Firewall-SOSDG/options.default

# I'm trying to make this config as simple as possible.  Comment out
# options you don't want to use, uncomment them to use them.
# Don't forget to rename this file to 'options'!

# Config file version.  Don't change this.  Will be used some day to
# figure out if we need to alert the user that they need to redo their
# config file.
CONFIG_VERSION=0.9

# This is for testing purposes.
IPTABLES=/bin/true
IP6TABLES=/bin/true

# Uncomment below to actually activate firewall
#IPTABLES=/sbin/iptables
#IP6TABLES=/sbin/ip6tables

# This is important for loading kernel modules
MODPROBE=/sbin/modprobe

# Extra modules to load such as ftp connection tracking
#MODULES_LOAD="nf_conntrack_ftp nf_conntrack_h323 nf_conntrack_irc nf_conntrack_pptp nf_conntrack_proto_gre nf_conntrack_proto_sctp nf_conntrack_proto_udplite nf_conntrack_sip nf_conntrack_tftp nf_conntrack_sane"

# Run commands before/after rules
PRERUN="$BASEDIR/conf/prerun"
POSTRUN="$BASEDIR/conf/postrun"

# Do we want NAT/Conntrack/Forward features?
#NAT=1
#CONNTRACK=1
#FORWARD=1

# Use old style state matches or new conntrack matches?
# By default, lets use conntrack.
#STATE_TYPE="conntrack"

# Blocking incoming connections by default?
#BLOCKINCOMING=1

# Clamp MSS, useful on DSL/VPN links
# Space separated list of interfaces to apply this on
#CLAMPMSS="ppp0 eth0"


# Default IPv4 policies
# IPV4_PINPUT set to DROP is different from BLOCKINCOMING,
# as BLOCKINCOMING only blocks syn packets for TCP while still
# allowing established connections even if connection tracking is off.
# BLOCKINCOMING does however, deny all incoming UDP just like INPUT=DROP does.
IPV4_PINPUT=ACCEPT
IPV4_POUTPUT=ACCEPT
IPV4_PFORWARD=DROP

# Do we run a LAN DHCP server?  Put the interfaces here
# where this server is providing services.
#LANDHCPSERVER="eth0 eth1"

# Primary external interface
# Can be an interface name (ppp0, eth0) or auto
# which will try to detect the proper interface,
# but requires a default route to be properly setup
# first.
# We recommend manually defining this unless you really
# need to automagically detect the interface.
EXTIF="eth0"

# Primary external IP address
# Can be an IP address or auto, which will try to detect
# the primary external IP using the information from EXTIF
# This is mostly useful for people who have a dynamic external
# IP address.  Everyone else should manually define this to
# avoid potential detection issues.
EXTIP="auto"

# Program/script for finding the default external interface
# Only used if EXTIF is set to auto
#
# If you need to write your own script to find the info, change below
#EXTIF_FIND="$BASEDIR/bin/get_default_if"

# Pattern for finding the default external interface IP address
# Only used if EXTIP is set to auto
#
# If you need to write your own script to find the info, change below
# note that the script passes the interface from $EXTIF as first option
#EXTIP_FIND="$BASEDIR/bin/get_default_ip"

# Internal Interface
#INTINF=ppp+

# Port forwardings, requires NAT
#PORTFW=$BASEDIR/conf/port-forwards

# Multiport support?
# yes/no/auto  (auto will try to detect if we support multiport or not,
# may not always work but is recommended unless you have a reason otherwise)
IPTABLES_MULTIPORT=auto

# Multiport options - use to override defaults
#NF_MULTIPORT="xt_multiport"
#NF_MULTIPORT_MAX_PORTS="7"

# Allow outgoing DNS requests - important if you did not activate connection
# tracking.  Set this to the interfaces you wish to use for outgoing requests
# plus the IP addresses of your upstream servers (recommended up to 3) if you need to.
#DNS_REQUESTS_OUT="eth0|4.2.2.1|4.2.2.2|4.2.2.3 eth1"

# TCP/UDP/Protocol to allow
TCPPORTS="20 21 22 53 80 113 123 443"
UDPPORTS="53"

# common protocols to allow include ipsec, gre, and ipv6
ALLOWEDPROTO="41 47 50 51"

# IPs that are allowed to bypass firewall
TRUSTEDIP="127.0.0.1"

# Don't track these IPs, useful in some occasions.  Don't
# use otherwise.
DONTTRACK="127.0.0.1"

# Allowed IPs and ports
# this is a more advanced form of TCPPORTS and UDPPORTS,
# and will eventually replace it
#IPV4_ALLOWED=$BASEDIR/conf/ipv4-allowed

# Intercept IPv4 packets for use in a transparent proxy
#IPV4_INTERCEPT=$BASEDIR/conf/ipv4-intercept

# IP range(s) to forward
#ROUTING=$BASEDIR/conf/ipv4-routing

# Mark ipv4 packets for advanced purposes
#IPv4_MARK=$BASEDIR/conf/ipv4-marks

# IP NAT Rules
# SNAT:<INT IF>:<INT IP>:<EXT IF>:<EXT IP>
# MASQ:<INT IF>:<INT IP>:<EXT IF>
# NETMAP:<INT IF>:<INT IP RANGE>:<EXT IF>:<EXT IP RANGE>
#NAT_RANGE=""


# Hacks to either block specific kinds of attacks or fix problems
#
# NS-IN-DDOS - 			Block DNS DDoS using NS/IN spoof, see:
# http://www.stupendous.net/archives/2009/01/24/dropping-spurious-nsin-recursive-queries/
# 
# MULTI-NIC-ARP-LOCK -	By default, in Linux, arp requests may be answered by interfaces that
#						do not actually have the IP in question.  In some (alot in my case),
#						I have things going through specific wires for a reason.  This fixes
#						that and makes it behave as expected.
#
HACK_IPV4="NS-IN-DDOS"

# IP NAT Rules
# SNAT:<INT IF>:<INT IP>:<EXT IF>:<EXT IP>
# MASQ:<INT IF>:<INT IP>:<EXT IF>
#NAT_RANGE=

# IP Ranges to block all traffic incoming/outgoing
# New functionality in 0.9.8 obsoletes BLOCKTCPPORTS and BLOCKUDPPORTS
BLOCKEDIP=$BASEDIR/conf/ipv4-blocked

# Strip ECN off of packets - helps with blackholes
# Either individual IPs or 0.0.0.0/0
#STRIPECN="0.0.0.0/0"

# Block private LAN traffic (RFC reserved space) going OUT on these interfaces
# for security reasons.  This has the potential to cause issues if your
# provider uses private IP space for uplinks in PPPoE/PPPoA, so don't use it
# and use BLOCK_INCOMING_RFC1981 instead.
#BLOCK_OUTGOING_RFC1918="ppp0"

# Block private LAN traffic (RFC reserved space) coming IN on these interfaces
# for security reasons.  This is a bit more safer to use if your provider uses
# private IP space for the other end of PPP links.
#BLOCK_INCOMING_RFC1918="ppp0"

# RFC1918 Space override, don't change or uncomment this unless you absolutely need to
#RFC1918_SPACE="192.168.0.0/16 172.16.0.0/12 10.0.0.0/8"


# IPv6 related features.  Commenting out IPV6 variable disables ALL
# IPv6 related items
#IPV6=1

# Do we want IPv6 FORWARD and Connection tracking features?
#IPV6_FORWARD=1
#IPV6_CONNTRACK=1

# Default IPv6 policies
# IPV6_PINPUT set to DROP is different from IPV6_BLOCKINCOMING,
# as BLOCKINCOMING only blocks syn packets for TCP while still
# allowing established connections even if connection tracking is off.
# BLOCKINCOMING does however, deny all incoming UDP just like INPUT=DROP does.
IPV6_PINPUT=ALLOW
IPV6_POUTPUT=ALLOW
IPV6_PFORWARD=DROP

# Allow outgoing DNS requests - important if you did not activate connection
# tracking.  Set this to the interfaces you wish to use for outgoing requests
# plus the IP addresses of your upstream servers (recommended up to 3) if you need to.
#IPV6_DNS_REQUESTS_OUT="eth0|2001::1|2001::2|2001::3 eth1"

# Default block all incoming ipv6 connections?
#IPV6_BLOCKINCOMING=1

# Special case for routers that have ipv6 clients behind them.
# Useful if clients do not have proper ipv6 firewalls.  Give list
# of IPv6 netblocks to enable this on.
#IPV6_ROUTEDCLIENTBLOCK=""

# IP range(s) to forward
#IPV6_ROUTING=$BASEDIR/conf/ipv6-routing

# Mark ipv6 packets for advanced purposes
#IPV6_MARK=$BASEDIR/conf/ipv6-marks

# IPv6 Ranges to block all traffic incoming/outgoing
#IPV6_BLOCKEDIP=$BASEDIR/conf/ipv6-blocked

# Clamp MSS, useful on DSL/VPN links
# Space separated list of interfaces to apply this on
# it may be used eventually.
#IPV6_CLAMPMSS="he-ipv6"

# Interface IPv6 comes in on (either tunnel or real network interface)
#IPV6_INT=he-ipv6

# LAN interface for IPv6
#IPV6_LAN=eth1

# Trusted IPv6 ranges
#IPV6_TRUSTED="::1"

# Do we run a LAN DHCP server?  Put the interfaces here
# where this server is providing services.
#IPV6_LANDHCPSERVER="eth0 eth1"

# Allowed incoming IPv6 ports (for now, use $TCPPORTS and $UDPPORTS to
# have same for both ipv4 and ipv6)
#IPV6_TCPPORTS=$TCPPORTS
#IPV6_UDPPORTS=$UDPPORTS

# Allowed IPv6 IPs and ports
# this is a more advanced form of IPV6_TCPPORTS and IPV6_UDPPORTS,
# and will eventually replace it
#IPV6_ALLOWED=$BASEDIR/conf/ipv6-allowed

# IPv6 range to forward
#IPV6_FORWARDRANGE=""

# Allow critical ICMP messages to go through, such as packet too big.
# You should _really_ make sure you don't disable this if you have any
# kind of MTU changes inside or outside your network.
# Allows: time-exceeded packet-too-big
IPV6_ICMP_CRITICAL=1

# Allow other common IPV6 ICMP messages through the firewall.  Though not
# really critical, these can help with general IPv6 usage/diagnostic
# Allows: destination-unreachable parameter-problem
#IPV6_ICMP_OPT=1