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DNSMASQ(8)                           System Manager's Manual                           DNSMASQ(8)

NAME
       dnsmasq - A lightweight DHCP and caching DNS server.

SYNOPSIS
       dnsmasq [OPTION]...

DESCRIPTION
       dnsmasq  is  a  lightweight  DNS,  TFTP,  PXE, router advertisement and DHCP server. It is
       intended to provide coupled DNS and DHCP service to a LAN.

       Dnsmasq accepts DNS queries and either answers them from a small, local, cache or forwards
       them  to  a real, recursive, DNS server. It loads the contents of /etc/hosts so that local
       hostnames which do not appear in the global DNS can  be  resolved  and  also  answers  DNS
       queries for DHCP configured hosts. It can also act as the authoritative DNS server for one
       or more domains, allowing local names to appear in the global DNS. It can be configured to
       do DNSSEC validation.

       The  dnsmasq  DHCP  server  supports  static address assignments and multiple networks. It
       automatically sends a sensible default set of DHCP options, and can be configured to  send
       any  desired  set  of  DHCP  options, including vendor-encapsulated options. It includes a
       secure, read-only, TFTP server to allow net/PXE boot  of  DHCP  hosts  and  also  supports
       BOOTP.  The  PXE  support  is  full featured, and includes a proxy mode which supplies PXE
       information to clients whilst DHCP address allocation is done by another server.

       The dnsmasq DHCPv6 server provides the same set of features as the DHCPv4 server,  and  in
       addition,  it  includes  router advertisements and a neat feature which allows nameing for
       clients which use DHCPv4 and stateless  autoconfiguration  only  for  IPv6  configuration.
       There  is support for doing address allocation (both DHCPv6 and RA) from subnets which are
       dynamically delegated via DHCPv6 prefix delegation.

       Dnsmasq is coded with small embedded systems in mind. It aims for  the  smallest  possible
       memory footprint compatible with the supported functions,  and allows uneeded functions to
       be omitted from the compiled binary.

OPTIONS
       Note that in general missing parameters are allowed and switch off functions, for instance
       "--pid-file" disables writing a PID file. On BSD, unless the GNU getopt library is linked,
       the long form of the options does not work on the command line; it is still recognised  in
       the configuration file.

       --test Read  and  syntax  check configuration file(s). Exit with code 0 if all is OK, or a
              non-zero code otherwise. Do not start up dnsmasq.

       -h, --no-hosts
              Don't read the hostnames in /etc/hosts.

       -H, --addn-hosts=
              Additional hosts file. Read the specified file as well  as  /etc/hosts.  If  -h  is
              given,  read only the specified file. This option may be repeated for more than one
              additional hosts file. If a directory is given, then read all the  files  contained
              in that directory.

       --hostsdir=
              Read  all the hosts files contained in the directory. New or changed files are read
              automatically. See --dhcp-hostsdir for details.

       -E, --expand-hosts
              Add the domain to simple names (without a period) in /etc/hosts in the same way  as
              for  DHCP-derived  names.  Note that this does not apply to domain names in cnames,
              PTR records, TXT records etc.

       -T, --local-ttl=

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