1README for Unbound 1.19.3 2Copyright 2007 NLnet Labs 3http://unbound.net 4 5This software is under BSD license, see LICENSE for details. 6The DNS64 module has BSD license in dns64/dns64.c. 7The DNSTAP code has BSD license in dnstap/dnstap.c. 8 9* Download the latest release version of this software from 10 http://unbound.net 11 or get a beta version from the svn repository at 12 http://unbound.net/svn/ 13 14* Uses the following libraries; 15 * libevent http://www.monkey.org/~provos/libevent/ (BSD license) 16 (optional) can use builtin alternative instead. 17 * libexpat (for the unbound-anchor helper program) (MIT license) 18 19* Make and install: ./configure; make; make install 20 * --with-libevent=/path/to/libevent 21 Can be set to either the system install or the build directory. 22 --with-libevent=no gives a builtin alternative implementation. 23 Libevent is enabled by default, it is useful when having many 24 (thousands) of outgoing ports. This improves randomization and spoof 25 resistance. It also allows a higher number of outgoing queries. 26 * --with-libexpat=/path/to/libexpat 27 Can be set to the install directory of libexpat. 28 * --without-pthreads 29 This disables pthreads. Without this option the pthreads library 30 is detected automatically. Use this option to disable threading 31 altogether, or, on Solaris, also use --with(out)-solaris-threads. 32 * --enable-checking 33 This enables assertions in the code that guard against a variety of 34 programming errors, among which buffer overflows. The program exits 35 with an error if an assertion fails (but the buffer did not overflow). 36 * --enable-static-exe 37 This enables a debug option to statically link against the 38 libevent library. 39 * --enable-lock-checks 40 This enables a debug option to check lock and unlock calls. It needs 41 a recent pthreads library to work. 42 * --enable-alloc-checks 43 This enables a debug option to check malloc (calloc, realloc, free). 44 The server periodically checks if the amount of memory used fits with 45 the amount of memory it thinks it should be using, and reports 46 memory usage in detail. 47 * --with-conf-file=filename 48 Set default location of config file, 49 the default is /usr/local/etc/unbound/unbound.conf. 50 * --with-pidfile=filename 51 Set default location of pidfile, 52 the default is /usr/local/etc/unbound/unbound.pid. 53 * --with-run-dir=path 54 Set default working directory, 55 the default is /usr/local/etc/unbound. 56 * --with-chroot-dir=path 57 Set default chroot directory, 58 the default is /usr/local/etc/unbound. 59 * --with-rootkey-file=path 60 Set the default root.key path. This file is read and written. 61 the default is /usr/local/etc/unbound/root.key 62 * --with-rootcert-file=path 63 Set the default root update certificate path. A builtin certificate 64 is used if this file is empty or does not exist. 65 the default is /usr/local/etc/unbound/icannbundle.pem 66 * --with-username=user 67 Set default user name to change to, 68 the default is the "unbound" user. 69 * --with-pyunbound 70 Create libunbound wrapper usable from python. 71 Needs python-devel and swig development tools. 72 * --with-pythonmodule 73 Compile the python module that processes responses in the server. 74 * --disable-sha2 75 Disable support for RSASHA256 and RSASHA512 crypto. 76 * --disable-gost 77 Disable support for GOST crypto, RFC 5933. 78 * --enable-subnet 79 Enable EDNS client subnet processing. 80 81* 'make test' runs a series of self checks. 82 83Known issues 84------------ 85o If there are no replies for a forward or stub zone, for a reverse zone, 86 you may need to add a local-zone: name transparent or nodefault to the 87 server: section of the config file to unblock the reverse zone. 88 Only happens for (sub)zones that are blocked by default; e.g. 10.in-addr.arpa 89o If libevent is older (before 1.3c), unbound will exit instead of reload 90 on sighup. On a restart 'did not exit gracefully last time' warning is 91 printed. Perform ./configure --with-libevent=no or update libevent, rerun 92 configure and recompile unbound to make sighup work correctly. 93 It is strongly suggested to use a recent version of libevent. 94o If you are not receiving the correct source IP address on replies (e.g. 95 you are running a multihomed, anycast server), the interface-automatic 96 option can be enabled to set socket options to achieve the correct 97 source IP address on UDP replies. Listing all IP addresses explicitly in 98 the config file is an alternative. The interface-automatic option uses 99 non portable socket options, Linux and FreeBSD should work fine. 100o The warning 'openssl has no entropy, seeding with time', with chroot 101 enabled, may be solved with a symbolic link to /dev/urandom from <chrootdir>. 102o On Solaris 5.10 some libtool packages from repositories do not work with 103 gcc, showing errors gcc: unrecognized option `-KPIC' 104 To solve this do ./configure libtool=./libtool [your options...]. 105 On Solaris you may pass CFLAGS="-xO4 -xtarget=generic" if you use sun-cc. 106o If unbound-control (or munin graphs) do not work, this can often be because 107 the unbound-control-setup script creates the keys with restricted 108 permissions, and the files need to be made readable or ownered by both the 109 unbound daemon and unbound-control. 110o Crosscompile seems to hang. You tried to install unbound under wine. 111 wine regedit and remove all the unbound entries from the registry or 112 delete .wine/drive_c. 113 114Acknowledgements 115---------------- 116o Unbound was written in portable C by Wouter Wijngaards (NLnet Labs). 117o Thanks to David Blacka and Matt Larson (Verisign) for the unbound-java 118 prototype. Design and code from that prototype has been used to create 119 this program. Such as the iterator state machine and the cache design. 120o Other code origins are from the NSD (NLnet Labs) and LDNS (NLnet Labs) 121 projects. Such as buffer, region-allocator and red-black tree code. 122o See Credits file for contributors. 123 124 125Your Support 126------------ 127NLnet Labs offers all of its software products as open source, most are 128published under a BSD license. You can download them, not only from the 129NLnet Labs website but also through the various OS distributions for 130which NSD, ldns, and Unbound are packaged. We therefore have little idea 131who uses our software in production environments and have no direct ties 132with 'our customers'. 133 134Therefore, we ask you to contact us at users@NLnetLabs.nl and tell us 135whether you use one of our products in your production environment, 136what that environment looks like, and maybe even share some praise. 137We would like to refer to the fact that your organization is using our 138products. We will only do that if you explicitly allow us. In all other 139cases we will keep the information you share with us to ourselves. 140 141In addition to the moral support you can also support us 142financially. NLnet Labs is a recognized not-for-profit charity foundation 143that is chartered to develop open-source software and open-standards 144for the Internet. If you use our software to satisfaction please express 145that by giving us a donation. For small donations PayPal can be used. For 146larger and regular donations please contact us at users@NLnetLabs.nl. Also 147see http://www.nlnetlabs.nl/labs/contributors/. 148 149 150* mailto:unbound-bugs@nlnetlabs.nl 151