop|reload|restart}"
|
||||
echo "Usage: $0 {start|reload|restart}"
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
@@ -47,9 +47,7 @@ init_networking() {
|
||||
# (exit ${failed})
|
||||
# evaluate_retval
|
||||
|
||||
boot_mesg "Setting up DMZ pinholes"
|
||||
/usr/local/bin/setdmzholes; evaluate_retval
|
||||
|
||||
|
||||
if [ "$CONFIG_TYPE" = "3" -o "$CONFIG_TYPE" = "4" ]; then
|
||||
boot_mesg "Setting up wireless firewall rules"
|
||||
/usr/local/bin/wirelessctrl; evaluate_retval
|
||||
|
||||
Reference in New Issue
Block a user