forked from extern/shorewall_code
eeae3ac04f
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@1128 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
651 lines
30 KiB
XML
651 lines
30 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<article>
|
|
<!--$Id$-->
|
|
|
|
<articleinfo>
|
|
<title>About My Network</title>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<firstname>Tom</firstname>
|
|
|
|
<surname>Eastep</surname>
|
|
</author>
|
|
</authorgroup>
|
|
|
|
<pubdate>2004-01-20</pubdate>
|
|
|
|
<copyright>
|
|
<year>2001-2004</year>
|
|
|
|
<holder>Thomas M. Eastep</holder>
|
|
</copyright>
|
|
|
|
<legalnotice>
|
|
<para>Permission is granted to copy, distribute and/or modify this
|
|
document under the terms of the GNU Free Documentation License, Version
|
|
1.2 or any later version published by the Free Software Foundation; with
|
|
no Invariant Sections, with no Front-Cover, and with no Back-Cover
|
|
Texts. A copy of the license is included in the section entitled
|
|
<quote><ulink url="GnuCopyright.htm">GNU Free Documentation License</ulink></quote>.</para>
|
|
</legalnotice>
|
|
</articleinfo>
|
|
|
|
<section>
|
|
<title>My Current Network</title>
|
|
|
|
<caution>
|
|
<para>I use a combination of One-to-one NAT and Proxy ARP, neither of
|
|
which are relevant to a simple configuration with a single public IP
|
|
address. If you have just a single public IP address, most of what you
|
|
see here won't apply to your setup so beware of copying parts of
|
|
this configuration and expecting them to work for you. What you copy may
|
|
or may not work in your configuration.</para>
|
|
</caution>
|
|
|
|
<caution>
|
|
<para>The configuration shown here corresponds to Shorewall version
|
|
1.4.9. It may use features not available in earlier Shorewall releases.</para>
|
|
</caution>
|
|
|
|
<para>I have DSL service and have 5 static IP addresses
|
|
(206.124.146.176-180). My DSL <quote>modem</quote> (Fujitsu Speedport) is
|
|
connected to eth0. I have a local network connected to eth2 (subnet
|
|
192.168.1.0/24), a DMZ connected to eth1 (192.168.2.0/24) and a Wireless
|
|
network connected to eth3 (192.168.3.0/24).</para>
|
|
|
|
<para>I use:</para>
|
|
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>One-to-one NAT for Ursa (my personal system that dual-boots
|
|
Mandrake 9.2 and Windows XP) - Internal address 192.168.1.5 and
|
|
external address 206.124.146.178.</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>One-to-one NAT for EastepLaptop (My work system -- Windows XP
|
|
SP2). Internal address 192.168.1.7 and external address
|
|
206.124.146.180.</para>
|
|
</listitem>
|
|
|
|
<listitem>
|
|
<para>SNAT through 206.124.146.179 for  my SuSE 9.0 Linux
|
|
system (Wookie), my Wife's Windows XP system (Tarry), and
|
|
our  Windows XP laptop (Tipper) which connects through the
|
|
Wireless Access Point (wap) via a Wireless Bridge (bridge).<note><para>While
|
|
the distance between the WAP and where I usually use the laptop
|
|
isn't very far (25 feet or so), using a WAC11 (CardBus wireless
|
|
card) has proved very unsatisfactory (lots of lost connections). By
|
|
replacing the WAC11 with the WET11 wireless bridge, I have virtually
|
|
eliminated these problems (Being an old radio tinkerer (K7JPV), I was
|
|
also able to eliminate the disconnects by hanging a piece of aluminum
|
|
foil on the family room wall. Needless to say, my wife Tarry rejected
|
|
that as a permanent solution :-).</para></note></para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
|
|
<para>The firewall runs on a 256MB PII/233 with Debian Sarge (Testing).</para>
|
|
|
|
<para>Wookie, Ursa and the Firewall all run Samba and the Firewall acts as
|
|
a WINS server.</para>
|
|
|
|
<para>The wireless network connects to eth3 via a LinkSys WAP11. 
|
|
In additional to using the rather weak WEP 40-bit encryption (64-bit with
|
|
the 24-bit preamble), I use <ulink url="MAC_Validation.html">MAC
|
|
verification</ulink>. This is still a weak combination and if I lived near
|
|
a wireless <quote>hot spot</quote>, I would probably add IPSEC or
|
|
something similar to my WiFi->local connections.</para>
|
|
|
|
<para>The single system in the DMZ (address 206.124.146.177) runs postfix,
|
|
Courier IMAP (imaps and pop3), DNS, a Web server (Apache) and an FTP
|
|
server (Pure-ftpd) under RedHat 9.0. The system also runs fetchmail to
|
|
fetch our email from our old and current ISPs. That server is managed
|
|
through Proxy ARP.</para>
|
|
|
|
<para>The firewall system itself runs a DHCP server that serves the local
|
|
network.</para>
|
|
|
|
<para>All administration and publishing is done using ssh/scp. I have a
|
|
desktop environment installed on the firewall but I am not usually logged
|
|
in to it. X applications tunnel through SSH to Ursa. The server also has a
|
|
desktop environment installed and that desktop environment is available
|
|
via XDMCP from the local zone. For the most part though, X tunneled
|
|
through SSH is used for server administration and the server runs at run
|
|
level 3 (multi-user console mode on RedHat).</para>
|
|
|
|
<para>I run an SNMP server on my firewall to serve <ulink
|
|
url="http://www.ee.ethz.ch/~oetiker/webtools/mrtg/">MRTG</ulink> running
|
|
in the DMZ.<graphic align="center" fileref="images/network.png" />The
|
|
ethernet interface in the Server is configured with IP address
|
|
206.124.146.177, netmask 255.255.255.0. The server's default gateway
|
|
is 206.124.146.254 (Router at my ISP. This is the same default gateway
|
|
used by the firewall itself). On the firewall, an entry in my
|
|
/etc/network/interfaces file (see below) adds a host route to
|
|
206.124.146.177 through eth1 when that interface is brought up.</para>
|
|
|
|
<para>Ursa (192.168.1.5 A.K.A. 206.124.146.178) runs a PPTP server for
|
|
Road Warrior access.</para>
|
|
|
|
<section>
|
|
<title>Shorewall.conf</title>
|
|
|
|
<blockquote>
|
|
<programlisting>LOGFILE=/var/log/messages
|
|
LOGRATE=
|
|
LOGBURST=
|
|
LOGUNCLEAN=$LOG
|
|
BLACKLIST_LOGLEVEL=
|
|
LOGNEWNOTSYN=
|
|
MACLIST_LOG_LEVEL=$LOG
|
|
TCP_FLAGS_LOG_LEVEL=$LOG
|
|
RFC1918_LOG_LEVEL=$LOG
|
|
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
|
|
SHOREWALL_SHELL=/bin/ash
|
|
SUBSYSLOCK=/var/lock/subsys/shorewall
|
|
STATEDIR=/var/state/shorewall
|
|
MODULESDIR=
|
|
FW=fw
|
|
IP_FORWARDING=On
|
|
ADD_IP_ALIASES=Yes
|
|
ADD_SNAT_ALIASES=Yes
|
|
TC_ENABLED=Yes
|
|
CLEAR_TC=No
|
|
MARK_IN_FORWARD_CHAIN=No
|
|
CLAMPMSS=Yes
|
|
ROUTE_FILTER=No
|
|
NAT_BEFORE_RULES=No
|
|
DETECT_DNAT_IPADDRS=Yes
|
|
MUTEX_TIMEOUT=60
|
|
NEWNOTSYN=Yes
|
|
BLACKLIST_DISPOSITION=DROP
|
|
MACLIST_DISPOSITION=REJECT
|
|
TCP_FLAGS_DISPOSITION=DROP
|
|
SHARED_DIR=/usr/share/shorewall</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Params File (Edited)</title>
|
|
|
|
<blockquote>
|
|
<para><programlisting>MIRRORS=<list of shorewall mirror ip addresses>
|
|
NTPSERVERS=<list of the NTP servers I sync with>
|
|
TEXAS=<ip address of gateway in Dallas>
|
|
LOG=info</programlisting></para>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Zones File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ZONE DISPLAY COMMENTS
|
|
net Internet Internet
|
|
WiFi Wireless Wireless Network on eth3
|
|
dmz DMZ Demilitarized zone
|
|
loc Local Local networks
|
|
tx Texas Peer Network in Dallas
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Interfaces File</title>
|
|
|
|
<blockquote>
|
|
<para>This is set up so that I can start the firewall before bringing
|
|
up my Ethernet interfaces.</para>
|
|
|
|
<programlisting>#ZONE INERFACE BROADCAST OPTIONS
|
|
net eth0 206.124.146.255 dhcp,norfc1918,routefilter,blacklist,tcpflags
|
|
loc eth2 192.168.1.255 dhcp
|
|
dmz eth1 192.168.2.255
|
|
WiFi eth3 192.168.3.255 dhcp,maclist
|
|
- texas 192.168.9.255
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Hosts File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ZONE HOST(S) OPTIONS
|
|
tx              texas:192.168.8.0/22
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Routestopped File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#INTERFACE HOST(S)
|
|
eth1 206.124.146.177
|
|
eth2 -
|
|
eth3 192.168.3.0/24
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section id="RFC1918">
|
|
<title>RFC1918 File</title>
|
|
|
|
<blockquote>
|
|
<para>I use a stripped-down file which doesn't have to be updated
|
|
when the IANA allocates a block of IP addresses.</para>
|
|
</blockquote>
|
|
|
|
<blockquote>
|
|
<programlisting>#SUBNET TARGET
|
|
169.254.0.0/16 DROP # DHCP autoconfig
|
|
172.16.0.0/12 logdrop # RFC 1918
|
|
192.0.2.0/24 logdrop # Example addresses
|
|
192.168.0.0/16 logdrop # RFC 1918
|
|
10.24.60.56 DROP # Some idiot in my broadcast domain
|
|
# has a box configured with this
|
|
# address.
|
|
10.0.0.0/8 logdrop # Reserved (RFC 1918)</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Blacklist File (Partial)</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ADDRESS/SUBNET PROTOCOL PORT
|
|
0.0.0.0/0 udp 1434
|
|
0.0.0.0/0 tcp 1433
|
|
0.0.0.0/0 tcp 8081
|
|
0.0.0.0/0 tcp 57
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Policy File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#SOURCE DESTINATION POLICY LOG LEVEL BURST:LIMIT
|
|
WiFi loc ACCEPT # Allow the wireless new access
|
|
loc net ACCEPT # Allow all net traffic from local net
|
|
$FW loc ACCEPT # Allow local access from the firewall
|
|
$FW tx ACCEPT # Allow firewall access to texas
|
|
loc tx ACCEPT # Allow local net access to texas
|
|
loc fw REJECT $LOG # Reject loc->fw and log
|
|
WiFi net ACCEPT # Allow internet access from wirless
|
|
net all DROP $LOG 10/sec:40 # Rate limit and
|
|
# DROP net->all
|
|
all all REJECT $LOG # Reject and log the rest
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Masq File</title>
|
|
|
|
<blockquote>
|
|
<para>Although most of our internal systems use one-to-one NAT, my
|
|
wife's system (192.168.1.4) uses IP Masquerading (actually SNAT)
|
|
as does my SuSE system (192.168.1.3), our laptop (192.168.3.8) and
|
|
visitors with laptops.</para>
|
|
|
|
<programlisting>#INTERFACE SUBNET ADDRESS
|
|
eth0 eth2 206.124.146.179
|
|
eth0 eth3 206.124.146.179
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
|
|
</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>NAT File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#EXTERNAL INTERFACE INTERNAL ALL INTERFACES LOCAL
|
|
206.124.146.178 eth0:0 192.168.1.5 No No
|
|
206.124.146.180 eth0:2 192.168.1.7 No No
|
|
#
|
|
# The following entry allows the server to be accessed through an address in
|
|
# the local network. This is convenient when I'm on the road and connected
|
|
# to the PPTP server. By doing this, I don't need to set my client's default
|
|
# gateway to route through the tunnel.
|
|
#
|
|
192.168.1.193 eth2:0 206.124.146.177 No No
|
|
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section id="ProxyARP">
|
|
<title>Proxy ARP File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ADDRESS INTERFACE EXTERNAL HAVEROUTE
|
|
206.124.146.177 eth1 eth0 Yes
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Tunnels File (Shell variable TEXAS set in /etc/shorewall/params)</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#TYPE ZONE GATEWAY GATEWAY ZONE PORT
|
|
gre net $TEXAS
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Actions File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ACTION
|
|
Mirrors #Action that accepts traffic from our mirrors
|
|
#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>action.Mirrors File</title>
|
|
|
|
<blockquote>
|
|
<para>The $MIRRORS variable expands to a list of approximately 10 IP
|
|
addresses. So moving these checks into a separate chain reduces the
|
|
number of rules that most net->dmz traffic needs to traverse.</para>
|
|
|
|
<programlisting>#TARGET SOURCE DEST PROTO DEST SOURCE ORIGINAL RATE
|
|
# PORT PORT(S) DEST LIMIT
|
|
ACCEPT $MIRRORS
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Rules File (The shell variables are set in /etc/shorewall/params)</title>
|
|
|
|
<blockquote>
|
|
<programlisting>###############################################################################################################################################################################
|
|
#RESULT CLIENT(S) SERVER(S) PROTO PORT(S) CLIENT ORIGINAL RATE USER
|
|
# PORT(S) DEST:SNAT SET
|
|
###############################################################################################################################################################################
|
|
# Local Network to Internet - Reject attempts by Trojans to call home
|
|
#
|
|
REJECT:$LOG loc net tcp 6667
|
|
#
|
|
# Stop NETBIOS crap since our policy is ACCEPT
|
|
#
|
|
REJECT loc net tcp 137,445
|
|
REJECT loc net udp 137:139
|
|
#
|
|
DROP loc:!192.168.1.0/24 net
|
|
|
|
QUEUE loc net udp
|
|
QUEUE loc fw udp
|
|
QUEUE loc net tcp
|
|
###############################################################################################################################################################################
|
|
# Local Network to Firewall
|
|
#
|
|
DROP loc:!192.168.1.0/24 fw
|
|
ACCEPT loc fw tcp ssh,time,10000,swat,137,139,445
|
|
ACCEPT loc fw udp snmp,ntp,445
|
|
ACCEPT loc fw udp 137:139
|
|
ACCEPT loc fw udp 1024: 137
|
|
###############################################################################################################################################################################
|
|
# Local Network to DMZ
|
|
#
|
|
DROP loc:!192.168.1.0/24 dmz
|
|
REJECT loc dmz tcp 465
|
|
ACCEPT loc dmz udp domain,xdmcp
|
|
ACCEPT loc dmz tcp www,smtp,domain,ssh,imap,https,imaps,cvspserver,ftp,10000,8080,10027,pop3 -
|
|
###############################################################################################################################################################################
|
|
# Internet to DMZ
|
|
#
|
|
DNAT- net dmz:206.124.146.177 tcp smtp - 206.124.146.179,206.124.146.178
|
|
ACCEPT net dmz tcp smtp,www,ftp,imaps,domain,cvspserver,https -
|
|
ACCEPT net dmz udp domain
|
|
ACCEPT net dmz udp 33434:33436
|
|
Mirrors net dmz tcp rsync
|
|
#ACCEPT:$LOG net dmz tcp 32768:61000 20
|
|
###############################################################################################################################################################################
|
|
#
|
|
# Net to Local
|
|
#
|
|
# When I'm "on the road", the following two rules allow me VPN access back home.
|
|
#
|
|
ACCEPT net loc:192.168.1.5 tcp 1723
|
|
ACCEPT net loc:192.168.1.5 gre
|
|
#
|
|
# ICQ
|
|
#
|
|
ACCEPT net loc:192.168.1.5 tcp 4000:4100
|
|
#
|
|
# Real Audio
|
|
#
|
|
ACCEPT net loc:192.168.1.5 udp 6970:7170
|
|
#
|
|
# Overnet
|
|
#
|
|
#ACCEPT net loc:192.168.1.5 tcp 4662
|
|
#ACCEPT net loc:192.168.1.5 udp 12112
|
|
###############################################################################################################################################################################
|
|
# DMZ to Internet
|
|
#
|
|
ACCEPT dmz net tcp smtp,domain,www,https,whois,echo,2702,21,2703,ssh,8080
|
|
ACCEPT dmz net udp domain
|
|
ACCEPT dmz net:$POPSERVERS tcp pop3
|
|
#ACCEPT dmz net:206.191.151.2 tcp pop3
|
|
#ACCEPT dmz net:66.216.26.115 tcp pop3
|
|
#
|
|
# Something is wrong with the FTP connection tracking code or there is some client out there
|
|
# that is sending a PORT command which that code doesn't understand. Either way,
|
|
# the following works around the problem.
|
|
#
|
|
ACCEPT:$LOG dmz net tcp 1024: 20
|
|
###############################################################################################################################################################################
|
|
# DMZ to Firewall -- ntp & snmp, Silently reject Auth
|
|
#
|
|
ACCEPT dmz fw udp ntp ntp
|
|
ACCEPT dmz fw tcp snmp,ssh
|
|
ACCEPT dmz fw udp snmp
|
|
REJECT dmz fw tcp auth
|
|
###############################################################################################################################################################################
|
|
# DMZ to Internet
|
|
#
|
|
ACCEPT dmz net tcp smtp,domain,www,https,whois,echo,2702,21,2703,ssh,8080
|
|
ACCEPT dmz net udp domain
|
|
ACCEPT dmz net:$POPSERVERS tcp pop3
|
|
#ACCEPT dmz net:206.191.151.2 tcp pop3
|
|
#ACCEPT dmz net:66.216.26.115 tcp pop3
|
|
#
|
|
# Something is wrong with the FTP connection tracking code or there is some client out there
|
|
# that is sending a PORT command which that code doesn't understand. Either way,
|
|
# the following works around the problem.
|
|
#
|
|
ACCEPT:$LOG dmz net tcp 1024: 20
|
|
###############################################################################################################################################################################
|
|
# DMZ to Firewall -- ntp & snmp, Silently reject Auth
|
|
#
|
|
ACCEPT dmz fw udp ntp ntp
|
|
ACCEPT dmz fw tcp snmp,ssh
|
|
ACCEPT dmz fw udp snmp
|
|
REJECT dmz fw tcp auth
|
|
###############################################################################################################################################################################
|
|
#
|
|
# DMZ to Local Network
|
|
#
|
|
ACCEPT dmz loc tcp smtp,6001:6010
|
|
ACCEPT dmz loc tcp 111
|
|
ACCEPT dmz loc udp
|
|
###############################################################################################################################################################################
|
|
# Internet to Firewall
|
|
#
|
|
REJECT net fw tcp www
|
|
ACCEPT net dmz udp 33434:33435
|
|
###############################################################################################################################################################################
|
|
# WIFI to Firewall
|
|
#
|
|
ACCEPT WiFi fw tcp ssh,137,139,445
|
|
ACCEPT WiFi fw udp 137:139,445
|
|
ACCEPT WiFi fw udp 1024: 137
|
|
ACCEPT WiFi fw udp ntp ntp
|
|
###############################################################################################################################################################################
|
|
# Firewall to WIFI
|
|
#
|
|
ACCEPT fw WiFi tcp 137,139,445
|
|
ACCEPT fw WiFi udp 137:139,445
|
|
ACCEPT fw WiFi udp 1024: 137
|
|
ACCEPT fw WiFi udp ntp ntp
|
|
##############################################################################################################################################################################
|
|
# WIFI to DMZ
|
|
#
|
|
DNAT- WiFi dmz:206.124.146.177 all - - 192.168.1.193
|
|
ACCEPT WiFi dmz tcp smtp,www,ftp,imaps,domain,https,ssh,8080 -
|
|
ACCEPT WiFi dmz udp domain
|
|
##############################################################################################################################################################################
|
|
# WIFI to loc
|
|
#
|
|
ACCEPT WiFi loc udp 137:139
|
|
ACCEPT WiFi loc tcp 22,80,137,139,445,901,3389
|
|
ACCEPT WiFi loc udp 1024: 137
|
|
ACCEPT WiFi loc udp 177
|
|
##############################################################################################################################################################################
|
|
# loc to WiFi
|
|
#
|
|
ACCEPT loc WiFi udp 137:139
|
|
ACCEPT loc WiFi tcp 137,139,445
|
|
ACCEPT loc WiFi udp 1024: 137
|
|
ACCEPT loc WiFi tcp 6000:6010
|
|
###############################################################################################################################################################################
|
|
# Firewall to Internet
|
|
#
|
|
ACCEPT fw net:$NTPSERVERS udp ntp ntp
|
|
#ACCEPT fw net:$POPSERVERS tcp pop3
|
|
ACCEPT fw net udp domain
|
|
ACCEPT fw net tcp domain,www,https,ssh,1723,whois,1863,ftp,2702,2703,7
|
|
ACCEPT fw net udp 33435:33535
|
|
ACCEPT fw net icmp
|
|
###############################################################################################################################################################################
|
|
# Firewall to DMZ
|
|
#
|
|
ACCEPT fw dmz tcp www,ftp,ssh,smtp
|
|
ACCEPT fw dmz udp domain
|
|
REJECT fw dmz udp 137:139
|
|
###############################################################################################################################################################################
|
|
# Ping
|
|
#
|
|
ACCEPT all all icmp 8
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>/etc/network/interfaces</title>
|
|
|
|
<blockquote>
|
|
<para>This file is Debian specific. My additional entry (which is
|
|
displayed in <emphasis role="bold">bold type</emphasis>) adds a route
|
|
to my DMZ server when eth1 is brought up. It allows me to enter
|
|
<quote>Yes</quote> in the HAVEROUTE column of <link linkend="ProxyARP">my
|
|
Proxy ARP file</link>.</para>
|
|
|
|
<programlisting>...
|
|
auto eth1
|
|
iface eth1 inet static
|
|
address 192.168.2.1
|
|
netmask 255.255.255.0
|
|
network 192.168.2.0
|
|
broadcast 192.168.2.255
|
|
<emphasis role="bold">up ip route add 206.124.146.177 dev eth1
|
|
</emphasis>...</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>/etc/dhcpd.conf (MAC Addresses Omitted)</title>
|
|
|
|
<blockquote>
|
|
<para>While this is a little off-topic, I've included it to show
|
|
how to set up DHCP on two interfaces.<programlisting>default-lease-time 67200; max-lease-time 67200;
|
|
get-lease-hostnames on;
|
|
|
|
group {
|
|
option subnet-mask 255.255.255.0;
|
|
option broadcast-address 192.168.1.255;
|
|
option routers 192.168.1.254;
|
|
option ntp-servers 192.168.1.254;
|
|
option domain-name-servers 192.168.1.193;
|
|
option netbios-name-servers 192.168.1.254;
|
|
option domain-name "shorewall.net";
|
|
option netbios-dd-server 192.168.1.254;
|
|
option netbios-node-type 8;
|
|
option netbios-scope "";
|
|
|
|
subnet 192.168.1.0 netmask 255.255.255.0 {
|
|
range 192.168.1.11 192.168.1.20;
|
|
}
|
|
|
|
host ursa.shorewall.net {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.5;
|
|
}
|
|
|
|
host eastept1 {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.7;
|
|
}
|
|
|
|
host tarry {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.4;
|
|
}
|
|
|
|
host wookie.shorewall.net {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.3;
|
|
}
|
|
|
|
host testws.shorewall.net {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.6;
|
|
}
|
|
|
|
host printer.shorewall.net {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.1.10;
|
|
}
|
|
|
|
}
|
|
|
|
group {
|
|
option subnet-mask 255.255.255.0;
|
|
option broadcast-address 192.168.3.255;
|
|
option routers 192.168.3.254;
|
|
option ntp-servers 192.168.3.254;
|
|
option domain-name-servers 206.124.146.177;
|
|
option netbios-name-servers 192.168.3.254;
|
|
option domain-name "shorewall.net";
|
|
option netbios-dd-server 192.168.3.254;
|
|
option netbios-node-type 8;
|
|
option netbios-scope "";
|
|
|
|
subnet 192.168.3.0 netmask 255.255.255.0 {
|
|
range 192.168.3.11 192.168.3.20;
|
|
}
|
|
|
|
host easteplaptop {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.3.7;
|
|
}
|
|
|
|
host tipper.shorewall.net {
|
|
hardware ethernet …;
|
|
fixed-address 192.168.3.8;
|
|
}</programlisting></para>
|
|
</blockquote>
|
|
</section>
|
|
</section>
|
|
</article> |