shorewall6-exclusion(5)

NAME

   exclusion - Exclude a set of hosts from a definition in a shorewall6
   configuration file.

SYNOPSIS

   !address-or-range[,address-or-range]...

   !zone-name[,zone-name]...

DESCRIPTION

   Exclusion is used when you wish to exclude one or more addresses from a
   definition. An exclamation point is followed by a comma-separated list
   of addresses. The addresses may be single host addresses (e.g.,
   fe80::2a0:ccff:fedb:31c4) or they may be network addresses in CIDR
   format (e.g., fe80::2a0:ccff:fedb:31c4/64). If your kernel and
   ip6tables include iprange support, you may also specify ranges of ip
   addresses of the form lowaddress-highaddress

   No embedded white-space is allowed.

   Exclusion can appear after a list of addresses and/or address ranges.
   In that case, the final list of address is formed by taking the first
   list and then removing the addresses defined in the exclusion.

   Beginning in Shorewall 4.4.13, the second form of exclusion is allowed
   after all and any in the SOURCE and DEST columns of
   /etc/shorewall/rules. It allows you to omit arbitrary zones from the
   list generated by those key words.

       Warning
       If you omit a sub-zone and there is an explicit or explicit
       CONTINUE policy, a connection to/from that zone can still be
       matched by the rule generated for a parent zone.

       For example:

       /etc/shorewall6/zones:

           #ZONE          TYPE
           z1             ip
           z2:z1          ip
           ...

       /etc/shorewall6/policy:

           #SOURCE         DEST          POLICY
           z1              net           CONTINUE
           z2              net           REJECT

       /etc/shorewall6/rules:

           #ACTION         SOURCE        DEST        PROTO         DEST
           #                                                       PORT(S)
           ACCEPT          all!z2        net         tcp           22

       In this case, SSH connections from z2 to net will be accepted by
       the generated z1 to net ACCEPT rule.

FILES

   /etc/shorewall6/hosts

   /etc/shorewall6/masq

   /etc/shorewall6/rules

   /etc/shorewall6/tcrules

SEE ALSO

   shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
   shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
   shorewall6-maclist(5), shorewall6-netmap(5),shorewall6-params(5),
   shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5),
   shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
   shorewall6-secmarks(5), shorewall6-tcclasses(5),
   shorewall6-tcdevices(5), shorewall6-mangle(5), shorewall6-tos(5),
   shorewall6-tunnels(5), shorewall-zones(5)

Opportunity

Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.

Education

Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.