DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
fi
+function iptables() {
+ /sbin/iptables --wait "$@"
+}
+
iptables_init() {
# Flush all rules and delete all custom chains
- /sbin/iptables -F
- /sbin/iptables -t nat -F
- /sbin/iptables -t mangle -F
- /sbin/iptables -X
- /sbin/iptables -t nat -X
- /sbin/iptables -t mangle -X
+ iptables -F
+ iptables -t nat -F
+ iptables -t mangle -F
+ iptables -X
+ iptables -t nat -X
+ iptables -t mangle -X
# Set up policies
- /sbin/iptables -P INPUT DROP
- /sbin/iptables -P FORWARD DROP
- /sbin/iptables -P OUTPUT ACCEPT
+ iptables -P INPUT DROP
+ iptables -P FORWARD DROP
+ iptables -P OUTPUT ACCEPT
# Empty LOG_DROP and LOG_REJECT chains
- /sbin/iptables -N LOG_DROP
- /sbin/iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
- /sbin/iptables -A LOG_DROP -j DROP
- /sbin/iptables -N LOG_REJECT
- /sbin/iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
- /sbin/iptables -A LOG_REJECT -j REJECT
+ iptables -N LOG_DROP
+ iptables -A LOG_DROP -m limit --limit 10/minute -j LOG
+ iptables -A LOG_DROP -j DROP
+ iptables -N LOG_REJECT
+ iptables -A LOG_REJECT -m limit --limit 10/minute -j LOG
+ iptables -A LOG_REJECT -j REJECT
# This chain will log, then DROPs packets with certain bad combinations
# of flags might indicate a port-scan attempt (xmas, null, etc)
- /sbin/iptables -N PSCAN
+ iptables -N PSCAN
if [ "$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"
+ iptables -A PSCAN -p tcp -m limit --limit 10/minute -j LOG --log-prefix "DROP_TCP Scan " -m comment --comment "DROP_TCP PScan"
+ iptables -A PSCAN -p udp -m limit --limit 10/minute -j LOG --log-prefix "DROP_UDP Scan " -m comment --comment "DROP_UDP PScan"
+ iptables -A PSCAN -p icmp -m limit --limit 10/minute -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
+ 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"
+ 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
+ iptables -N NEWNOTSYN
if [ "$DROPNEWNOTSYN" == "on" ]; then
- /sbin/iptables -A NEWNOTSYN -m limit --limit 10/minute -j LOG --log-prefix "DROP_NEWNOTSYN "
+ 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"
+ 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
+ iptables -N BADTCP
- #Don't check loopback
- /sbin/iptables -A BADTCP -i lo -j RETURN
+ # Don't check loopback
+ 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
+ iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
# Null
- /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
+ iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
# FIN
- /sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
+ iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
# SYN/RST (also catches xmas variants that set SYN+RST+...)
- /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
+ iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
# SYN/FIN (QueSO or nmap OS probe)
- /sbin/iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
+ 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 conntrack --ctstate NEW -j NEWNOTSYN
+ iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
- /sbin/iptables -A INPUT -p tcp -j BADTCP
- /sbin/iptables -A FORWARD -p tcp -j BADTCP
+ iptables -A INPUT -p tcp -j BADTCP
+ 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
+ iptables -N CONNTRACK
+ 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
+ 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
+ iptables -N CUSTOMINPUT
+ iptables -A INPUT -j CUSTOMINPUT
+ iptables -N CUSTOMFORWARD
+ iptables -A FORWARD -j CUSTOMFORWARD
+ iptables -N CUSTOMOUTPUT
+ iptables -A OUTPUT -j CUSTOMOUTPUT
+ iptables -t nat -N CUSTOMPREROUTING
+ iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
+ iptables -t nat -N CUSTOMPOSTROUTING
+ 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
+ iptables -N GUARDIAN
+ iptables -A INPUT -j GUARDIAN
+ 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
+ iptables -N OVPNBLOCK
+ for i in INPUT FORWARD; do
+ iptables -A ${i} -j OVPNBLOCK
done
# OpenVPN transfer network translation
- /sbin/iptables -t nat -N OVPNNAT
- /sbin/iptables -t nat -A POSTROUTING -j OVPNNAT
+ iptables -t nat -N OVPNNAT
+ 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
+ iptables -N IPTVINPUT
+ iptables -A INPUT -j IPTVINPUT
+ iptables -N IPTVFORWARD
+ 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
+ iptables -N GUIINPUT
+ iptables -A INPUT -j GUIINPUT
+ 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
+ iptables -N LOOPBACK
+ iptables -A LOOPBACK -i lo -j ACCEPT
+ 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
+ iptables -A LOOPBACK -s 127.0.0.0/8 -j DROP
+ iptables -A LOOPBACK -d 127.0.0.0/8 -j DROP
for i in INPUT FORWARD OUTPUT; do
- /sbin/iptables -A ${i} -j LOOPBACK
+ iptables -A ${i} -j LOOPBACK
done
# Accept everything connected
for i in INPUT FORWARD OUTPUT; do
- /sbin/iptables -A ${i} -j CONNTRACK
+ 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
+ iptables -N IPSECINPUT
+ iptables -N IPSECFORWARD
+ iptables -N IPSECOUTPUT
+ iptables -A INPUT -j IPSECINPUT
+ iptables -A FORWARD -j IPSECFORWARD
+ iptables -A OUTPUT -j IPSECOUTPUT
+ iptables -t nat -N IPSECNAT
+ 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
+ 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
+ iptables -N DHCPBLUEINPUT
+ 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
+ iptables -N WIRELESSINPUT
+ iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
+ iptables -N WIRELESSFORWARD
+ iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
+
+ # OpenVPN
+ iptables -N OVPNINPUT
+ iptables -A INPUT -j OVPNINPUT
# TOR
- /sbin/iptables -N TOR_INPUT
- /sbin/iptables -A INPUT -j TOR_INPUT
+ iptables -N TOR_INPUT
+ iptables -A INPUT -j TOR_INPUT
# Jump into the actual firewall ruleset.
- /sbin/iptables -N INPUTFW
- /sbin/iptables -A INPUT -j INPUTFW
+ iptables -N INPUTFW
+ iptables -A INPUT -j INPUTFW
- /sbin/iptables -N OUTGOINGFW
- /sbin/iptables -A OUTPUT -j OUTGOINGFW
+ iptables -N OUTGOINGFW
+ iptables -A OUTPUT -j OUTGOINGFW
- /sbin/iptables -N FORWARDFW
- /sbin/iptables -A FORWARD -j FORWARDFW
+ iptables -N FORWARDFW
+ iptables -A FORWARD -j FORWARDFW
+
+ # SNAT rules
+ iptables -t nat -N NAT_SOURCE
+ iptables -t nat -A POSTROUTING -j NAT_SOURCE
# 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 -N REDINPUT
+ iptables -A INPUT -j REDINPUT
+ iptables -N REDFORWARD
+ iptables -A FORWARD -j REDFORWARD
+ iptables -t nat -N REDNAT
+ 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
+ iptables -t nat -N SQUID
+ 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
+ iptables -t nat -N NAT_DESTINATION
+ iptables -t nat -A PREROUTING -j NAT_DESTINATION
# 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
+ iptables -t nat -N UPNPFW
+ iptables -t nat -A PREROUTING -j UPNPFW
+ iptables -N UPNPFW
+ 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
+ # Apply OpenVPN firewall rules
+ /usr/local/bin/openvpnctrl --firewall-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
+ # POLICY CHAIN
+ iptables -N POLICYIN
+ iptables -A INPUT -j POLICYIN
+ iptables -N POLICYFWD
+ iptables -A FORWARD -j POLICYFWD
+ iptables -N POLICYOUT
+ iptables -A OUTPUT -j POLICYOUT
/usr/sbin/firewall-policy
# read new firewall
- /usr/local/bin/forwardfwctrl
+ /usr/local/bin/firewallctrl
if [ "$DROPINPUT" == "on" ]; then
- /sbin/iptables -A INPUT -m limit --limit 10/minute -j LOG --log-prefix "DROP_INPUT"
+ 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"
+ iptables -A INPUT -j DROP -m comment --comment "DROP_INPUT"
if [ "$DROPFORWARD" == "on" ]; then
- /sbin/iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
+ iptables -A FORWARD -m limit --limit 10/minute -j LOG --log-prefix "DROP_FORWARD"
fi
- /sbin/iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD"
+ iptables -A FORWARD -j DROP -m comment --comment "DROP_FORWARD"
}
iptables_red() {
- /sbin/iptables -F REDINPUT
- /sbin/iptables -F REDFORWARD
- /sbin/iptables -t nat -F REDNAT
+ iptables -F REDINPUT
+ iptables -F REDFORWARD
+ iptables -t nat -F REDNAT
# PPPoE / PPTP Device
if [ "$IFACE" != "" ]; then
# PPPoE / PPTP
if [ "$DEVICE" != "" ]; then
- /sbin/iptables -A REDINPUT -i $DEVICE -j ACCEPT
+ iptables -A REDINPUT -i $DEVICE -j ACCEPT
fi
if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
if [ "$RED_DEV" != "" ]; then
- /sbin/iptables -A REDINPUT -i $RED_DEV -j ACCEPT
+ iptables -A REDINPUT -i $RED_DEV -j ACCEPT
fi
fi
fi
# PPTP over DHCP
if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
- /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
- /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
+ iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
+ iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
fi
# Orange pinholes
# This rule enables a host on ORANGE network to connect to the outside
# (only if we have a red connection)
if [ "$IFACE" != "" ]; then
- /sbin/iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
+ iptables -A REDFORWARD -i $ORANGE_DEV -o $IFACE -j ACCEPT
fi
fi
if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
# DHCP
if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
- /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
- /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
+ iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
+ iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
fi
if [ "$METHOD" == "DHCP" -a "$PROTOCOL" == "RFC1483" ]; then
- /sbin/iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
- /sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
+ iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
+ iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
fi
# 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
+ iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
+ iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
fi
}
projects / people / teissler / ipfire-2.x.git / blobdiff