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Fix new poll() code for helper pipe. Removed CPU-spin.
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2<HEAD>
7e22cf28 3<TITLE> Dnsmasq - network services for small networks.</TITLE>
933878f2 4<link rel="icon" href="http://www.thekelleys.org.uk/dnsmasq/images/favicon.ico">
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6<BODY BGCOLOR="WHITE">
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7<table width="100%" border="0" cellpadding="0" cellspacing="0">
8<tr>
9<td align="left" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td>
10<td align="middle" valign="middle"><h1>Dnsmasq</h1></td>
11<td align="right" valign="middle"><img border="0" src="http://www.thekelleys.org.uk/dnsmasq/images/icon.png" /></td></tr>
12</table>
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13Dnsmasq provides network infrastructure for small networks: DNS, DHCP, router advertisement and network boot. It is designed to be
14lightweight and have a small footprint, suitable for resource constrained routers and firewalls. It has also been widely used
15for tethering on smartphones and portable hotspots, and to support virtual networking in virtualisation frameworks.
16Supported platforms include Linux (with glibc and uclibc), Android, *BSD, and Mac OS X. Dnsmasq is included in most
17Linux distributions and the ports systems of FreeBSD, OpenBSD and NetBSD. Dnsmasq provides full IPv6 support.
28866e95 18
9e4abcb5 19<P>
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20The DNS subsystem provides a local DNS server for the network, with forwarding of all query types to upstream recursive DNS servers and
21cacheing of common record types (A, AAAA, CNAME and PTR, also DNSKEY and DS when DNSSEC is enabled).
22<DIR>
23<LI>Local DNS names can be defined by reading /etc/hosts, by importing names from the DHCP subsystem, or by configuration of a wide range of useful record types.</LI>
24<LI>Upstream servers can be configured in a variety of convenient ways, including dynamic configuration as these change on moving upstream network.
25<LI>Authoritative DNS mode allows local DNS names may be exported to zone in the global DNS. Dnsmasq acts as authoritative server for this zone, and also provides
26zone transfer to secondaries for the zone, if required.</LI>
27<LI>DNSSEC validation may be performed on DNS replies from upstream nameservers, providing security against spoofing and cache poisoning.</LI>
28<LI>Specified sub-domains can be directed to their own upstream DNS servers, making VPN configuration easy.</LI>
29<LI>Internationalised domain names are supported.
30</DIR>
9e4abcb5 31<P>
7e22cf28 32The DHCP subsystem supports DHCPv4, DHCPv6, BOOTP and PXE.
9e4abcb5 33<DIR>
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34<LI> Both static and dynamic DHCP leases are supported, along with stateless mode in DHCPv6.</LI>
35<LI> The PXE system is a full PXE server, supporting netboot menus and multiple architecture support. It
36includes proxy-mode, where the PXE system co-operates with another DHCP server.</LI>
37<LI> There is a built in read-only TFTP server to support netboot.</LI>
38<LI> Machines which are configured by DHCP have their names automatically
26128d27 39included in the DNS and the names can specified by each machine or
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40centrally by associating a name with a MAC address or UID in the dnsmasq
41configuration file.</LI>
9e4abcb5 42</DIR>
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43<P>
44The Router Advertisement subsystem provides basic autoconfiguration for IPv6 hosts. It can be used stand-alone or in conjunction with DHCPv6.
45<DIR>
46<LI> The M and O bits are configurable, to control hosts' use of DHCPv6.</LI>
47<LI> Router advertisements can include the RDNSS option.</LI>
48<LI> There is a mode which uses name information from DHCPv4 configuration to provide DNS entries
49 for autoconfigured IPv6 addresses which would otherwise be anonymous.</LI>
50</DIR>
51<P>
52
53For extra compactness, unused features may be omitted at compile time.
54
9e4abcb5 55
246839d6 56<H2>Get code.</H2>
9e4abcb5 57
246839d6 58<A HREF="http://www.thekelleys.org.uk/dnsmasq/">Download</A> dnsmasq here.
4011c4e0 59The tarball includes this documentation, source, and manpage.
832af0ba 60There is also a <A HREF="CHANGELOG"> CHANGELOG</A> and a <A HREF="FAQ">FAQ</A>.
9e4abcb5 61
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62Dnsmasq has a git repository which contains the complete release
63history of version 2 and development history from 2.60. You can
64<A HREF="http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=summary">browse</A>
65the repo, or get a copy using git protocol with the command
66
67<PRE><TT>git clone git://thekelleys.org.uk/dnsmasq.git </TT></PRE>
68
9e4abcb5 69<H2>License.</H2>
7e22cf28 70Dnsmasq is distributed under the GPL, version 2 or version 3 at your discretion. See the files COPYING and COPYING-v3 in the distribution
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71for details.
72
73<H2>Contact.</H2>
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74There is a dnsmasq mailing list at <A
75HREF="http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss">
76http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss</A> which should be the
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77first location for queries, bugreports, suggestions etc. The list is mirrored, with a
78search facility, at <A HREF="https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/">
79https://www.mail-archive.com/dnsmasq-discuss@lists.thekelleys.org.uk/</A>.
7e22cf28 80You can contact me at <A
26128d27 81HREF="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</A>.
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82
83<H2>Donations.</H2>
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84Dnsmasq is mainly written and maintained by Simon Kelley. For most of its life, dnsmasq has been a spare-time project.
85These days I'm working on it as my main activity.
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86I don't have an employer or anyone who pays me regularly to work on dnsmasq. If you'd like to make
87a contribution towards my expenses, please use the donation button below.
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