forked from extern/shorewall_code
48719a6621
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@182 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
293 lines
12 KiB
HTML
293 lines
12 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
||
<html>
|
||
<head>
|
||
|
||
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
|
||
<title>My Shorewall Configuration</title>
|
||
|
||
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
|
||
|
||
<meta name="ProgId" content="FrontPage.Editor.Document">
|
||
|
||
|
||
<meta name="Microsoft Theme" content="radial 011">
|
||
</head>
|
||
<body background="_themes/radial/radbkgnd.gif" bgcolor="#FFFFFF" text="#000000" link="#6666FF" vlink="#993333" alink="#66CCCC"><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h1 align="center"><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">About My Network<!--mstheme--></font></h1>
|
||
|
||
<blockquote> </blockquote>
|
||
|
||
<h1><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">My Current Network <!--mstheme--></font></h1>
|
||
|
||
<blockquote>
|
||
<p>
|
||
I have DSL service and have 5 static IP addresses (206.124.146.176-180).
|
||
My DSL "modem" (<a href="http://www.fujitsu.com">Fujitsu</a> Speedport) is connected to eth0. I have
|
||
a local network connected to eth2 (subnet 192.168.1.0/24) and a DMZ connected
|
||
to eth1 (192.168.2.0/24). </p>
|
||
<p>
|
||
I use Static NAT for all internal systems (those connected to the switch) except my Wife's system (tarry)
|
||
and the Wireless Access Point (wap) which are
|
||
masqueraded through the primary gateway address (206.124.146.176).</p>
|
||
<p>
|
||
The firewall runs on a 128MB PII/233 with RH7.2 and Kernel 2.4.19.</p>
|
||
<p>
|
||
My personal GNU/Linux System (wookie) is 192.168.1.3 and my personal Windows XP system (ursa)
|
||
is 192.168.1.5. Wookie
|
||
runs Samba and acts as the a WINS server. Wookie is in its own 'whitelist' zone
|
||
called 'me'.</p>
|
||
<p>
|
||
My laptop (eastept1) is connected to eth3 using a cross-over cable. It runs its own <a href="http://www.sygate.com">
|
||
Sygate</a> firewall software and is managed by Proxy ARP.</p>
|
||
<p>
|
||
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). The system also runs fetchmail to fetch our email from our
|
||
old and current ISPs. That server is managed through Proxy ARP.</p>
|
||
<p>
|
||
The firewall system itself runs a DHCP server that serves the local network.</p>
|
||
<p>
|
||
All administration and publishing is done using ssh/scp.</p>
|
||
<p>
|
||
I run an SNMP server on my firewall to serve <a href="http://www.ee.ethz.ch/%7Eoetiker/webtools/mrtg/">
|
||
MRTG</a> running in the DMZ.</p>
|
||
<p align="center">
|
||
<img border="0" src="images/network.jpg" width="493" height="588"></p>
|
||
<p> </p>
|
||
<p>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,
|
||
Shorewall automatically adds a host route to
|
||
206.124.146.177 through eth1 (192.168.2.1) because of
|
||
the entry in /etc/shorewall/proxyarp (see below).</p>
|
||
<p>A similar setup is used on eth3 (192.168.3.1) which
|
||
interfaces to my laptop (206.124.146.180).</p>
|
||
<p><font color="#ff0000" size="5">
|
||
Note: My files use features not available before
|
||
Shorewall version 1.3.4.</font></p>
|
||
</blockquote>
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Shorewall.conf<!--mstheme--></font></h3>
|
||
|
||
<!--mstheme--></font><pre> SUBSYSLOCK=/var/lock/subsys/shorewall
|
||
STATEDIR=/var/state/shorewall
|
||
|
||
LOGRATE=
|
||
LOGBURST=
|
||
|
||
ADD_IP_ALIASES="Yes"
|
||
|
||
CLAMPMSS=Yes
|
||
|
||
MULTIPORT=Yes</pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Zones File:<!--mstheme--></font></h3>
|
||
<!--mstheme--></font><pre><font face="Courier" size="2"> #ZONE DISPLAY COMMENTS
|
||
net Internet Internet
|
||
me Eastep My Workstation
|
||
loc Local Local networks
|
||
dmz DMZ Demilitarized zone
|
||
tx Texas Peer Network in Dallas Texas
|
||
#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Interfaces File: <!--mstheme--></font></h3>
|
||
|
||
<blockquote>
|
||
<p>
|
||
This is set up so that I can start the firewall before bringing up my Ethernet
|
||
interfaces. </p>
|
||
|
||
</blockquote>
|
||
|
||
<!--mstheme--></font><pre><font face="Courier" size="2"> #ZONE INTERFACE BROADCAST OPTIONS
|
||
net eth0 206.124.146.255 routefilter,norfc1918,blacklist,filterping
|
||
- eth2 192.168.1.255 dhcp
|
||
dmz eth1 206.124.146.255 -
|
||
loc eth3 206.124.146.255 -
|
||
tx texas -
|
||
loc ppp+
|
||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Hosts File: <!--mstheme--></font></h3>
|
||
|
||
<!--mstheme--></font><pre><font face="Courier" size="2"> #ZONE HOST(S) OPTIONS
|
||
me eth2:192.168.1.3
|
||
loc eth2:0.0.0.0/0
|
||
loc ppp+:192.168.1.0/24
|
||
loc eth3:206.124.146.180
|
||
tx texas:192.168.9.0/24
|
||
#LAST LINE -- ADD YOUR ENTRIES ABOVE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Routestopped File:<!--mstheme--></font></h3>
|
||
|
||
<!--mstheme--></font><pre> #INTERFACE HOST(S)
|
||
eth1 206.124.146.177
|
||
eth2 -
|
||
eth3 206.124.146.180</pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Common File: <!--mstheme--></font></h3>
|
||
<!--mstheme--></font><pre><font size="2" face="Courier"> . /etc/shorewall/common.def
|
||
run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP
|
||
run_iptables -A common -p tcp --dport 113 -j REJECT</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Policy File:<!--mstheme--></font></h3>
|
||
|
||
<!--mstheme--></font><pre><font size="2" face="Courier">
|
||
#SOURCE DEST POLICY LOG LEVEL LIMIT:BURST
|
||
me all ACCEPT
|
||
tx me ACCEPT #Give Texas access to my personal system
|
||
all me CONTINUE #<font color="#FF0000">WARNING: You must be running Shorewall 1.3.1 or later for
|
||
</font>#<font color="#FF0000"> this policy to work as expected!!!</font>
|
||
loc loc ACCEPT
|
||
loc net ACCEPT
|
||
$FW loc ACCEPT
|
||
$FW tx ACCEPT
|
||
loc tx ACCEPT
|
||
loc fw REJECT
|
||
net all DROP info 10/sec:40
|
||
all all REJECT info
|
||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOTE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Masq File: <!--mstheme--></font></h3>
|
||
|
||
<blockquote>
|
||
<p>
|
||
Although most of our internal systems use static NAT, my wife's system
|
||
(192.168.1.4) uses IP Masquerading (actually SNAT) as do visitors with laptops.</p>
|
||
</blockquote>
|
||
|
||
<!--mstheme--></font><pre><font size="2" face="Courier"> #INTERFACE SUBNET ADDRESS
|
||
eth0 192.168.1.0/24 206.124.146.176
|
||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">NAT File: <!--mstheme--></font></h3>
|
||
<!--mstheme--></font><pre><font size="2" face="Courier"> #EXTERNAL INTERFACE INTERNAL ALL LOCAL
|
||
206.124.146.178 eth0 192.168.1.5 No No
|
||
206.124.146.179 eth0 192.168.1.3 No No
|
||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Proxy ARP File:<!--mstheme--></font></h3>
|
||
<!--mstheme--></font><pre><font face="Courier" size="2"> #ADDRESS INTERFACE EXTERNAL HAVEROUTE
|
||
206.124.146.177 eth1 eth0 No
|
||
206.124.146.180 eth3 eth0 No
|
||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
|
||
<h3><!--mstheme--><font face="times new roman, Times New Roman, Times" color="#666666">Rules File (The shell variables
|
||
are set in /etc/shorewall/params):<!--mstheme--></font></h3>
|
||
|
||
<!--mstheme--></font><pre><font face="Courier" size="2"> #ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL
|
||
# PORT(S) PORT(S) PORT(S) DEST
|
||
#
|
||
# Local Network to Internet - Reject attempts by Trojans to call home
|
||
#
|
||
REJECT:info loc net tcp 6667
|
||
#
|
||
# Local Network to Firewall
|
||
#
|
||
ACCEPT loc fw tcp ssh
|
||
ACCEPT loc fw tcp time
|
||
#
|
||
# Local Network to DMZ
|
||
#
|
||
ACCEPT loc dmz udp domain
|
||
ACCEPT loc dmz tcp smtp
|
||
ACCEPT loc dmz tcp domain
|
||
ACCEPT loc dmz tcp ssh
|
||
ACCEPT loc dmz tcp auth
|
||
ACCEPT loc dmz tcp imap
|
||
ACCEPT loc dmz tcp https
|
||
ACCEPT loc dmz tcp imaps
|
||
ACCEPT loc dmz tcp cvspserver
|
||
ACCEPT loc dmz tcp www
|
||
ACCEPT loc dmz tcp ftp
|
||
ACCEPT loc dmz tcp pop3
|
||
ACCEPT loc dmz icmp echo-request
|
||
#
|
||
# Internet to DMZ
|
||
#
|
||
ACCEPT net dmz tcp www
|
||
ACCEPT net dmz tcp smtp
|
||
ACCEPT net dmz tcp ftp
|
||
ACCEPT net dmz tcp auth
|
||
ACCEPT net dmz tcp https
|
||
ACCEPT net dmz tcp imaps
|
||
ACCEPT net dmz tcp domain
|
||
ACCEPT net dmz tcp cvspserver
|
||
ACCEPT net dmz udp domain
|
||
ACCEPT net dmz icmp echo-request
|
||
ACCEPT net:$MIRRORS dmz tcp rsync
|
||
#
|
||
# Net to Me (ICQ chat and file transfers)
|
||
#
|
||
ACCEPT net me tcp 4000:4100
|
||
#
|
||
# Net to Local
|
||
#
|
||
ACCEPT net loc:206.124.146.180 #Runs its own firewall software
|
||
ACCEPT net loc tcp auth
|
||
REJECT net loc tcp www
|
||
#
|
||
# DMZ to Internet
|
||
#
|
||
ACCEPT dmz net icmp echo-request
|
||
ACCEPT dmz net tcp smtp
|
||
ACCEPT dmz net tcp auth
|
||
ACCEPT dmz net tcp domain
|
||
ACCEPT dmz net tcp www
|
||
ACCEPT dmz net tcp https
|
||
ACCEPT dmz net tcp whois
|
||
ACCEPT dmz net tcp echo
|
||
ACCEPT dmz net udp domain
|
||
ACCEPT dmz net:$NTPSERVERS udp ntp
|
||
ACCEPT dmz net:$POPSERVERS tcp pop3
|
||
#
|
||
# The following compensates for a bug, either in some FTP clients or in the
|
||
# Netfilter connection tracking code that occasionally denies active mode
|
||
# FTP clients
|
||
#
|
||
ACCEPT:info dmz net tcp 1024: 20
|
||
#
|
||
# DMZ to Firewall -- snmp
|
||
#
|
||
ACCEPT dmz fw tcp snmp
|
||
ACCEPT dmz fw udp snmp
|
||
#
|
||
# DMZ to Local Network
|
||
#
|
||
ACCEPT dmz loc tcp smtp
|
||
ACCEPT dmz loc tcp auth
|
||
ACCEPT dmz loc icmp echo-request
|
||
# Internet to Firewall
|
||
#
|
||
ACCEPT net fw tcp 1723
|
||
ACCEPT net fw gre
|
||
REJECT net fw tcp www
|
||
#
|
||
# Firewall to Internet
|
||
#
|
||
ACCEPT fw net:$NTPSERVERS udp ntp
|
||
ACCEPT fw net udp domain
|
||
ACCEPT fw net tcp domain
|
||
ACCEPT fw net tcp www
|
||
ACCEPT fw net tcp https
|
||
ACCEPT fw net tcp ssh
|
||
ACCEPT fw net tcp whois
|
||
ACCEPT fw net icmp echo-request
|
||
#
|
||
# Firewall to DMZ
|
||
#
|
||
ACCEPT fw dmz tcp www
|
||
ACCEPT fw dmz tcp ftp
|
||
ACCEPT fw dmz tcp ssh
|
||
ACCEPT fw dmz tcp smtp
|
||
ACCEPT fw dmz udp domain
|
||
#
|
||
# Let Texas Ping
|
||
#
|
||
ACCEPT tx fw icmp echo-request
|
||
ACCEPT tx loc icmp echo-request
|
||
|
||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre><!--mstheme--><font face="arial, Arial, Helvetica">
|
||
|
||
<p><font size="2">
|
||
Last updated 8/4/2002
|
||
- </font><font size="2">
|
||
<a href="support.htm">Tom Eastep</a></font>
|
||
</p>
|
||
<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
|
||
© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><!--mstheme--></font></body></html> |