INN as a whole and all code contained in it not otherwise marked with different licenses and/or copyrights is covered by the following copyright and license: Copyright (c) 2004, 2005, 2006, 2007, 2008 by Internet Systems Consortium, Inc. ("ISC") Copyright (c) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 by The Internet Software Consortium and Rich Salz This code is derived from software contributed to the Internet Software Consortium by Rich Salz. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. Some specific portions of INN are covered by different licenses. Those licenses, if present, will be noted prominantly at the top of those source files. Specifically (but possibly not comprehensively): authprogs/smbval/*, backends/send-uucp.in, and control/perl-nocem.in are under the GNU General Public License. See doc/GPL for a copy of this license. backends/shrinkfile.c, frontends/scanspool.in, lib/concat.c, lib/hstrerror.c, lib/inet_aton.c, lib/inet_ntoa.c, lib/memcmp.c, lib/parsedate.y, lib/pread.c, lib/pwrite.c, lib/setenv.c, lib/seteuid.c, lib/strerror.c, lib/strlcat.c and lib/strlcpy.c are in the public domain. lib/snprintf.c may be used for any purpose as long as the author's notice remains intact in all source code distributions. control/gpgverify.in, control/pgpverify.in and control/signcontrol.in are under a BSD-style license (with the advertising clause) with UUNET Technologies, Inc. as the copyright holder. See the end of those files for details. control/controlchan.in and control/modules/*.pl are covered by a two-clause BSD-style license (no advertising clause). See the beginning of those files for details. lib/strcasecmp.c, lib/strspn.c, and lib/strtok.c are taken from BSD sources and are covered by the standard BSD license. See those files for more details. lib/md5.c is covered under the standard free MD5 license from RSA Data Security. See the file for more details. A clarification is also provided here: . "Implementations of these message-digest algorithms, including implementations derived from the reference C code in RFC-1319, RFC-1320, and RFC-1321, may be made, used, and sold without license from RSA for any purpose." history/his.c and history/hisv6/hisv6.c are under a license very similar to the new BSD license (no advertising clause) but with Thus plc as the copyright holder. See those files for details. lib/tst.c, include/inn/tst.h and doc/pod/tst.pod are derived from and are under the new BSD license (no advertising clause), but with Peter A. Friend as the copyright holder. tests/runtests.c is covered under a license very similar to the MIT/X Consortium license. See the beginning of the file for details. Note that all portions of INN that link with core INN code have to be covered by licenses compatible with the license at the top of this file, and since INN links with several external libraries if so configured (such as OpenSSL), should also be compatible with the licenses of those external libraries to be safe. Some portions of this distribution are covered by more restrictive licenses, but all of that code is completely stand-alone, either as a standalone script or as code that compiles into a separate executable. Please note that the files in the contrib directory are not properly part of INN and may be under widely varying licenses. Please see each file and/or its documentation for license information.