mirror of
https://gitlab.com/shorewall/code.git
synced 2024-12-31 10:38:55 +01:00
Update my config doc for IPSEC
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@1690 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
e50eada4cf
commit
10fc89855d
@ -17,7 +17,7 @@
|
||||
</author>
|
||||
</authorgroup>
|
||||
|
||||
<pubdate>2004-10-01</pubdate>
|
||||
<pubdate>2004-10-12</pubdate>
|
||||
|
||||
<copyright>
|
||||
<year>2001-2004</year>
|
||||
@ -622,6 +622,36 @@ to debug/develop the newnat interface.</programlisting></para>
|
||||
url="SimpleBridge.html">Shorewall Simple Bridge
|
||||
documentation</ulink>.</para>
|
||||
</section>
|
||||
|
||||
<section id="faq40">
|
||||
<title>(FAQ 40) Shorewall is Blocking my OpenVPN Tunnel</title>
|
||||
|
||||
<para>I have this entry in <ulink
|
||||
url="Documentation.htm#Tunnels">/etc/shorewall/tunnels</ulink>:</para>
|
||||
|
||||
<programlisting># TYPE ZONE GATEWAY GATEWAY
|
||||
# ZONE
|
||||
openvpn:5000 net 69.145.71.133</programlisting>
|
||||
|
||||
<para>Yet I am seeing this log message:</para>
|
||||
|
||||
<programlisting>Oct 12 13:41:03 localhost kernel: Shorewall:net2all:DROP:IN=eth0 OUT=
|
||||
MAC=00:04:5a:7f:92:9f:00:b0:c2:89:68:e4:08:00 SRC=69.145.71.133
|
||||
DST=216.187.138.18 LEN=42 TOS=0x00 PREC=0x00 TTL=46 ID=11 DF PROTO=UDP
|
||||
SPT=33120 DPT=5000 LEN=22</programlisting>
|
||||
|
||||
<para><emphasis role="bold">Answer</emphasis>: Shorewall's <emphasis
|
||||
role="bold">openvpn</emphasis> tunnel type assumes that OpenVPN will be
|
||||
using the same port (default 5000) for both the source and destination
|
||||
port. From the above message, it is clear that the remote client is
|
||||
using source port 33120. The solution is to replace your <ulink
|
||||
url="Documentation.htm#Tunnels">/etc/shorewall/tunnels</ulink> entry
|
||||
with this one:</para>
|
||||
|
||||
<programlisting># TYPE ZONE GATEWAY GATEWAY
|
||||
# ZONE
|
||||
generic:udp:5000 net 69.145.71.133</programlisting>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
@ -638,7 +668,7 @@ to debug/develop the newnat interface.</programlisting></para>
|
||||
<quote>man syslog</quote>) in your <ulink
|
||||
url="Documentation.htm#Policy">policies</ulink> and <ulink
|
||||
url="Documentation.htm#Rules">rules</ulink>. The destination for
|
||||
messaged logged by syslog is controlled by
|
||||
messages logged by syslog is controlled by
|
||||
<filename>/etc/syslog.conf</filename> (see <quote>man
|
||||
syslog.conf</quote>). When you have changed /etc/syslog.conf, be sure to
|
||||
restart syslogd (on a RedHat system, <quote>service syslog
|
||||
@ -1887,6 +1917,16 @@ REJECT fw net:216.239.39.99 all</programlisting>Given that
|
||||
<title>Revision History</title>
|
||||
|
||||
<para><revhistory>
|
||||
<revision>
|
||||
<revnumber>1.34</revnumber>
|
||||
|
||||
<date>2004-10-12</date>
|
||||
|
||||
<authorinitials>TE</authorinitials>
|
||||
|
||||
<revremark>Add FAQ 40.</revremark>
|
||||
</revision>
|
||||
|
||||
<revision>
|
||||
<revnumber>1.33</revnumber>
|
||||
|
||||
|
||||
@ -382,16 +382,6 @@ sainfo address 192.168.1.0/24 any address 134.28.54.2/32 any
|
||||
compression_algorithm deflate ;
|
||||
}</programlisting>
|
||||
</blockquote>
|
||||
|
||||
<para>The <filename>/etc/racoon/psk.txt file</filename> on gateway
|
||||
A:</para>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>134.28.54.2 <the key></programlisting>
|
||||
</blockquote>
|
||||
|
||||
<para>Note that the <emphasis role="bold">same key </emphasis>must be used
|
||||
in both directions.</para>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
@ -518,6 +508,9 @@ spdadd 192.168.20.40/32 192.168.20.10/32 any -P in ipsec esp/transport/192.168.
|
||||
<programlisting>192.168.20.20 <key for 192.168.20.10<->192.168.20.20>
|
||||
192.168.20.30 <key for 192.168.20.10<->192.168.20.30>
|
||||
192.168.20.40 <key for 192.168.20.10<->192.168.20.40></programlisting>
|
||||
|
||||
<para>Note that the <emphasis role="bold">same key</emphasis>must be
|
||||
used in both directions.</para>
|
||||
</blockquote>
|
||||
|
||||
<para>Shorewall configuration goes as follows:</para>
|
||||
|
||||
@ -21,7 +21,7 @@
|
||||
</author>
|
||||
</authorgroup>
|
||||
|
||||
<pubdate>2004-09-29</pubdate>
|
||||
<pubdate>2004-10-12</pubdate>
|
||||
|
||||
<copyright>
|
||||
<year>2003</year>
|
||||
@ -104,8 +104,10 @@ openvpn net 134.28.54.2</programlisting>
|
||||
<note>
|
||||
<para>Some OpenVPN clients (notabley on <trademark>Windows</trademark>)
|
||||
do not use the same source and destination ports which can cause
|
||||
problems. If system B is a Windows system, then you will want the
|
||||
following entry in /etc/shorewall/tunnels instead of the one
|
||||
problems. If system B is a Windows system or if you find that Shorewall
|
||||
is blocking the UDP port 5000 traffic from the remote gateway, then you
|
||||
will want the following entry in
|
||||
<filename>/etc/shorewall/tunnels</filename> instead of the one
|
||||
above:</para>
|
||||
|
||||
<programlisting>#TYPE ZONE GATEWAY GATEWAY ZONE
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
</author>
|
||||
</authorgroup>
|
||||
|
||||
<pubdate>2004-10-04</pubdate>
|
||||
<pubdate>2004-10-14</pubdate>
|
||||
|
||||
<copyright>
|
||||
<year>2004</year>
|
||||
@ -170,11 +170,9 @@
|
||||
|
||||
<para>Unfortunately, Linux distributions don't have good bridge
|
||||
configuration tools and the network configuration GUIs don't detect the
|
||||
presence of bridge devices. You may refer to <ulink url="myfiles.htm">my
|
||||
configuration files</ulink> for an example of configuring a two-port
|
||||
bridge at system boot under <trademark>SuSE</trademark>. Here is an
|
||||
excerpt from a Debian <filename>/etc/network/interfaces</filename> file
|
||||
for a two-port bridge with a static IP address:</para>
|
||||
presence of bridge devices. Here is an excerpt from a Debian
|
||||
<filename>/etc/network/interfaces</filename> file for a two-port bridge
|
||||
with a static IP address:</para>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>auto br0
|
||||
@ -221,9 +219,97 @@ ONBOOT=yes</programlisting>
|
||||
</blockquote>
|
||||
|
||||
<para>On both the SuSE and Mandrake systems, a separate script is required
|
||||
to configure the bridge itself (again see <ulink url="myfiles.htm">my
|
||||
configuration files</ulink> for an example -
|
||||
<filename>/etc/init.d/bridge</filename>).</para>
|
||||
to configure the bridge itself.</para>
|
||||
|
||||
<para>Here are scripts that I used on a <trademark>Suse</trademark> 9.1
|
||||
system.</para>
|
||||
|
||||
<blockquote>
|
||||
<para><filename>/etc/sysconfig/network/ifcfg-br0</filename></para>
|
||||
|
||||
<programlisting>BOOTPROTO='dhcp'
|
||||
REMOTE_IPADDR=''
|
||||
STARTMODE='onboot'
|
||||
UNIQUE='3hqH.MjuOqWfSZ+C'
|
||||
WIRELESS='no'
|
||||
MTU=''</programlisting>
|
||||
|
||||
<para><filename>/etc/init.d/bridge</filename><programlisting>#!/bin/sh
|
||||
|
||||
################################################################################
|
||||
# Script to create a bridge
|
||||
#
|
||||
# (c) 2004 - Tom Eastep (teastep@shorewall.net)
|
||||
#
|
||||
# Modify the following variables to match your configuration
|
||||
#
|
||||
#### BEGIN INIT INFO
|
||||
# Provides: bridge
|
||||
# Required-Start: coldplug
|
||||
# Required-Stop:
|
||||
# Default-Start: 2 3 5
|
||||
# Default-Stop: 0 1 6
|
||||
# Description: starts and stops a bridge
|
||||
### END INIT INFO
|
||||
#
|
||||
# chkconfig: 2345 05 89
|
||||
# description: GRE/IP Tunnel
|
||||
#
|
||||
################################################################################
|
||||
|
||||
|
||||
PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin
|
||||
|
||||
INTERFACES="eth1 eth0"
|
||||
BRIDGE="br0"
|
||||
MODULES="tulip"
|
||||
|
||||
do_stop() {
|
||||
echo "Stopping Bridge $BRIDGE"
|
||||
brctl delbr $BRIDGE
|
||||
for interface in $INTERFACES; do
|
||||
ip link set $interface down
|
||||
done
|
||||
}
|
||||
|
||||
do_start() {
|
||||
|
||||
echo "Starting Bridge $BRIDGE"
|
||||
for module in $MODULES; do
|
||||
modprobe $module
|
||||
done
|
||||
|
||||
sleep 5
|
||||
|
||||
for interface in $INTERFACES; do
|
||||
ip link set $interface up
|
||||
done
|
||||
|
||||
brctl addbr $BRIDGE
|
||||
|
||||
for interface in $INTERFACES; do
|
||||
brctl addif $BRIDGE $interface
|
||||
done
|
||||
}
|
||||
|
||||
case "$1" in
|
||||
start)
|
||||
do_start
|
||||
;;
|
||||
stop)
|
||||
do_stop
|
||||
;;
|
||||
restart)
|
||||
do_stop
|
||||
sleep 1
|
||||
do_start
|
||||
;;
|
||||
*)
|
||||
echo "Usage: $0 {start|stop|restart}"
|
||||
exit 1
|
||||
esac
|
||||
exit 0</programlisting></para>
|
||||
</blockquote>
|
||||
|
||||
<para>Axel Westerhold has contributed this example of configuring a bridge
|
||||
with a static IP address on a Fedora System (Core 1 and Core 2 Test 1).
|
||||
@ -462,4 +548,4 @@ dmz br0:eth2</programlisting>
|
||||
</listitem>
|
||||
</itemizedlist>
|
||||
</section>
|
||||
</article>
|
||||
</article>
|
||||
Binary file not shown.
Binary file not shown.
Binary file not shown.
File diff suppressed because it is too large
Load Diff
Binary file not shown.
File diff suppressed because it is too large
Load Diff
BIN
Shorewall-docs2/images/network2.png
Executable file
BIN
Shorewall-docs2/images/network2.png
Executable file
Binary file not shown.
10725
Shorewall-docs2/images/network2.vdx
Executable file
10725
Shorewall-docs2/images/network2.vdx
Executable file
File diff suppressed because it is too large
Load Diff
@ -15,7 +15,7 @@
|
||||
</author>
|
||||
</authorgroup>
|
||||
|
||||
<pubdate>2004-10-09</pubdate>
|
||||
<pubdate>2004-10-14</pubdate>
|
||||
|
||||
<copyright>
|
||||
<year>2001-2004</year>
|
||||
@ -48,18 +48,18 @@
|
||||
|
||||
<caution>
|
||||
<para>The configuration shown here corresponds to Shorewall version
|
||||
2.1.7. My configuration uses features not available in earlier Shorewall
|
||||
releases.</para>
|
||||
2.1.11. My configuration uses 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> (Westell 2200) is
|
||||
connected to eth0 and has IP address 192.168.1.1 (factory default). The
|
||||
connected to eth1 and has IP address 192.168.1.1 (factory default). The
|
||||
modem is configured in <quote>bridge</quote> mode so PPPoE is not
|
||||
involved. I have a local network connected to eth2 (subnet 192.168.1.0/24)
|
||||
and a DMZ connected to eth1 (206.124.146.176/32). Note that I configure
|
||||
the same IP address on both <filename class="devicefile">eth0</filename>
|
||||
and <filename class="devicefile">eth1</filename>.</para>
|
||||
involved. I have a local network connected to eth0 (subnet 192.168.1.0/24)
|
||||
and a DMZ connected to eth2 (206.124.146.176/32). Note that I configure
|
||||
the same IP address on both <filename class="devicefile">eth1</filename>
|
||||
and <filename class="devicefile">eth2</filename>.</para>
|
||||
|
||||
<para>In this configuration:</para>
|
||||
|
||||
@ -96,8 +96,8 @@
|
||||
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para>I have Ursa (193.168.1.5/206.124.146.178) configured as a 2-port
|
||||
bridge.</para>
|
||||
<para>I have Ursa (192.168.1.5/192.168.3.254/206.124.146.178)
|
||||
configured as an IPSEC gateway for the Wireless network.</para>
|
||||
</listitem>
|
||||
|
||||
<listitem>
|
||||
@ -108,15 +108,14 @@
|
||||
|
||||
<para>The firewall runs on a 384MB K-6/II with SuSE 9.1.</para>
|
||||
|
||||
<para>Ursa runs Samba for file sharing with the Windows systems..</para>
|
||||
<para>Ursa runs Samba for file sharing with the Windows systems and is
|
||||
configured as a Wins server.</para>
|
||||
|
||||
<para>The wireless network connects to Ursa's eth0 via a LinkSys
|
||||
<para>The wireless network connects to Ursa's eth1 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>
|
||||
url="MAC_Validation.html">MAC verification</ulink> and <ulink
|
||||
url="IPSEC-2.6.html">Kernel 2.6 IPSEC</ulink>.</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
|
||||
@ -183,6 +182,7 @@ FW=fw
|
||||
IP_FORWARDING=On
|
||||
ADD_IP_ALIASES=Yes
|
||||
ADD_SNAT_ALIASES=Yes
|
||||
RETAIN_ALIASES=Yes
|
||||
TC_ENABLED=Yes
|
||||
CLEAR_TC=Yes
|
||||
MARK_IN_FORWARD_CHAIN=No
|
||||
@ -190,15 +190,16 @@ CLAMPMSS=Yes
|
||||
ROUTE_FILTER=No
|
||||
DETECT_DNAT_IPADDRS=Yes
|
||||
MUTEX_TIMEOUT=60
|
||||
|
||||
NEWNOTSYN=Yes
|
||||
BLACKLISTNEWONLY=Yes
|
||||
DELAYBLACKLISTLOAD=Yes
|
||||
DYNAMIC_ZONES=No
|
||||
DISABLE_IPV6=Yes
|
||||
PKTTYPE=No
|
||||
BLACKLIST_DISPOSITION=DROP
|
||||
MACLIST_DISPOSITION=REJECT
|
||||
TCP_FLAGS_DISPOSITION=DROP
|
||||
</programlisting>
|
||||
TCP_FLAGS_DISPOSITION=DROP</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
@ -209,7 +210,7 @@ TCP_FLAGS_DISPOSITION=DROP
|
||||
<para><programlisting>MIRRORS=<list of shorewall mirror ip addresses>
|
||||
NTPSERVERS=<list of the NTP servers I sync with>
|
||||
TEXAS=<ip address of gateway in Plano>
|
||||
OMAK=<ip address of tipper while we are at our second home>
|
||||
OMAK=64.139.97.48
|
||||
LOG=info
|
||||
EXT_IF=eth1
|
||||
INT_IF=eth0
|
||||
@ -222,10 +223,10 @@ DMZ_IF=eth2</programlisting></para>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE DISPLAY COMMENTS
|
||||
omak Omak Our Laptop at our second home
|
||||
net Internet Internet
|
||||
dmz DMZ Demilitarized zone
|
||||
loc Local Local networks
|
||||
omak Omak Our Laptop in Omak
|
||||
tx Texas Peer Network in Dallas
|
||||
#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE
|
||||
</programlisting>
|
||||
@ -240,10 +241,10 @@ tx Texas Peer Network in Dallas
|
||||
up my Ethernet interfaces.</para>
|
||||
|
||||
<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
|
||||
net $EXT_IF 206.124.146.255 dhcp,norfc1918,routefilter,blacklist,tcpflags,nosmurfs
|
||||
loc $INT_IF 192.168.1.255 dhcp
|
||||
dmz $DMZ_IF -
|
||||
- texas -
|
||||
net $EXT_IF 206.124.146.255 dhcp,norfc1918,routefilter,logmartians,blacklist,tcpflags,nosmurfs
|
||||
loc $INT_IF detect dhcp
|
||||
dmz $DMZ_IF -
|
||||
- texas -
|
||||
#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
@ -323,7 +324,6 @@ $EXT_IF $OMAK
|
||||
<programlisting>#SOURCE DESTINATION POLICY LOG LEVEL BURST:LIMIT
|
||||
fw fw ACCEPT
|
||||
loc net ACCEPT
|
||||
fw sec ACCEPT
|
||||
omak fw ACCEPT
|
||||
fw omak ACCEPT
|
||||
omak loc ACCEPT
|
||||
@ -334,7 +334,7 @@ omak dmz NONE
|
||||
dmz omak NONE
|
||||
omak tx NONE
|
||||
tx omak NONE
|
||||
$FW loc ACCEPT #Firewall to Local
|
||||
$FW loc ACCEPT
|
||||
$FW tx ACCEPT
|
||||
loc tx ACCEPT
|
||||
loc fw REJECT $LOG
|
||||
@ -362,8 +362,7 @@ all all REJECT $LOG
|
||||
<programlisting>#INTERFACE SUBNET ADDRESS
|
||||
+$EXT_IF::192.168.1.1 0.0.0.0/0 192.168.1.254
|
||||
$EXT_IF:2 eth2 206.124.146.179
|
||||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
|
||||
</programlisting>
|
||||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
@ -433,26 +432,6 @@ ACCEPT $MIRRORS
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/shorewall/action.Drop</title>
|
||||
|
||||
<blockquote>
|
||||
<para>This is my common action for the DROP policy. It is like the
|
||||
standard <emphasis role="bold">Drop</emphasis> action except that it
|
||||
allows <quote>Ping</quote>.</para>
|
||||
|
||||
<programlisting>#TARGET SOURCE DEST PROTO DEST SOURCE RATE USER/
|
||||
# PORT(S) PORT(S) LIMIT GROUP
|
||||
RejectAuth
|
||||
AllowPing
|
||||
dropBcast
|
||||
DropSMB
|
||||
DropUPnP
|
||||
dropNotSyn
|
||||
DropDNSrep</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/shorewall/action.Reject</title>
|
||||
|
||||
@ -477,6 +456,74 @@ DROP loc:eth2:!192.168.1.0/24 #So that my braindead Windows[tm] XP sy
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/racoon/setkey.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<para>This defines the policies for encryption to/from our second
|
||||
home.</para>
|
||||
|
||||
<programlisting>flush;
|
||||
spdflush;
|
||||
|
||||
spdadd 192.168.1.0/24 64.139.97.48/32 any -P out ipsec esp/tunnel/206.124.146.176-64.139.97.48/require;
|
||||
spdadd 64.139.97.48/32 192.168.1.0/24 any -P in ipsec esp/tunnel/64.139.97.48-206.124.146.176/require;
|
||||
spdadd 64.139.97.48/32 206.124.146.176/32 any -P in ipsec esp/tunnel/64.139.97.48-206.124.146.176/require;
|
||||
spdadd 206.124.146.176/32 64.139.97.48/32 any -P out ipsec esp/tunnel/206.124.146.176-64.139.97.48/require;
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/racoon/racoon.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<para>SA parameters for communication with our second home.</para>
|
||||
|
||||
<programlisting> path certificate "/etc/certs" ;
|
||||
listen
|
||||
{
|
||||
isakmp 206.124.146.176;
|
||||
}
|
||||
|
||||
remote 64.139.97.48
|
||||
{
|
||||
exchange_mode main ;
|
||||
certificate_type x509 "gateway.pem" "gateway_key.pem";
|
||||
verify_cert on;
|
||||
my_identifier asn1dn ;
|
||||
peers_identifier asn1dn ;
|
||||
verify_identifier on ;
|
||||
lifetime time 24 hour ;
|
||||
proposal {
|
||||
encryption_algorithm 3des;
|
||||
hash_algorithm sha1;
|
||||
authentication_method rsasig ;
|
||||
dh_group 2 ;
|
||||
}
|
||||
}
|
||||
|
||||
sainfo address 192.168.1.0/24 any address 64.139.97.48/32 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}
|
||||
|
||||
sainfo address 206.124.146.176/32 any address 64.139.97.48/32 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Rules File (The shell variables are set in
|
||||
/etc/shorewall/params)</title>
|
||||
@ -488,16 +535,17 @@ DROP loc:eth2:!192.168.1.0/24 #So that my braindead Windows[tm] XP sy
|
||||
###############################################################################################################################################################################
|
||||
# Local Network to Internet - Reject attempts by Trojans to call home, direct SMTP and MS Message Service
|
||||
#
|
||||
RejectSMTP loc net tcp 25
|
||||
REJECT:$LOG loc net tcp 6667,25
|
||||
REJECT:$LOG loc net udp 1025:1031
|
||||
#
|
||||
# Stop NETBIOS crap since our policy is ACCEPT
|
||||
# Stop NETBIOS crap
|
||||
#
|
||||
REJECT loc net tcp 137,445
|
||||
REJECT loc net udp 137:139
|
||||
#
|
||||
DROP loc:!192.168.1.0/24 net
|
||||
# Stop my idiotic XP box from sending to the net with an HP source IP address
|
||||
#
|
||||
DROP loc:!192.168.0.0/22 net
|
||||
#
|
||||
# SQUID
|
||||
#
|
||||
@ -505,13 +553,13 @@ REDIRECT loc 3128 tcp
|
||||
###############################################################################################################################################################################
|
||||
# Local Network to Firewall
|
||||
#
|
||||
DROP loc:!192.168.1.0/24 fw
|
||||
DROP loc:!192.168.0.0/22 fw # Silently drop traffic with an HP source IP from my XP box
|
||||
ACCEPT loc fw tcp ssh,time
|
||||
ACCEPT loc fw udp 161,ntp
|
||||
###############################################################################################################################################################################
|
||||
# Local Network to DMZ
|
||||
#
|
||||
DROP loc:!192.168.1.0/24 dmz
|
||||
DROP loc:!192.168.0.0/22 dmz
|
||||
ACCEPT loc dmz udp domain,xdmcp
|
||||
ACCEPT loc dmz tcp www,smtp,smtps,domain,ssh,imap,https,imaps,cvspserver,ftp,10027,pop3 -
|
||||
###############################################################################################################################################################################
|
||||
@ -530,12 +578,12 @@ DropPing net loc
|
||||
###############################################################################################################################################################################
|
||||
# Internet to DMZ
|
||||
#
|
||||
DNAT- net dmz:206.124.146.177 tcp smtp - 206.124.146.179,206.124.146.1
|
||||
78
|
||||
DNAT- net dmz:206.124.146.177 tcp smtp - 206.124.146.179,206.124.146.178
|
||||
ACCEPT net dmz tcp smtp,smtps,www,ftp,imaps,domain,https,cvspserver -
|
||||
ACCEPT net dmz udp domain
|
||||
ACCEPT net dmz udp 33434:33436
|
||||
Mirrors net dmz tcp rsync
|
||||
ACCEPT net:$OMAK dmz tcp 22 #SSH from Omak
|
||||
AllowPing net dmz
|
||||
###############################################################################################################################################################################
|
||||
#
|
||||
@ -621,27 +669,24 @@ ACCEPT tx loc:192.168.1.5 all
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Bridge (Ursa) Configuration</title>
|
||||
<title>IPSEC Gateway (Ursa) Configuration</title>
|
||||
|
||||
<para>As mentioned above, Ursa acts as a bridge. It's view of the network
|
||||
is diagrammed in the following figure.</para>
|
||||
<para>As mentioned above, Ursa acts as an IPSEC gateway for the wireless
|
||||
network. It's view of the network is diagrammed in the following
|
||||
figure.</para>
|
||||
|
||||
<graphic fileref="images/network1.png" />
|
||||
<graphic align="center" fileref="images/network1.png" valign="middle" />
|
||||
|
||||
<para>I've included the files that I used to configure that system -- some
|
||||
of them are SuSE-specific.</para>
|
||||
|
||||
<para>The configuration on Wookie can be modified to test various bridging
|
||||
features -- otherwise, it serves to isolate the Wireless network from the
|
||||
rest of our systems.</para>
|
||||
|
||||
<section>
|
||||
<title>shorewall.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<para>Only the changes from the defaults are shown.</para>
|
||||
|
||||
<programlisting>BRIDGING=Yes</programlisting>
|
||||
<programlisting>CLAMPMSS=1400 # There is an MTU problem between Tipper and the IMAP server at work. This corrects the problem</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
@ -657,6 +702,7 @@ ACCEPT tx loc:192.168.1.5 all
|
||||
loc Local Local networks
|
||||
net Internet The Big Bad Internet
|
||||
WiFi Wireless Wireless Network
|
||||
sec Secure Secure Wireless Network
|
||||
#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
@ -669,17 +715,26 @@ WiFi Wireless Wireless Network
|
||||
<programlisting>#SOURCE DEST POLICY LOG LIMIT:BURST
|
||||
loc fw ACCEPT
|
||||
loc net NONE
|
||||
loc WiFi ACCEPT
|
||||
loc sec ACCEPT
|
||||
net fw ACCEPT
|
||||
net WiFi ACCEPT
|
||||
net loc NONE
|
||||
net sec ACCEPT
|
||||
sec fw ACCEPT
|
||||
sec loc ACCEPT
|
||||
sec net ACCEPT
|
||||
fw loc ACCEPT
|
||||
fw net ACCEPT
|
||||
fw sec ACCEPT
|
||||
fw WiFi ACCEPT
|
||||
sec WiFi NONE
|
||||
WiFi sec NONE
|
||||
WiFi net ACCEPT
|
||||
fw all ACCEPT
|
||||
#
|
||||
# THE FOLLOWING POLICY MUST BE LAST
|
||||
#
|
||||
all all REJECT info
|
||||
#LAST LINE -- DO NOT REMOVE</programlisting>
|
||||
|
||||
<blockquote>
|
||||
<para></para>
|
||||
</blockquote>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
@ -688,19 +743,31 @@ all all REJECT info
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
|
||||
- br0 192.168.1.255 dhcp
|
||||
net eth0 192.168.1.255 dhcp,nobogons,blacklist
|
||||
WiFi eth1 192.168.3.255 nobogons,blacklist,maclist,routeback
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>ipsec</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE IPSEC OPTIONS IN OUT
|
||||
# ONLY OPTIONS OPTIONS
|
||||
sec yes mode=tunnel tunnel-src=192.168.3.8 tunnel-dst=192.168.3.8
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>hosts</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE HOST(S) OPTIONS
|
||||
loc br0:eth1:192.168.1.0/24
|
||||
net br0:eth1
|
||||
WiFi br0:eth0 maclist
|
||||
sec eth1:0.0.0.0/0 routeback
|
||||
loc eth0:192.168.1.0/24
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS LINE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
@ -711,16 +778,6 @@ WiFi br0:eth0 maclist
|
||||
<blockquote>
|
||||
<programlisting>#ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL
|
||||
# PORT PORT(S) DEST
|
||||
ACCEPT WiFi loc udp 137:139
|
||||
ACCEPT WiFi loc tcp 22,80,137,139,445,631,901,3389
|
||||
ACCEPT WiFi loc udp 1024: 137
|
||||
ACCEPT WiFi loc udp 177,123
|
||||
ACCEPT WiFi loc:192.168.1.4 tcp 1723
|
||||
ACCEPT WiFi loc:192.168.1.4 47
|
||||
ACCEPT WiFi loc tcp 5900:5909
|
||||
|
||||
ACCEPT WiFi fw tcp ssh,80,111,137,139,445,9100:9104
|
||||
ACCEPT WiFi fw udp
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
@ -730,7 +787,7 @@ ACCEPT WiFi fw udp
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#INTERFACE HOST(S) OPTIONS
|
||||
br0 0.0.0.0/0 routeback
|
||||
eth0 0.0.0.0/0
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
@ -740,119 +797,258 @@ br0 0.0.0.0/0 routeback
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#INTERFACE MAC IP ADDRESSES (Optional)
|
||||
br0:eth0 00:A0:1C:DB:0C:A0 192.168.1.7 #Work Laptop
|
||||
br0:eth0 00:04:59:0e:85:b9 #WAP11
|
||||
br0:eth0 00:06:D5:45:33:3c #WET11
|
||||
br0:eth0 00:0b:c1:53:cc:97 192.168.1.8 #TIPPER
|
||||
eth1 00:A0:1C:DB:0C:A0 192.168.3.7 #Work Laptop
|
||||
eth1 00:04:59:0e:85:b9 #WAP11
|
||||
eth1 00:06:D5:45:33:3c #WET11
|
||||
eth1 00:0b:c1:53:cc:97 192.168.3.8 #TIPPER
|
||||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/init.d/bridge</title>
|
||||
<title>/etc/racoon/setkey.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<para>This file is SuSE-specific and creates the bridge device
|
||||
<filename class="devicefile">br0</filename>. A script for other
|
||||
distributions would be similar (see the <ulink
|
||||
url="bridge.html">Shorewall Bridge documentation</ulink> for
|
||||
examples).</para>
|
||||
<para>This defines encryption policies to/from the wireless
|
||||
network.</para>
|
||||
|
||||
<programlisting>#!/bin/sh
|
||||
################################################################################
|
||||
# Script to create a bridge
|
||||
#
|
||||
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
|
||||
#
|
||||
# (c) 2004 - Tom Eastep (teastep@shorewall.net)
|
||||
#
|
||||
# Modify the following variables to match your configuration
|
||||
#
|
||||
#### BEGIN INIT INFO
|
||||
# Provides: bridge
|
||||
# Required-Start: coldplug
|
||||
# Required-Stop:
|
||||
# Default-Start: 2 3 5
|
||||
# Default-Stop: 0 1 6
|
||||
# Description: starts and stops a bridge
|
||||
### END INIT INFO
|
||||
#
|
||||
# chkconfig: 2345 05 89
|
||||
# description: Layer 2 Bridge
|
||||
#
|
||||
################################################################################
|
||||
<programlisting>flush;
|
||||
spdflush;
|
||||
|
||||
PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin
|
||||
|
||||
INTERFACES="eth0 eth1"
|
||||
BRIDGE="br0"
|
||||
|
||||
do_stop() {
|
||||
echo "Stopping Bridge $BRIDGE"
|
||||
brctl delbr $BRIDGE
|
||||
for interface in $INTERFACES; do
|
||||
ip link set $interface down
|
||||
done
|
||||
}
|
||||
|
||||
do_start() {
|
||||
|
||||
echo "Starting Bridge $BRIDGE"
|
||||
for interface in $INTERFACES; do
|
||||
ip link set $interface up
|
||||
done
|
||||
|
||||
brctl addbr $BRIDGE
|
||||
|
||||
for interface in $INTERFACES; do
|
||||
brctl addif $BRIDGE $interface
|
||||
done
|
||||
}
|
||||
|
||||
case "$1" in
|
||||
start)
|
||||
do_start
|
||||
;;
|
||||
stop)
|
||||
do_stop
|
||||
;;
|
||||
restart)
|
||||
do_stop
|
||||
sleep 1
|
||||
do_start
|
||||
;;
|
||||
*)
|
||||
echo "Usage: $0 {start|stop|restart}"
|
||||
exit 1
|
||||
esac
|
||||
exit 0</programlisting>
|
||||
spdadd 0.0.0.0/0 192.168.3.8/32 any -P out ipsec esp/tunnel/192.168.3.254-192.168.3.8/require;
|
||||
spdadd 192.168.3.8/32 0.0.0.0/0 any -P in ipsec esp/tunnel/192.168.3.8-192.168.3.254/require;</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/sysconfig/network/ifcfg-br0</title>
|
||||
<title>/etc/racoon/racoon.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<para>This file is SuSE-specific</para>
|
||||
<para>SA parameters for communication with our wireless network
|
||||
(Tipper is currently the only Wireless host).</para>
|
||||
|
||||
<programlisting>BOOTPROTO='dhcp'
|
||||
REMOTE_IPADDR=''
|
||||
STARTMODE='onboot'
|
||||
UNIQUE='3hqH.MjuOqWfSZ+C'
|
||||
WIRELESS='no'
|
||||
MTU=''</programlisting>
|
||||
<programlisting>path certificate "/etc/certs";
|
||||
|
||||
listen
|
||||
{
|
||||
isakmp 192.168.3.254;
|
||||
}
|
||||
|
||||
remote 192.168.3.8
|
||||
{
|
||||
exchange_mode main ;
|
||||
certificate_type x509 "ursa.pem" "ursa_key.pem";
|
||||
verify_cert on;
|
||||
my_identifier asn1dn ;
|
||||
peers_identifier asn1dn ;
|
||||
verify_identifier on ;
|
||||
lifetime time 24 hour ;
|
||||
proposal {
|
||||
encryption_algorithm 3des;
|
||||
hash_algorithm sha1;
|
||||
authentication_method rsasig ;
|
||||
dh_group 2 ;
|
||||
}
|
||||
}
|
||||
|
||||
sainfo address 0.0.0.0/0 any address 192.168.3.8/32 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>Tipper Configuration</title>
|
||||
|
||||
<para>This laptop is either configured on our wireless network
|
||||
(192.168.3.8) or as a standalone system in our second home (64.139.97.48).
|
||||
The Shorewall and Racoon configurations are the same regardless of where
|
||||
Tipper is connected -- only the IP configuration changes.</para>
|
||||
|
||||
<para>Tipper's view of the work is shown in the following diagram:</para>
|
||||
|
||||
<graphic align="center" fileref="images/network2.png" valign="middle" />
|
||||
|
||||
<para>The key configuration files are shown in the following
|
||||
sections.</para>
|
||||
|
||||
<section>
|
||||
<title>zones</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE DISPLAY COMMENTS
|
||||
home Home Shorewall Network
|
||||
net Net Internet
|
||||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/sysconfig/network/routes</title>
|
||||
<title>policy</title>
|
||||
|
||||
<blockquote>
|
||||
<para>This file is SuSE-specific</para>
|
||||
<programlisting>#SOURCE DEST POLICY LOG LEVEL LIMIT:BURST
|
||||
fw net ACCEPT
|
||||
fw home ACCEPT
|
||||
home fw ACCEPT
|
||||
net home NONE
|
||||
home net NONE
|
||||
net all DROP info
|
||||
# The FOLLOWING POLICY MUST BE LAST
|
||||
all all REJECT info
|
||||
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<programlisting>192.168.1.0/24 dev br0 proto kernel scope link src 192.168.1.5
|
||||
127.0.0.0/8 dev lo scope link
|
||||
default via 192.168.1.254 dev br0</programlisting>
|
||||
<section>
|
||||
<title>interfaces</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE INTERFACE BROADCAST OPTIONS
|
||||
net eth0 detect dhcp,tcpflags
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>ipsec</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE IPSEC OPTIONS IN OUT
|
||||
# ONLY OPTIONS OPTIONS
|
||||
home yes mode=tunnel
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>hosts</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ZONE HOST(S) OPTIONS
|
||||
home eth0:0.0.0.0/0
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS LINE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>rules</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>#ACTION SOURCE DEST PROTO DEST SOURCE ORIGINAL RATE USER/
|
||||
# PORT PORT(S) DEST LIMIT GROUP
|
||||
ACCEPT net fw icmp 8
|
||||
ACCEPT net fw tcp 22
|
||||
ACCEPT net fw tcp 4000:4100
|
||||
#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/racoon/setkey.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>flush;
|
||||
spdflush;
|
||||
|
||||
# Policies for while we are in Omak
|
||||
|
||||
spdadd 64.139.97.48/32 206.124.146.176/32 any -P out ipsec esp/tunnel/64.139.97.48-206.124.146.176/require;
|
||||
spdadd 206.124.146.176/32 64.139.97.48/32 any -P in ipsec esp/tunnel/206.124.146.176-64.139.97.48/require;
|
||||
spdadd 192.168.1.0/24 64.139.97.48/32 any -P in ipsec esp/tunnel/206.124.146.176-64.139.97.48/require;
|
||||
spdadd 64.139.97.48/32 192.168.1.0/24 any -P out ipsec esp/tunnel/64.139.97.48-206.124.146.176/require;
|
||||
|
||||
# Policies for while we're connected via Wireless at home
|
||||
|
||||
spdadd 192.168.3.8/32 192.168.3.8/32 any -P in none;
|
||||
spdadd 192.168.3.8/32 192.168.3.8/32 any -P out none;
|
||||
spdadd 127.0.0.0/8 127.0.0.0/8 any -P in none;
|
||||
spdadd 127.0.0.0/8 127.0.0.0/8 any -P out none;
|
||||
spdadd 0.0.0.0/0 192.168.3.8/32 any -P in ipsec esp/tunnel/192.168.3.254-192.168.3.8/require;
|
||||
spdadd 192.168.3.8/32 0.0.0.0/0 any -P out ipsec esp/tunnel/192.168.3.8-192.168.3.254/require;
|
||||
</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
|
||||
<section>
|
||||
<title>/etc/racoon/racoon.conf</title>
|
||||
|
||||
<blockquote>
|
||||
<programlisting>path certificate "/etc/certs";
|
||||
|
||||
listen
|
||||
{
|
||||
isakmp 64.139.97.48;
|
||||
isakmp 192.168.3.8;
|
||||
}
|
||||
|
||||
remote 206.124.146.176
|
||||
{
|
||||
exchange_mode main ;
|
||||
certificate_type x509 "tipper.pem" "tipper_key.pem";
|
||||
verify_cert on;
|
||||
my_identifier asn1dn ;
|
||||
peers_identifier asn1dn ;
|
||||
verify_identifier on ;
|
||||
lifetime time 24 hour ;
|
||||
proposal {
|
||||
encryption_algorithm 3des;
|
||||
hash_algorithm sha1;
|
||||
authentication_method rsasig ;
|
||||
dh_group 2 ;
|
||||
}
|
||||
}
|
||||
|
||||
remote 192.168.3.254
|
||||
{
|
||||
exchange_mode main ;
|
||||
certificate_type x509 "tipper.pem" "tipper_key.pem";
|
||||
verify_cert on;
|
||||
my_identifier asn1dn ;
|
||||
peers_identifier asn1dn ;
|
||||
verify_identifier on ;
|
||||
lifetime time 24 hour ;
|
||||
proposal {
|
||||
encryption_algorithm 3des;
|
||||
hash_algorithm sha1;
|
||||
authentication_method rsasig ;
|
||||
dh_group 2 ;
|
||||
}
|
||||
}
|
||||
|
||||
sainfo address 64.139.97.48/32 any address 192.168.1.0/24 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}
|
||||
|
||||
sainfo address 64.139.97.48/32 any address 206.124.146.176/32 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}
|
||||
|
||||
sainfo address 192.168.3.8/32 any address 0.0.0.0/0 any
|
||||
{
|
||||
pfs_group 2;
|
||||
lifetime time 12 hour ;
|
||||
encryption_algorithm 3des, blowfish, des, rijndael ;
|
||||
authentication_algorithm hmac_sha1, hmac_md5 ;
|
||||
compression_algorithm deflate ;
|
||||
}</programlisting>
|
||||
</blockquote>
|
||||
</section>
|
||||
</section>
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
</author>
|
||||
</authorgroup>
|
||||
|
||||
<pubdate>2004-09-21</pubdate>
|
||||
<pubdate>2004-10-12</pubdate>
|
||||
|
||||
<copyright>
|
||||
<year>2001-2004</year>
|
||||
@ -60,7 +60,7 @@
|
||||
|
||||
<listitem>
|
||||
<para>The <ulink url="FAQ.htm">FAQ</ulink> has solutions to more than
|
||||
30 common problems.</para>
|
||||
40 common problems.</para>
|
||||
</listitem>
|
||||
|
||||
<listitem>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user