mirror of
https://gitlab.com/shorewall/code.git
synced 2024-12-15 10:51:02 +01:00
0b37368536
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@983 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
619 lines
28 KiB
XML
619 lines
28 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>2003-12-06</pubdate>
|
|
|
|
<copyright>
|
|
<year>2001-2003</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 "modem" (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 XP System that dual-boots Mandrake
|
|
9.2) - 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). 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 Linux system
|
|
(Wookie), my Wife's system (Tarry), and our  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 RH9.0.</para>
|
|
|
|
<para>Wookie and the Firewall both run Samba and the Firewall acts as a
|
|
WINS server.</para>
|
|
|
|
<para>Wookie is in its own 'whitelist' zone called 'me'
|
|
which is embedded in the local zone.</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 "hot spot", 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). 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 X
|
|
installed on the firewall but no X server or desktop is installed. X
|
|
applications tunnel through SSH to XWin.exe running on Ursa. The server
|
|
does have 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, my /sbin/ifup-local script
|
|
(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=No
|
|
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>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</para>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Zones File</title>
|
|
|
|
<blockquote>
|
|
<programlisting>#ZONE DISPLAY COMMENTS
|
|
net Internet Internet
|
|
WiFi Wireless Wireless Network on eth3
|
|
me Wookie My Linux Workstation
|
|
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,newnotsyn
|
|
dmz eth1 192.168.2.255 newnotsyn
|
|
WiFi eth3 192.168.3.255 dhcp,maclist,newnotsyn
|
|
- 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
|
|
me              eth2:192.168.1.3
|
|
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>
|
|
<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
|
|
me loc NONE # 'me' and 'loc' are in the same network
|
|
me all ACCEPT # Allow my workstation unlimited access
|
|
tx me ACCEPT # Alow Texas access to my workstation
|
|
WiFi loc ACCEPT # Allow the wireless new access
|
|
all me CONTINUE # Use all->loc rules for my WS also
|
|
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 personal 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>
|
|
<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 $MIRRORS
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Rules File (The shell variables are set in /etc/shorewall/params)</title>
|
|
|
|
<blockquote>
|
|
<programlisting>################################################################################################################################################################
|
|
#RESULT CLIENT(S) SERVER(S) PROTO PORT(S) CLIENT ORIGINAL DEST:SNAT
|
|
################################################################################################################################################################
|
|
# Local Network to Internet - Reject attempts by Trojans to call home
|
|
#
|
|
REJECT:$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
|
|
################################################################################################################################################################
|
|
# 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
|
|
#
|
|
ACCEPT loc dmz udp domain,xdmcp
|
|
ACCEPT loc dmz tcp www,smtp,domain,ssh,imap,https,imaps,cvspserver,ftp,10000,8080,pop3 -
|
|
################################################################################################################################################################
|
|
# Me to DMZ (This compensates for the broken RH kernel running in the DMZ -- that kernel's REJECT target is broken and Evolution requires a REJECT from smtps).
|
|
#
|
|
REJECT me dmz tcp 465
|
|
################################################################################################################################################################
|
|
# Internet to DMZ
|
|
#
|
|
ACCEPT net dmz tcp smtp,www,ftp,imaps,domain,cvspserver,https -
|
|
ACCEPT net dmz udp domain
|
|
Mirrors net dmz tcp rsync
|
|
################################################################################################################################################################
|
|
#
|
|
# 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
|
|
DNAT net loc:192.168.1.3 udp 6970:7170 - 206.124.146.179
|
|
################################################################################################################################################################
|
|
# Net to me
|
|
#
|
|
ACCEPT net loc:192.168.1.3 tcp 4000:4100
|
|
################################################################################################################################################################
|
|
# DMZ to Internet
|
|
#
|
|
ACCEPT dmz net tcp smtp,domain,www,https,whois,echo,2702,21,2703,ssh
|
|
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
|
|
################################################################################################################################################################
|
|
#
|
|
# DMZ to Me -- NFS
|
|
#
|
|
ACCEPT dmz me tcp 111
|
|
ACCEPT dmz me udp 111
|
|
ACCEPT dmz me udp 2049
|
|
ACCEPT dmz me udp 32700:
|
|
################################################################################################################################################################
|
|
# Internet to Firewall
|
|
#
|
|
REJECT net fw tcp www
|
|
DROP net fw tcp 1433
|
|
################################################################################################################################################################
|
|
# WiFi to Firewall (SMB and NTP)
|
|
#
|
|
ACCEPT WiFi fw tcp ssh,137,139,445
|
|
ACCEPT WiFi fw udp 137:139,445
|
|
ACCEPT
|
|
###############################################################################################################################################################
|
|
# WIFI to loc
|
|
#
|
|
ACCEPT WiFi loc udp 137:139
|
|
ACCEPT WiFi loc tcp 22,80,137,139,445,3389
|
|
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
|
|
WiFi fw udp 1024: 137
|
|
ACCEPT WiFi fw udp ntp ntp
|
|
################################################################################################################################################################
|
|
# Firewall to WiFi (SMB)
|
|
#
|
|
ACCEPT fw WiFi tcp 137,139,445
|
|
ACCEPT fw WiFi udp 137:139,445
|
|
ACCEPT fw WiFi udp 1024: 137
|
|
###############################################################################################################################################################
|
|
# 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 -
|
|
ACCEPT WiFi dmz udp domain
|
|
################################################################################################################################################################
|
|
# 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 8
|
|
################################################################################################################################################################
|
|
# Firewall to DMZ
|
|
#
|
|
ACCEPT fw dmz tcp www,ftp,ssh,smtp
|
|
ACCEPT fw dmz udp domain
|
|
ACCEPT fw dmz icmp 8
|
|
REJECT fw dmz udp 137:139
|
|
|
|
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Tcrules File</title>
|
|
|
|
<para>This file deals with redirecting html requests to Squid on the DMZ
|
|
server.</para>
|
|
|
|
<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>Init File</title>
|
|
|
|
<para>This file deals with redirecting html requests to Squid on the DMZ
|
|
server.</para>
|
|
|
|
<blockquote>
|
|
<programlisting>#
|
|
# Add a second routing table with my server as the default gateway
|
|
# Use this routing table with all packets marked with value 1
|
|
#
|
|
if [ -z "`ip route list table 202 2> /dev/null`" ] ; then
|
|
run_ip rule add fwmark 1 table www.out
|
|
run_ip route add default via 206.124.146.177 dev eth1 table www.out
|
|
run_ip route flush cache
|
|
fi</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>/etc/iproute2/rt_tables</title>
|
|
|
|
<para>This file deals with redirecting html requests to Squid on the DMZ
|
|
server.</para>
|
|
|
|
<blockquote>
|
|
<programlisting>#
|
|
# reserved values
|
|
#
|
|
#255 local
|
|
#254 main
|
|
#253 default
|
|
#0 unspec
|
|
|
|
#
|
|
# local -- I added the entry below
|
|
#
|
|
202 www.out</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Tcrules File</title>
|
|
|
|
<para>This file deals with redirecting html requests to Squid on the DMZ
|
|
server.</para>
|
|
|
|
<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>Tcstart File</title>
|
|
|
|
<para>My tcstart file is just the HTB version of WonderShaper.</para>
|
|
</section>
|
|
|
|
<section>
|
|
<title>Newnotsyn file (/etc/shorewall/newnotsyn):</title>
|
|
|
|
<blockquote>
|
|
<para>I prefer to allow SYN, FIN and RST packets unconditionally
|
|
rather than just on 'newnotsyn' interfaces as is the case with
|
|
the standard Shorewall ruleset. This file deletes the
|
|
Shorewall-generated rules for these packets and creates my own.</para>
|
|
|
|
<programlisting>#!/bin/sh
|
|
|
|
for interface in `find_interfaces_by_option newnotsyn`; do
|
|
run_iptables -D newnotsyn -i $interface -p tcp --tcp-flags ACK ACK -j ACCEPT
|
|
run_iptables -D newnotsyn -i $interface -p tcp --tcp-flags RST RST -j ACCEPT
|
|
run_iptables -D newnotsyn -i $interface -p tcp --tcp-flags FIN FIN -j ACCEPT
|
|
done
|
|
|
|
run_iptables -A newnotsyn -p tcp --tcp-flags ACK ACK -j ACCEPT
|
|
run_iptables -A newnotsyn -p tcp --tcp-flags RST RST -j ACCEPT
|
|
run_iptables -A newnotsyn -p tcp --tcp-flags FIN FIN -j ACCEPT</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
|
|
<section>
|
|
<title>/sbin/ifup-local</title>
|
|
|
|
<blockquote>
|
|
<para>This file is Redhat specific and adds a route to my DMZ server
|
|
when eth1 is brought up. It allows me to enter "Yes" in the
|
|
HAVEROUTE column of my Proxy ARP file.</para>
|
|
|
|
<programlisting>#!/bin/sh
|
|
|
|
case $1 in
|
|
eth1)
|
|
ip route add 206.124.146.177 dev eth1
|
|
;;
|
|
esac</programlisting>
|
|
</blockquote>
|
|
</section>
|
|
</section>
|
|
</article> |