Насчет внешнего ипа - у меня он динамичный Как тогда быть?
Вот содержание файерволла:
rc.firewall
#!/bin/sh -
# Suck in the configuration variables.
if [ -z "${source_rc_confs_defined}" ]; then
if [ -r /etc/defaults/rc.conf ]; then
. /etc/defaults/rc.conf
source_rc_confs
elif [ -r /etc/rc.conf ]; then
. /etc/rc.conf
fi
fi
############
# Define the firewall type in /etc/rc.conf. Valid values are:
# open - will allow anyone in
# client - will try to protect just this machine
# simple - will try to protect a whole network
# closed - totally disables IP services except via lo0 interface
# UNKNOWN - disables the loading of firewall rules.
# filename - will load the rules in the given filename (full path required)
#
# For ``client'' and ``simple'' the entries below should be customized
# appropriately.
############
#
# If you don't know enough about packet filtering, we suggest that you
# take time to read this book:
#
# Building Internet Firewalls, 2nd Edition
# Brent Chapman and Elizabeth Zwicky
#
# O'Reilly & Associates, Inc
# ISBN 1-56592-871-7
# http://www.ora.com/
# http://www.oreilly.com/catalog/fire2/
#
# For a more advanced treatment of Internet Security read:
#
# Firewalls & Internet Security
# Repelling the wily hacker
# William R. Cheswick, Steven M. Bellowin
#
# Addison-Wesley
# ISBN 0-201-63357-4
# http://www.awl.com/
# http://www.awlonline.com/product/0%2C2627%...>setup_loopback () {
############
# Only in rare cases do you want to change these rules
#
${fwcmd} add 100 pass all from any to any via lo0
${fwcmd} add 200 deny all from any to 127.0.0.0/8
${fwcmd} add 300 deny ip from 127.0.0.0/8 to any
}
if [ -n "${1}" ]; then
firewall_type="${1}"
fi
############
# Set quiet mode if requested
#
case ${firewall_quiet} in
[Yy][Ee][ss])
fwcmd="/sbin/ipfw -q"
;;
*)
fwcmd="/sbin/ipfw"
;;
esac
############
# Flush out the list before we begin.
#
${fwcmd} -f flush
############
# Network Address Translation. All packets are passed to natd(8)
# before they encounter your remaining rules. The firewall rules
# will then be run again on each packet after translation by natd
# starting at the rule number following the divert rule.
#
# For ``simple'' firewall type the divert rule should be put to a
# different place to not interfere with address-checking rules.
#
case ${firewall_type} in
[Oo][Pp][Ee][Nn]|[Cc][Ll][ii][Ee][Nn][Tt])
case ${natd_enable} in
[Yy][Ee][ss])
if [ -n "${natd_interface}" ]; then
${fwcmd} add 50 divert natd all from any to any via ${natd_interface}
fi
;;
esac
esac
############
# If you just configured ipfw in the kernel as a tool to solve network
# problems or you just want to disallow some particular kinds of traffic
# then you will want to change the default policy to open. You can also
# do this as your only action by setting the firewall_type to ``open''.
#
# ${fwcmd} add 65000 pass all from any to any
# Prototype setups.
#
case ${firewall_type} in
[Oo][Pp][Ee][Nn])
setup_loopback
${fwcmd} add 65000 pass all from any to any
;;
[Cc][Ll][ii][Ee][Nn][Tt])
############
# This is a prototype setup that will protect your system somewhat
# against people from outside your own network.
############
# set these to your network and netmask and ip
net="192.0.2.0"
mask="255.255.255.0"
ip="192.0.2.1"
setup_loopback
# Allow any traffic to or from my own net.
${fwcmd} add pass all from ${ip} to ${net}:${mask}
${fwcmd} add pass all from ${net}:${mask} to ${ip}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to ${ip} 25 setup
# Allow setup of outgoing TCP connections only
${fwcmd} add pass tcp from ${ip} to any setup
# Disallow setup of all other TCP connections
${fwcmd} add deny tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from ${ip} to any 53 keep-state
# Allow NTP queries out in the world
${fwcmd} add pass udp from ${ip} to any 123 keep-state
# Everything else is denied by default, unless the
# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
[ss][ii][Mm][Pp][Ll][Ee])
############
# This is a prototype setup for a simple firewall. Configure this
# machine as a DNS and NTP server, and point all the machines
# on the inside at this machine for those services.
############
# set these to your outside interface network and netmask and ip
oif="ed0"
onet="192.0.2.0"
omask="255.255.255.240"
oip="192.0.2.1"
# set these to your inside interface network and netmask and ip
iif="ed1"
inet="192.0.2.16"
imask="255.255.255.240"
iip="192.0.2.17"
setup_loopback
# Stop spoofing
${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
# Network Address Translation. This rule is placed here deliberately
# so that it does not interfere with the surrounding address-checking
# rules. If for example one of your internal LAN machines had its IP
# address set to 192.0.2.1 then an incoming packet for it after being
# translated by natd(8) would match the `deny' rule above. Similarly
# an outgoing packet originated from it before being translated would
# match the `deny' rule below.
case ${natd_enable} in
[Yy][Ee][ss])
if [ -n "${natd_interface}" ]; then
${fwcmd} add divert natd all from any to any via ${natd_interface}
fi
;;
esac
${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fwcmd} add pass all from any to any frag
# Allow setup of incoming email
${fwcmd} add pass tcp from any to ${oip} 25 setup
# Allow access to our DNS
${fwcmd} add pass tcp from any to ${oip} 53 setup
${fwcmd} add pass udp from any to ${oip} 53
${fwcmd} add pass udp from ${oip} 53 to any
# Allow access to our WWW
${fwcmd} add pass tcp from any to ${oip} 80 setup
# Reject&Log all setup of incoming connections from the outside
${fwcmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fwcmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fwcmd} add pass udp from ${oip} to any 53 keep-state
# Allow NTP queries out in the world
${fwcmd} add pass udp from ${oip} to any 123 keep-state
# Everything else is denied by default, unless the
# IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
[Cc][Ll][Oo][ss][Ee][Dd])
setup_loopback
;;
[uu][Nn][Kk][Nn][Oo][Ww][Nn])
;;
*)
if [ -r "${firewall_type}" ]; then
${fwcmd} ${firewall_flags} ${firewall_type}
fi
;;
esac
rc.firewall6
#!/bin/sh -
############
# Setup system for IPv6 firewall service.
# $FreeBSD: src/etc/rc.firewall6,v 1.15.2.1 2005/10/10 09:49:25 ume Exp $
# Suck in the configuration variables.
if [ -z "${source_rc_confs_defined}" ]; then
if [ -r /etc/defaults/rc.conf ]; then
. /etc/defaults/rc.conf
source_rc_confs
elif [ -r /etc/rc.conf ]; then
. /etc/rc.conf
fi
fi
############
# Define the firewall type in /etc/rc.conf. Valid values are:
# open - will allow anyone in
# client - will try to protect just this machine
# simple - will try to protect a whole network
# closed - totally disables IP services except via lo0 interface
# UNKNOWN - disables the loading of firewall rules.
# filename - will load the rules in the given filename (full path required)
#
# For ``client'' and ``simple'' the entries below should be customized
# appropriately.
############
#
# If you don't know enough about packet filtering, we suggest that you
# take time to read this book:
#
# Building Internet Firewalls, 2nd Edition
# Brent Chapman and Elizabeth Zwicky
#
# O'Reilly & Associates, Inc
# ISBN 1-56592-871-7
# http://www.ora.com/
# http://www.oreilly.com/catalog/fire2/
#
# For a more advanced treatment of Internet Security read:
#
# Firewalls & Internet Security
# Repelling the wily hacker
# William R. Cheswick, Steven M. Bellowin
#
# Addison-Wesley
# ISBN 0-201-63357-4
# http://www.awl.com/
# http://www.awlonline.com/product/0%2C2627%...
setup_local () {
############
# Only in rare cases do you want to change these rules
#
${fw6cmd} add 100 pass all from any to any via lo0
${fw6cmd} add 200 deny all from any to ::1
${fw6cmd} add 300 deny all from ::1 to any
#
# ND
#
# DAD
${fw6cmd} add pass ipv6-icmp from :: to ff02::/16
# RS, RA, NS, NA, redirect...
${fw6cmd} add pass ipv6-icmp from fe80::/10 to fe80::/10
${fw6cmd} add pass ipv6-icmp from fe80::/10 to ff02::/16
}
if [ -n "${1}" ]; then
ipv6_firewall_type="${1}"
fi
############
# Set quiet mode if requested
#
case ${ipv6_firewall_quiet} in
[Yy][Ee][ss])
fw6cmd="/sbin/ip6fw -q"
;;
*)
fw6cmd="/sbin/ip6fw"
;;
esac
############
# Flush out the list before we begin.
#
${fw6cmd} -f flush
############
# If you just configured ipfw in the kernel as a tool to solve network
# problems or you just want to disallow some particular kinds of traffic
# then you will want to change the default policy to open. You can also
# do this as your only action by setting the ipv6_firewall_type to ``open''.
#
# ${fw6cmd} add 65000 pass all from any to any
# Prototype setups.
#
case ${ipv6_firewall_type} in
[Oo][Pp][Ee][Nn])
setup_local
${fw6cmd} add 65000 pass all from any to any
;;
[Cc][Ll][ii][Ee][Nn][Tt])
############
# This is a prototype setup that will protect your system somewhat
# against people from outside your own network.
############
# set these to your network and prefixlen and ip
#
# This needs more work
#
net="2001:db8:2:1::"
prefixlen="64"
ip="2001:db8:2:1::1"
setup_local
# Allow any traffic to or from my own net.
${fw6cmd} add pass all from ${ip} to ${net}/${prefixlen}
${fw6cmd} add pass all from ${net}/${prefixlen} to ${ip}
# Allow any link-local multicast traffic
${fw6cmd} add pass all from fe80::/10 to ff02::/16
${fw6cmd} add pass all from ${net}/${prefixlen} to ff02::/16
# Allow TCP through if setup succeeded
${fw6cmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fw6cmd} add pass all from any to any frag
# Allow setup of incoming email
${fw6cmd} add pass tcp from any to ${ip} 25 setup
# Allow setup of outgoing TCP connections only
${fw6cmd} add pass tcp from ${ip} to any setup
# Disallow setup of all other TCP connections
${fw6cmd} add deny tcp from any to any setup
# Allow DNS queries out in the world
${fw6cmd} add pass udp from any 53 to ${ip}
${fw6cmd} add pass udp from ${ip} to any 53
# Allow NTP queries out in the world
${fw6cmd} add pass udp from any 123 to ${ip}
${fw6cmd} add pass udp from ${ip} to any 123
# Allow ICMPv6 destination unreach
${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
# Allow NS/NA/toobig (don't filter it out)
${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
# Everything else is denied by default, unless the
# IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
[ss][ii][Mm][Pp][Ll][Ee])
############
# This is a prototype setup for a simple firewall. Configure this
# machine as a DNS and NTP server, and point all the machines
# on the inside at this machine for those services.
############
# set these to your outside interface network and prefixlen and ip
oif="ed0"
onet="2001:db8:2:1::"
oprefixlen="64"
oip="2001:db8:2:1::1"
# set these to your inside interface network and prefixlen and ip
iif="ed1"
inet="2001:db8:2:2::"
iprefixlen="64"
iip="2001:db8:2:2::1"
setup_local
# Stop spoofing
${fw6cmd} add deny all from ${inet}/${iprefixlen} to any in via ${oif}
${fw6cmd} add deny all from ${onet}/${oprefixlen} to any in via ${iif}
# Stop unique local unicast address on the outside interface
${fw6cmd} add deny all from fc00::/7 to any via ${oif}
${fw6cmd} add deny all from any to fc00::/7 via ${oif}
# Stop site-local on the outside interface
${fw6cmd} add deny all from fec0::/10 to any via ${oif}
${fw6cmd} add deny all from any to fec0::/10 via ${oif}
# Disallow "internal" addresses to appear on the wire.
${fw6cmd} add deny all from ::ffff:0.0.0.0/96 to any via ${oif}
${fw6cmd} add deny all from any to ::ffff:0.0.0.0/96 via ${oif}
# Disallow packets to malicious IPv4 compatible prefix.
${fw6cmd} add deny all from ::224.0.0.0/100 to any via ${oif}
${fw6cmd} add deny all from any to ::224.0.0.0/100 via ${oif}
${fw6cmd} add deny all from ::127.0.0.0/104 to any via ${oif}
${fw6cmd} add deny all from any to ::127.0.0.0/104 via ${oif}
${fw6cmd} add deny all from ::0.0.0.0/104 to any via ${oif}
${fw6cmd} add deny all from any to ::0.0.0.0/104 via ${oif}
${fw6cmd} add deny all from ::255.0.0.0/104 to any via ${oif}
${fw6cmd} add deny all from any to ::255.0.0.0/104 via ${oif}
${fw6cmd} add deny all from ::0.0.0.0/96 to any via ${oif}
${fw6cmd} add deny all from any to ::0.0.0.0/96 via ${oif}
# Disallow packets to malicious 6to4 prefix.
${fw6cmd} add deny all from 2002:e000::/20 to any via ${oif}
${fw6cmd} add deny all from any to 2002:e000::/20 via ${oif}
${fw6cmd} add deny all from 2002:7f00::/24 to any via ${oif}
${fw6cmd} add deny all from any to 2002:7f00::/24 via ${oif}
${fw6cmd} add deny all from 2002:0000::/24 to any via ${oif}
${fw6cmd} add deny all from any to 2002:0000::/24 via ${oif}
${fw6cmd} add deny all from 2002:ff00::/24 to any via ${oif}
${fw6cmd} add deny all from any to 2002:ff00::/24 via ${oif}
${fw6cmd} add deny all from 2002:0a00::/24 to any via ${oif}
${fw6cmd} add deny all from any to 2002:0a00::/24 via ${oif}
${fw6cmd} add deny all from 2002:ac10::/28 to any via ${oif}
${fw6cmd} add deny all from any to 2002:ac10::/28 via ${oif}
${fw6cmd} add deny all from 2002:c0a8::/32 to any via ${oif}
${fw6cmd} add deny all from any to 2002:c0a8::/32 via ${oif}
${fw6cmd} add deny all from ff05::/16 to any via ${oif}
${fw6cmd} add deny all from any to ff05::/16 via ${oif}
# Allow TCP through if setup succeeded
${fw6cmd} add pass tcp from any to any established
# Allow IP fragments to pass through
${fw6cmd} add pass all from any to any frag
# Allow setup of incoming email
${fw6cmd} add pass tcp from any to ${oip} 25 setup
# Allow access to our DNS
${fw6cmd} add pass tcp from any to ${oip} 53 setup
${fw6cmd} add pass udp from any to ${oip} 53
${fw6cmd} add pass udp from ${oip} 53 to any
# Allow access to our WWW
${fw6cmd} add pass tcp from any to ${oip} 80 setup
# Reject&Log all setup of incoming connections from the outside
${fw6cmd} add deny log tcp from any to any in via ${oif} setup
# Allow setup of any other TCP connection
${fw6cmd} add pass tcp from any to any setup
# Allow DNS queries out in the world
${fw6cmd} add pass udp from any 53 to ${oip}
${fw6cmd} add pass udp from ${oip} to any 53
# Allow NTP queries out in the world
${fw6cmd} add pass udp from any 123 to ${oip}
${fw6cmd} add pass udp from ${oip} to any 123
# Allow RIPng
#${fw6cmd} add pass udp from fe80::/10 521 to ff02::9 521
#${fw6cmd} add pass udp from fe80::/10 521 to fe80::/10 521
# Allow ICMPv6 destination unreach
${fw6cmd} add pass ipv6-icmp from any to any icmptypes 1
# Allow NS/NA/toobig (don't filter it out)
${fw6cmd} add pass ipv6-icmp from any to any icmptypes 2,135,136
# Everything else is denied by default, unless the
# IPV6FIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel
# config file.
;;
[Cc][Ll][Oo][ss][Ee][Dd])
# Only enable the loopback interface
${fw6cmd} add 100 pass all from any to any via lo0
;;
[uu][Nn][Kk][Nn][Oo][Ww][Nn])
;;
*)
if [ -r "${ipv6_firewall_type}" ]; then
${fw6cmd} ${ipv6_firewall_flags} ${ipv6_firewall_type}
fi
;;
esac
Ну вот в принципе и все. Честно сказать, я мало понимаю в этом... Во всем, что относится к юниксам и сетям я чайник.
