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First round of 3.0 documentation changes
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@2580 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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@ -15,10 +15,10 @@
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</author>
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</authorgroup>
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<pubdate>2004-04-19</pubdate>
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<pubdate>2005-08-28</pubdate>
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<copyright>
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<year>2003-2004</year>
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<year>2003-2005</year>
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<holder>Thomas M. Eastep</holder>
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</copyright>
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@ -34,9 +34,6 @@
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</legalnotice>
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</articleinfo>
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<para>Shorewall Traffic Accounting support was added in Shorewall release
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1.4.7.</para>
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<para>Shorewall accounting rules are described in the file
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/etc/shorewall/accounting. By default, the accounting rules are placed in a
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chain called <quote>accounting</quote> and can thus be displayed using
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@ -122,9 +119,8 @@
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</listitem>
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<listitem>
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<para><emphasis role="bold">USER/GROUP</emphasis> (Added in Shorewall
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2.2.0) - This column may only be non-empty if the CHAIN is OUTPUT. The
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column may contain:</para>
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<para><emphasis role="bold">USER/GROUP</emphasis> - This column may only
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be non-empty if the CHAIN is OUTPUT. The column may contain:</para>
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<programlisting> [!][<user name or number>][:<group name or number>]</programlisting>
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@ -15,7 +15,7 @@
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</author>
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</authorgroup>
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<pubdate>2005-05-13</pubdate>
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<pubdate>2005-08-28</pubdate>
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<copyright>
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<year>2005</year>
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@ -34,6 +34,12 @@
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</legalnotice>
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</articleinfo>
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<caution>
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<para>This article applies to Shorewall 3.0 and later. If you are running
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a version of Shorewall earlier than Shorewall 3.0.0 then please see the
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documentation for that release.</para>
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</caution>
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<section>
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<title>What are Shorewall Actions?</title>
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@ -167,16 +173,16 @@ Reject:REJECT #Common Action for REJECT policy</programlisting>
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action begins with a capital letter; that way, the name won't conflict
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with a Shorewall-defined chain name.</para>
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<para>Beginning with Shorewall-2.0.0-Beta1, the name of the action may
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be optionally followed by a colon (<quote>:</quote>) and ACCEPT, DROP
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or REJECT. When this is done, the named action will become the
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<emphasis>common action </emphasis>for policies of type ACCEPT, DROP
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or REJECT respectively. The common action is applied immediately
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before the policy is enforced (before any logging is done under that
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policy) and is used mainly to suppress logging of uninteresting
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traffic which would otherwise clog your logs. The same policy name can
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appear in multiple actions; the last such action for each policy name
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is the one which Shorewall will use.</para>
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<para>The name of the action may be optionally followed by a colon
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(<quote>:</quote>) and ACCEPT, DROP or REJECT. When this is done, the
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named action will become the <emphasis>common action </emphasis>for
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policies of type ACCEPT, DROP or REJECT respectively. The common
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action is applied immediately before the policy is enforced (before
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any logging is done under that policy) and is used mainly to suppress
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logging of uninteresting traffic which would otherwise clog your logs.
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The same policy name can appear in multiple actions; the last such
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action for each policy name is the one which Shorewall will
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use.</para>
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<para>Shorewall includes pre-defined actions for DROP and REJECT --
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see above.</para>
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@ -369,12 +375,9 @@ LogAndAccept loc fw tcp 22</programlisting>
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<section>
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<title>Actions and Logging</title>
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<para>Prior to Shorewall 2.1.2, specifying a log level (and optionally a
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log tag) on a rule that specified a user-defined (or Shorewall-defined)
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action would log all traffic passed to the action. Beginning with
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Shorewall 2.1.2, specifying a log level in a rule that specifies a user-
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or Shorewall-defined action will cause each rule in the action to be
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logged with the specified level (and tag).</para>
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<para>Specifying a log level in a rule that specifies a user- or
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Shorewall-defined action will cause each rule in the action to be logged
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with the specified level (and tag).</para>
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<para>The extent to which logging of action rules occur is governed by the
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following:</para>
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File diff suppressed because it is too large
Load Diff
@ -15,10 +15,10 @@
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</author>
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</authorgroup>
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<pubdate>2004-10-25</pubdate>
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<pubdate>2005-08-28</pubdate>
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<copyright>
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<year>2002-2004</year>
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<year>2002-2005</year>
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<holder>Thomas M. Eastep</holder>
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</copyright>
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@ -38,16 +38,14 @@
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<title>Introduction</title>
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<para>Shorewall supports two different forms of blacklisting; static and
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dynamic. Beginning with Shorewall version 1.4.8, the BLACKLISTNEWONLY
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option in /etc/shorewall/shorewall.conf controls the degree of blacklist
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filtering:</para>
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dynamic. The BLACKLISTNEWONLY option in /etc/shorewall/shorewall.conf
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controls the degree of blacklist filtering:</para>
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<orderedlist>
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<listitem>
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<para>BLACKLISTNEWONLY=No -- All incoming packets are checked
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against the blacklist. New blacklist entries can be used to terminate
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existing connections. Versions of Shorewall prior to 1.4.8 behave in
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this manner.</para>
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existing connections.</para>
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</listitem>
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<listitem>
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@ -66,10 +64,12 @@
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</important>
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<important>
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<para><emphasis role="bold">Neither form of Shorewall blacklisting is
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appropriate for blacklisting 1,000s of different addresses</emphasis>.
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The blacklists will take forever to load and will have a very negative
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effect on firewall performance.</para>
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<para><emphasis role="bold">Dynamic Shorewall blacklisting is not
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appropriate for blacklisting 1,000s of different addresses. Static
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Blacklisting can handle large blacklists but only if you use
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ipsets</emphasis>. Without ipsets, the blacklists will take forever to
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load and will have a very negative effect on firewall
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performance.</para>
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</important>
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</section>
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@ -97,8 +97,8 @@
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<para>You list the IP addresses/subnets that you wish to blacklist in
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<ulink
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url="Documentation.htm#Blacklist"><filename>/etc/shorewall/blacklist</filename></ulink>.
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Beginning with Shorewall version 1.3.8, you may also specify PROTOCOL
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and Port numbers/Service names in the blacklist file.</para>
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You may also specify PROTOCOL and Port numbers/Service names in the
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blacklist file.</para>
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</listitem>
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<listitem>
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@ -123,14 +123,41 @@
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blacklisted hosts to slip by during construction of the blacklist, it can
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substantially reduce the time that all new connections are disabled during
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"shorewall [re]start".</para>
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<para>Beginning with Shorewall 2.4.0, you can use <ulink
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url="ipsets.html">ipsets</ulink> to define your static blacklist. Here's
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an example:</para>
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<programlisting>#ADDRESS/SUBNET PROTOCOL PORT
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+Blacklistports[dst]
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+Blacklistnets[src,dst]
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+Blacklist[src,dst]
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#LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE -- DO NOT REMOVE</programlisting>
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<para>In this example, there is a portmap ipset
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<emphasis>Blacklistports</emphasis> that blacklists all traffic with
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destination ports included in the ipsec. There are also
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<emphasis>Blacklistnets</emphasis> (type <emphasis>nethash</emphasis>) and
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<emphasis>Blacklist</emphasis> (type <emphasis>iphash</emphasis>) ipsets
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that allow blacklisting networks and individual IP addresses. Note that
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[src,dst] is specified so that individual entries in the sets can be bound
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to other portmap ipsets to allow blacklisting (<emphasis>source
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address</emphasis>, <emphasis>destination port</emphasis>) combinations.
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For example:</para>
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<programlisting>ipset -N SMTP portmap --from 1 --to 31
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ipset -A SMTP 25
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ipset -A Blacklist 206.124.146.177
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ipset -B Blacklist 206.124.146.177 -b SMTP</programlisting>
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<para>This will blacklist SMTP traffic from host 206.124.146.177.</para>
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</section>
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<section>
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<title>Dynamic Blacklisting</title>
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<para>Dynamic blacklisting support was added in version 1.3.2. Dynamic
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blacklisting doesn't use any configuration parameters but is rather
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controlled using /sbin/shorewall commands:</para>
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<para>Dynamic blacklisting doesn't use any configuration parameters but is
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rather controlled using /sbin/shorewall commands:</para>
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<itemizedlist>
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<listitem>
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@ -15,7 +15,7 @@
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</author>
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</authorgroup>
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<pubdate>2005-06-02</pubdate>
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<pubdate>2005-08-28</pubdate>
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<copyright>
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<year>2001-2005</year>
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@ -201,15 +201,6 @@
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<filename>/etc/shorewall</filename> and modify the
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copy</emphasis>.</para>
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</listitem>
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<listitem>
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<para><filename>/usr/share/bogons</filename> — Defines the behavior
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of the 'nobogons' interface option in
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<filename>/etc/shorewall/interfaces</filename>. <emphasis
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role="bold">If you need to change this file, copy it to
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<filename>/etc/shorewall</filename> and modify the
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copy</emphasis>.</para>
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</listitem>
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</itemizedlist></para>
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</section>
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