I am new to unix but I have managed to setup a home network using Free BSD. The
FreeBSD box is a gateway/firewall/router for my Windows XP box and a wireless access
point. The XP box can access the web just great using the shared connection.
My problem is when email is used on the WindowsXP box , no messages can be
sent out. I can receive email from my ISP's pop-server just fine. I am not sure if I need
to start some kind of mail daemon or what???? Is it my firewall configuration????
I have included some of my setup files, hopefully someone can tell me what I am doing
wrong. Thanks in advance......
___________________________________
rc.conf
hostname=".SNOOPY"
network_interfaces="vr0 rl0 lo0"
ifconfig_vr0="DHCP"
ifconfig_rl0="inet 192.168.1.1 netmask 255.255.255.0"
linux_enable="YES"
moused_enable="YES"
moused_port="/dev/psm0"
moused_type="auto"
usbd_enable="YES"
#defaultrouter=`ifconfig vr0 |grep "inet "|awk '{print $6}'`
gateway_enable="YES"
firewall_enable="YES" firewall_type="simple" firewall_quiet="NO" natd_enable="YES" natd_interface="vr0" natd_flags="-f /etc/natd.conf"
tcp_drop_synfin="YES"
# Enable ip6fw. #ipv6_firewall_enable="YES" #ipv6_firewall_type="type" # see rc.firewall6 for what goes here #ipv6_firewall_quiet="NO"
# Setup caching only name server named_enable="YES"
# This file now contains just the overrides from /etc/defaults/rc.conf. # Please make all changes to this file, not to /etc/defaults/rc.conf.
# Enable network daemons for user convenience. # Created: Sat Apr 17 09:50:48 2004
linux_enable="YES"
# This file now contains just the overrides from /etc/defaults/rc.conf. # Please make all changes to this file, not to /etc/defaults/rc.conf.
# Enable network daemons for user convenience. # Created: Sat Apr 17 12:58:28 2004 # -- sysinstall generated deltas -- # Sat Apr 17 12:58:28 2004 inetd_enable="YES" _______________________________________________________
rc.firewall using natd & the simple define
#!/bin/sh - # Copyright (c) 1996 Poul-Henning Kamp # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # # $FreeBSD: src/etc/rc.firewall,v 1.47 2003/11/02 07:31:44 ru Exp $ #
# # Setup system for firewall service. #
# 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.
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
############ # 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
[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="vr0"
onet=`ifconfig vr0 | grep "inet "| awk '{print $6}'`
omask=`ifconfig vr0 | grep "inet "| awk '{print $4}'`
#"255.255.255.255"
oip=`ifconfig vr0 | grep "inet "| awk '{print $2}'`# set these to your inside interface network and netmask and ip iif="rl0" inet="192.168.1.0" imask="255.255.255.0" iip="192.168.1.1"
# My ISP's DNS servers dns1="24.25.5.50" dns2="24.25.5.106" dns3="24.25.5.107"
setup_loopback
# Add internal traffic
${fwcmd} add allow all from any to any via ${iif} # 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
# Stop RFC1918 nets on the outside interface
${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 in via {oif}
${fwcmd} add pass tcp from any to ${oip} 110 setup in via {oif}
${fwcmd} add pass tcp from any to ${oip} 995 setup in via {oif} # 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
# DNS - Allow queries out in the world
${fwcmd} add pass udp from any to ${dns1} 53
${fwcmd} add pass udp from any to ${dns2} 53
${fwcmd} add pass udp from any to ${dns3} 53
${fwcmd} add pass udp from ${dns1} 53 to any
${fwcmd} add pass udp from ${dns2} 53 to any
${fwcmd} add pass udp from ${dns3} 53 to any # Allow NTP queries out in the world
${fwcmd} add pass udp from ${oip} to any 123 keep-state### ICMP RULES
# ICMP packets
# Allow all ICMP packets on internal interface
${fwcmd} add pass icmp from any to any via ${iif}# Allow outgoing pings
${fwcmd} add pass icmp from any to any icmptypes 8 out via ${oif}
${fwcmd} add pass icmp from any to any icmptypes 0 in via ${oif}# Allow Destination Unreachable, Source Quench, Time Exceeded, and Bad Header
${fwcmd} add pass icmp from any to any icmptypes 3,4,11,12 via ${oif}
# Deny the rest of them
#${fwcmd} add deny icmp from any to any
# Everything else is denied by default, unless the # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel # config file. ;;
___________________________________________ -- Any help will be greatly appreciated. Peter
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