Net::DNS - Perl DNS Resolver Module =================================== TABLE OF CONTENTS ----------------- 1. Description 2. Availability 3. Prerequisites 4. Installation 5. Running Tests 6. Demonstration Scripts 7. Dynamic Updates 8. Signed Queries & Updates 9. DNSSEC 10. Bugs 11. Copyright 12. License 13. Staying Tuned 14. Acknowledgments 1. DESCRIPTION ----------- Net::DNS is a DNS resolver implemented in Perl. It allows the programmer to perform nearly any type of DNS query from a Perl script. For details and examples, please read the Net::DNS manual page. To read about the latest features, see the Changes file. To find out about known bugs and to see what is planned for future versions, see the CPAN RT ticket list. The author invites feedback on Net::DNS. If there is something you would like to have added, please let me know. If you find a bug, please send me the information described in the BUGS section below. See http://www.net-dns.org/blog/ for announcements about Net::DNS. 2. AVAILABILITY ------------ You can get the latest version of Net::DNS from the Comprehensive Perl Archive Network (CPAN) or from the module's homepage: http://search.cpan.org/dist/Net-DNS/ or through http://www.net-dns.org/ Additionally a subversion repository is made available through http://www.net-dns.org/svn/net-dns/ The version on the "trunk" (http://www.net-dns.org/svn/net-dns/trunk) is the version that is targeted for next release. Please note that the SVN version at any given moment may be broken. 3. PREREQUISITES ------------- The availability of prerequisites for Net::DNS is tested at installation time. These are the core packages that need to be available: Test::More IO::Socket Digest::HMAC Digest::MD5 Digest::SHA MIME::Base32 MIME::Base64 Time::Local The availability of these optional packages is tested at runtime: Digest::BubbleBabble Digest::GOST IO::Socket::INET6 Net::DNS::SEC Net::LibIDN You can obtain the latest version of Perl from: http://www.cpan.org/src/ Some of the demonstration and contributed scripts may require additional modules -- see demo/README and contrib/README for details. Note that the Test::More module is actually part of the Test-Simple distribution. See the FAQ (lib/Net/DNS/FAQ.pod) for more information. 4. INSTALLATION ------------ Please install any modules mentioned in the PREREQUISITES section above. If you do not, some features of Net::DNS will not work. When you run "perl Makefile.PL", Perl should complain if any of the required modules is missing. To build this module, run the following commands: tar xvzf Net-DNS-?.??.tar.gz cd Net-DNS-?.?? perl Makefile.PL make make test make install If you do not wish to run the online tests, the '--no-online-tests' option can be used. Similarly, '--online-tests' will enable the online tests. Online tests will be run by default, but the result will not adversely affect the outcome of test suite. Also, if you do not wish to run the IPv6 tests, the '--no-IPv6-tests' option can be used. Similarly, '--IPv6-tests' will enable the IPv6 tests. 5. RUNNING TESTS ------------- If any of the tests fail, please contact the author with the output from the following command: make test TEST_VERBOSE=1 6. DEMONSTRATION SCRIPTS --------------------- There are a few demonstration scripts in the demo/ directory -- see demo/README for more information. Contributed scripts are in the contrib/ directory -- see contrib/README. The author would be happy to include any contributed scripts in future versions of this module. All I ask is that they be documented (preferably using POD) and that the contributor's name and contact information be mentioned somewhere. 7. DYNAMIC UPDATES --------------- Net::DNS supports DNS dynamic updates as documented in RFC 2136; for more information and examples, please see the Net::DNS::Update manual page. Here is a summary of the update semantics for those interested (see RFC 2136 for details): PREREQUISITE SECTION # RRs NAME TTL CLASS TYPE RDLENGTH RDATA ----- ---- --- ----- ---- -------- ----- yxrrset 1 name 0 ANY type 0 empty yxrrset 1+ name 0 class type rdlength rdata nxrrset 1 name 0 NONE type 0 empty yxdomain 1 name 0 ANY ANY 0 empty nxdomain 1 name 0 NONE ANY 0 empty UPDATE SECTION # RRs NAME TTL CLASS TYPE RDLENGTH RDATA ----- ---- --- ----- ---- -------- ----- add RRs 1+ name ttl class type rdlength rdata del RRset 1 name 0 ANY type 0 empty del all RRsets 1 name 0 ANY ANY 0 empty del RRs 1+ name 0 NONE type rdlength rdata 8. SIGNED QUERIES & UPDATES ------------------------ Net::DNS supports the TSIG resource record to perform signed queries and updates (RFC 2845). See the Net::DNS::Packet and Net::DNS::Update manual pages for examples. If you're using the BIND nameserver, the BIND FAQ shows how to generate keys and configure the nameserver to use them: http://www.nominum.com/resources/faqs/bind-faq.html TSIG support is new and isn't yet complete. Please use with caution on production systems. Feedback on TSIG functionality would be most welcome. 9. DNSSEC ------ The extensions to enable the DNSSEC signature generation and verification functions are distributed separately as Net::DNS::SEC. The package is available from CPAN. 10. BUGS ---- Net::DNS, although begun in 1997, is still under development and may still contain a few bugs. Please see CPAN RT and Changes file for more information. I recommend that you exercise caution when using Net::DNS to maintain a production nameserver via dynamic updates. Always test your code *thoroughly*. The Net::DNS authors accept no blame if you corrupt your zone. That warning in place, I am aware of at least one large company that has used Net::DNS to make thousands of dynamic updates per day for nearly three years without any problems. Please use the following form to submit bug reports: https://rt.cpan.org/NoAuth/ReportBug.html?Queue=Net-DNS If you find a bug, please report it in "rt.cpan.org" along with the following information: * version of Perl (output of 'perl -V' is best) * version of Net::DNS * operating system type and version * version of nameserver (if known) * exact text of error message or description of problem * the shortest possible program that exhibits the problem * the specific queries you are making, if the fault can be demonstrated using Internet nameservers If I do not have access to a system similar to yours, I may ask you to insert some debugging lines and report back on the results. The more help and information you can provide, the better. Net::DNS is currently maintained at NLnet Labs (www.nlnetlabs.nl) by: Willem Toorop. Between 2005 and 2012 Net::DNS was maintained by: Olaf Kolkman and his team. Between 2002 and 2004 Net::DNS was maintained by Chris Reinhardt. Net::DNS was created in 1997 by Michael Fuhr. 11. COPYRIGHT --------- Authorship of individual components and significant contributions is shown in the copyright notice attached to the relevant documentation. Copyright in all components is retained by their respective authors. 12. LICENSE ------- Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of the author not be used in advertising or publicity pertaining to distribution of the software without specific prior written permission. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 13. STAYING TUNED ------------- http://www.net-dns.org is a web site dedicated to the development of Net::DNS. Announcements about Net::DNS and Net::DNS::SEC will be done through the Net::DNS weblog at http://www.net-dns.org/blog/. An RSS feed for the weblog is available. If you want to have access to the latest and greatest code a subversion repository is made available through http://www.net-dns.org/svn/net-dns/ The version on the "trunk" (http://www.net-dns.org/svn/net-dns/trunk) is the version that is targeted for next release. Please note that code from the SVN repositories trunk and development branches may be broken at any time. 14. ACKNOWLEDGMENTS --------------- Thanks to Mike for letting me take care of his baby. Thanks to Chris for maintaining Net::DNS for a couple of years. Thanks to Olaf for maintaining Net::DNS for over eight years. Thanks to Rob Brown and Dick Franks for all their patches and input. Thanks to all who have used Net::DNS and reported bugs, made suggestions, contributed code, and encouraged me to add certain features. Many of these people are mentioned by name in the Changes and TODO files; lack of mention should be considered an oversight and not a conscious act of omission. Thanks to Larry Wall and all who have made Perl possible. Thanks to Paul Albitz and Cricket Liu for allowing me [OK: that is Mike] to write the Net::DNS section in the programming chapter of DNS and BIND, 3rd Edition. This chapter in earlier editions was very helpful while I was developing Net::DNS, and I was proud to contribute to it. Thanks to Paul Vixie and all who have worked on the BIND nameserver, which I've used exclusively while developing Net::DNS. Thanks to Andreas Gustafsson for DNAME support, and for all the work he has done on BIND 9. Olaf acknowledges the RIPE NCC for allowing Net::DNS maintenance to take place as part of 'the job'. Thanks to the team that maintains wireshark. Without its marvelous interface, debugging of bugs in wireformat would be so much more difficult. Thanks to the thousands who participate in the open-source community. I have always developed Net::DNS using open-source systems and I am proud to make Net::DNS freely available to the world. ---- $Id: README 1348 2015-05-27 09:55:13Z willem $