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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@319 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
176 lines
12 KiB
HTML
176 lines
12 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text/html; charset=windows-1252">
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<title>My Shorewall Configuration</title>
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<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
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<meta name="ProgId" content="FrontPage.Editor.Document">
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<meta name="Microsoft Theme" content="none">
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</head>
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<body>
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<table border="0" cellpadding="0" cellspacing="0"
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style="border-collapse: collapse;" width="100%" id="AutoNumber1"
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bgcolor="#400169" height="90">
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<tbody>
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<tr>
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<td width="100%">
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<h1 align="center"><font color="#ffffff">About My Network</font></h1>
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</td>
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</tr>
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</tbody>
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</table>
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<blockquote> </blockquote>
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<h1>My Current Network </h1>
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<blockquote>
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<p> I have DSL service and have 5 static IP addresses (206.124.146.176-180).
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My DSL "modem" (<a href="http://www.fujitsu.com">Fujitsu</a> Speedport)
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is connected to eth0. I have a local network connected to eth2 (subnet
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192.168.1.0/24) and a DMZ connected to eth1 (192.168.2.0/24). </p>
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<p> I use:<br>
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</p>
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<ul>
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<li>Static NAT for ursa (my XP System) - Internal address 192.168.1.5
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and external address 206.124.146.178.</li>
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<li>Proxy ARP for wookie (my Linux System). This system has two IP
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addresses: 192.168.1.3/24 and 206.124.146.179/24.</li>
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<li>SNAT through the primary gateway address (206.124.146.176) for
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my Wife's system (tarry) and the Wireless Access Point (wap)</li>
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</ul>
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<p> The firewall runs on a 128MB PII/233 with RH7.2 and Kernel 2.4.20-pre6.</p>
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<p> Wookie runs Samba and acts as the a WINS server. Wookie is in its
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own 'whitelist' zone called 'me'.</p>
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<p> My laptop (eastept1) is connected to eth3 using a cross-over cable.
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It runs its own <a href="http://www.sygate.com"> Sygate</a> firewall software
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and is managed by Proxy ARP. It connects to the local network through
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the PopTop server running on my firewall. </p>
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<p> The single system in the DMZ (address 206.124.146.177) runs postfix,
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Courier IMAP (imaps and pop3), DNS, a Web server (Apache) and an FTP server
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(Pure-ftpd). The system also runs fetchmail to fetch our email from our
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old and current ISPs. That server is managed through Proxy ARP.</p>
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<p> The firewall system itself runs a DHCP server that serves the local
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network.</p>
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<p> All administration and publishing is done using ssh/scp.</p>
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<p> I run an SNMP server on my firewall to serve <a
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href="http://www.ee.ethz.ch/%7Eoetiker/webtools/mrtg/"> MRTG</a> running
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in the DMZ.</p>
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<p align="center"> <img border="0"
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src="images/network.png" width="764" height="846">
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</p>
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<p> </p>
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<p>The ethernet interface in the Server is configured
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with IP address 206.124.146.177, netmask
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255.255.255.0. The server's default gateway is
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206.124.146.254 (Router at my ISP. This is the same
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default gateway used by the firewall itself). On the firewall,
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Shorewall automatically adds a host route to
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206.124.146.177 through eth1 (192.168.2.1) because
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of the entry in /etc/shorewall/proxyarp (see
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below).</p>
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<p>A similar setup is used on eth3 (192.168.3.1) which
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interfaces to my laptop (206.124.146.180).</p>
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<p><font color="#ff0000" size="5"> Note: My files
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use features not available before Shorewall
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version 1.3.4.</font></p>
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</blockquote>
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<h3>Shorewall.conf</h3>
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<pre> SUBSYSLOCK=/var/lock/subsys/shorewall<br> STATEDIR=/var/state/shorewall<br><br> LOGRATE=<br> LOGBURST=<br><br> ADD_IP_ALIASES="Yes"<br><br> CLAMPMSS=Yes<br><br> MULTIPORT=Yes</pre>
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<h3>Zones File:</h3>
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<pre><font face="Courier" size="2"> #ZONE DISPLAY COMMENTS<br> net Internet Internet<br> me Eastep My Workstation<br> loc Local Local networks<br> dmz DMZ Demilitarized zone<br> tx Texas Peer Network in Dallas Texas<br> #LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</font></pre>
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<h3>Interfaces File: </h3>
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<blockquote>
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<p> This is set up so that I can start the firewall before bringing up
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my Ethernet interfaces. </p>
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</blockquote>
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<pre><font face="Courier" size="2"> #ZONE INTERFACE BROADCAST OPTIONS<br> net eth0 206.124.146.255 routefilter,norfc1918,blacklist,filterping<br> loc eth2 192.168.1.255 dhcp,filterping,maclist<br> dmz eth1 206.124.146.255 filterping<br> net eth3 206.124.146.255 filterping,blacklist<br> - texas - filterping<br> loc ppp+ - filterping<br> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
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<h3>Hosts File: </h3>
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<pre><font face="Courier" size="2"> #ZONE HOST(S) OPTIONS<br> me eth2:192.168.1.3,eth2:206.124.146.179<br> tx texas:192.168.9.0/24<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE -- DO NOT REMOVE</font></pre>
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<h3>Routestopped File:</h3>
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<pre><font face="Courier" size="2"> #INTERFACE HOST(S)<br> eth1 206.124.146.177<br> eth2 -<br> eth3 206.124.146.180</font></pre>
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<h3>Common File: </h3>
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<pre><font size="2" face="Courier"> . /etc/shorewall/common.def<br> run_iptables -A common -p udp --sport 53 -mstate --state NEW -j DROP<br> run_iptables -A common -p tcp --dport 113 -j REJECT</font></pre>
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<h3>Policy File:</h3>
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<pre><font size="2" face="Courier">
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#SOURCE DEST POLICY LOG LEVEL LIMIT:BURST
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me all ACCEPT
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tx me ACCEPT #Give Texas access to my personal system
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all me CONTINUE #<font
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color="#ff0000">WARNING: You must be running Shorewall 1.3.1 or later for<br> </font>#<font
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color="#ff0000"> this policy to work as expected!!!</font> <br> loc loc ACCEPT<br> loc net ACCEPT<br> $FW loc ACCEPT<br> $FW tx ACCEPT<br> loc tx ACCEPT<br> loc fw REJECT<br> net net ACCEPT<br> net all DROP info 10/sec:40<br> all all REJECT info<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOTE</font></pre>
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<h3>Masq File: </h3>
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<blockquote>
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<p> Although most of our internal systems use static NAT, my wife's system
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(192.168.1.4) uses IP Masquerading (actually SNAT) as do visitors with
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laptops. Also, I masquerade wookie to the peer subnet in Texas.</p>
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</blockquote>
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<pre><font size="2" face="Courier"> #INTERFACE SUBNET ADDRESS<br> eth0 192.168.1.0/24 206.124.146.176<br> texas 206.124.146.179 192.168.1.254<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre>
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<h3>NAT File: </h3>
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<pre><font size="2" face="Courier"> #EXTERNAL INTERFACE INTERNAL ALL LOCAL<br> 206.124.146.178 eth0 192.168.1.5 No No<br> 206.124.146.179 eth0 192.168.1.3 No No<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</font></pre>
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<h3>Proxy ARP File:</h3>
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<pre><font face="Courier" size="2"> #ADDRESS INTERFACE EXTERNAL HAVEROU</font><font
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face="Courier" size="2">TE<br> 206.124.146.177 eth1 eth0 No<br> 206.124.146.180 eth3 eth0 No<br></font><font
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face="Courier" size="2"> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
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<h3>Rules File (The shell variables
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are set in /etc/shorewall/params):</h3>
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<pre><font face="Courier" size="2"> #ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL<br> # PORT(S) PORT(S) PORT(S) DEST<br> #<br> # Local Network to Internet - Reject attempts by Trojans to call home<br> #<br> REJECT:info loc net tcp 6667<br> #<br> # Local Network to Firewall <br> #<br> ACCEPT loc fw tcp ssh<br> ACCEPT loc fw tcp time<br> #<br> # Local Network to DMZ <br> #<br> ACCEPT loc dmz udp domain<br> ACCEPT loc dmz tcp smtp<br> ACCEPT loc dmz tcp domain<br> ACCEPT loc dmz tcp ssh<br> ACCEPT loc dmz tcp auth<br> ACCEPT loc dmz tcp imap<br> ACCEPT loc dmz tcp https<br> ACCEPT loc dmz tcp imaps<br> ACCEPT loc dmz tcp cvspserver<br> ACCEPT loc dmz tcp www<br> ACCEPT loc dmz tcp ftp<br> ACCEPT loc dmz tcp pop3<br> ACCEPT loc dmz icmp echo-request<br> #<br> # Internet to DMZ <br> #<br> ACCEPT net dmz tcp www<br> ACCEPT net dmz tcp smtp<br> ACCEPT net dmz tcp ftp<br> ACCEPT net dmz tcp auth<br> ACCEPT net dmz tcp https<br> ACCEPT net dmz tcp imaps<br> ACCEPT net dmz tcp domain<br> ACCEPT net dmz tcp cvspserver<br> ACCEPT net dmz udp domain<br> ACCEPT net dmz icmp echo-request<br> ACCEPT net:$MIRRORS dmz tcp rsync<br> #<br> # Net to Me (ICQ chat and file transfers) <br> #<br> ACCEPT net me tcp 4000:4100<br> #<br> # Net to Local <br> #<br> ACCEPT net loc tcp auth<br> REJECT net loc tcp www<br> #<br> # DMZ to Internet<br> #<br> ACCEPT dmz net icmp echo-request<br> ACCEPT dmz net tcp smtp<br> ACCEPT dmz net tcp auth<br> ACCEPT dmz net tcp domain<br> ACCEPT dmz net tcp www<br> ACCEPT dmz net tcp https<br> ACCEPT dmz net tcp whois<br> ACCEPT dmz net tcp echo<br> ACCEPT dmz net udp domain<br> ACCEPT dmz net:$NTPSERVERS udp ntp<br> ACCEPT dmz net:$POPSERVERS tcp pop3<br> #<br> # The following compensates for a bug, either in some FTP clients or in the<br> # Netfilter connection tracking code that occasionally denies active mode<br> # FTP clients<br> #<br> ACCEPT:info dmz net tcp 1024: 20<br> #<br> # DMZ to Firewall -- snmp<br> #<br> ACCEPT dmz fw tcp snmp<br> ACCEPT dmz fw udp snmp<br> #<br> # DMZ to Local Network <br> #<br> ACCEPT dmz loc tcp smtp<br> ACCEPT dmz loc tcp auth<br> ACCEPT dmz loc icmp echo-request<br> # Internet to Firewall<br> #<br> ACCEPT net fw tcp 1723<br> ACCEPT net fw gre<br> REJECT net fw tcp www<br> #<br> # Firewall to Internet<br> #<br> ACCEPT fw net:$NTPSERVERS udp ntp<br> ACCEPT fw net udp domain<br> ACCEPT fw net tcp domain<br> ACCEPT fw net tcp www<br> ACCEPT fw net tcp https<br> ACCEPT fw net tcp ssh<br> ACCEPT fw net tcp whois<br> ACCEPT fw net icmp echo-request<br> #<br> # Firewall to DMZ<br> #<br> ACCEPT fw dmz tcp www<br> ACCEPT fw dmz tcp ftp<br> ACCEPT fw dmz tcp ssh<br> ACCEPT fw dmz tcp smtp<br> ACCEPT fw dmz udp domain<br> #<br> # Let Texas Ping<br> #<br> ACCEPT tx fw icmp echo-request<br> ACCEPT tx loc icmp echo-request<br><br> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</font></pre>
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<p><font size="2"> Last updated 10/14/2002 - </font><font size="2">
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<a href="support.htm">Tom Eastep</a></font>
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</p>
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<font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font>
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© <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font><br>
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<br>
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<br>
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<br>
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<br>
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</body>
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</html>
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