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README for Unbound 1.6.6 Copyright 2007 NLnet Labs http://unbound.net This software is under BSD license, see LICENSE for details. The DNS64 module has BSD license in dns64/dns64.c. The DNSTAP code has BSD license in dnstap/dnstap.c. * Download the latest release version of this software from http://unbound.net or get a beta version from the svn repository at http://unbound.net/svn/ * Uses the following libraries; * libevent http://www.monkey.org/~provos/libevent/ (BSD license) (optional) can use builtin alternative instead. * libexpat (for the unbound-anchor helper program) (MIT license) * Make and install: ./configure; make; make install * --with-libevent=/path/to/libevent Can be set to either the system install or the build directory. --with-libevent=no (default) gives a builtin alternative implementation. libevent is useful when having many (thousands) of outgoing ports. This improves randomization and spoof resistance. For the default of 16 ports the builtin alternative works well and is a little faster. * --with-libexpat=/path/to/libexpat Can be set to the install directory of libexpat. * --without-pthreads This disables pthreads. Without this option the pthreads library is detected automatically. Use this option to disable threading altogether, or, on Solaris, also use --with(out)-solaris-threads. * --enable-checking This enables assertions in the code that guard against a variety of programming errors, among which buffer overflows. The program exits with an error if an assertion fails (but the buffer did not overflow). * --enable-static-exe This enables a debug option to statically link against the libevent library. * --enable-lock-checks This enables a debug option to check lock and unlock calls. It needs a recent pthreads library to work. * --enable-alloc-checks This enables a debug option to check malloc (calloc, realloc, free). The server periodically checks if the amount of memory used fits with the amount of memory it thinks it should be using, and reports memory usage in detail. * --with-conf-file=filename Set default location of config file, the default is /usr/local/etc/unbound/unbound.conf. * --with-pidfile=filename Set default location of pidfile, the default is /usr/local/etc/unbound/unbound.pid. * --with-run-dir=path Set default working directory, the default is /usr/local/etc/unbound. * --with-chroot-dir=path Set default chroot directory, the default is /usr/local/etc/unbound. * --with-rootkey-file=path Set the default root.key path. This file is read and written. the default is /usr/local/etc/unbound/root.key * --with-rootcert-file=path Set the default root update certificate path. A builtin certificate is used if this file is empty or does not exist. the default is /usr/local/etc/unbound/icannbundle.pem * --with-username=user Set default user name to change to, the default is the "unbound" user. * --with-pyunbound Create libunbound wrapper usable from python. Needs python-devel and swig development tools. * --with-pythonmodule Compile the python module that processes responses in the server. * --disable-sha2 Disable support for RSASHA256 and RSASHA512 crypto. * --disable-gost Disable support for GOST crypto, RFC 5933. * 'make test' runs a series of self checks. Known issues ------------ o If there are no replies for a forward or stub zone, for a reverse zone, you may need to add a local-zone: name transparent or nodefault to the server: section of the config file to unblock the reverse zone. Only happens for (sub)zones that are blocked by default; e.g. 10.in-addr.arpa o If libevent is older (before 1.3c), unbound will exit instead of reload on sighup. On a restart 'did not exit gracefully last time' warning is printed. Perform ./configure --with-libevent=no or update libevent, rerun configure and recompile unbound to make sighup work correctly. It is strongly suggested to use a recent version of libevent. o If you are not receiving the correct source IP address on replies (e.g. you are running a multihomed, anycast server), the interface-automatic option can be enabled to set socket options to achieve the correct source IP address on UDP replies. Listing all IP addresses explicitly in the config file is an alternative. The interface-automatic option uses non portable socket options, Linux and FreeBSD should work fine. o The warning 'openssl has no entropy, seeding with time', with chroot enabled, may be solved with a symbolic link to /dev/random from <chrootdir>. o On Solaris 5.10 some libtool packages from repositories do not work with gcc, showing errors gcc: unrecognized option `-KPIC' To solve this do ./configure libtool=./libtool [your options...]. On Solaris you may pass CFLAGS="-xO4 -xtarget=generic" if you use sun-cc. o If unbound-control (or munin graphs) do not work, this can often be because the unbound-control-setup script creates the keys with restricted permissions, and the files need to be made readable or ownered by both the unbound daemon and unbound-control. o Crosscompile seems to hang. You tried to install unbound under wine. wine regedit and remove all the unbound entries from the registry or delete .wine/drive_c. Acknowledgements ---------------- o Unbound was written in portable C by Wouter Wijngaards (NLnet Labs). o Thanks to David Blacka and Matt Larson (Verisign) for the unbound-java prototype. Design and code from that prototype has been used to create this program. Such as the iterator state machine and the cache design. o Other code origins are from the NSD (NLnet Labs) and LDNS (NLnet Labs) projects. Such as buffer, region-allocator and red-black tree code. o See Credits file for contributors. Your Support ------------ NLnet Labs offers all of its software products as open source, most are published under a BSD license. You can download them, not only from the NLnet Labs website but also through the various OS distributions for which NSD, ldns, and Unbound are packaged. We therefore have little idea who uses our software in production environments and have no direct ties with 'our customers'. Therefore, we ask you to contact us at users@NLnetLabs.nl and tell us whether you use one of our products in your production environment, what that environment looks like, and maybe even share some praise. We would like to refer to the fact that your organization is using our products. We will only do that if you explicitly allow us. In all other cases we will keep the information you share with us to ourselves. In addition to the moral support you can also support us financially. NLnet Labs is a recognized not-for-profit charity foundation that is chartered to develop open-source software and open-standards for the Internet. If you use our software to satisfaction please express that by giving us a donation. For small donations PayPal can be used. For larger and regular donations please contact us at users@NLnetLabs.nl. Also see http://www.nlnetlabs.nl/labs/contributors/. * mailto:unbound-bugs@nlnetlabs.nl