This is nss-pam-ldapd, a library for doging NSS and PAM lookups using an LDAP server. nss-pam-ldapd started as nss-ldapd which was a fork from nss_ldap which was originally written by Luke Howard of PADL Software Pty Ltd. http://www.padl.com/OSS/nss_ldap.html In 2006 Arthur de Jong of West Consuling forked the library to split it into a thin NSS part and a server part. Most of the code was rewritten. http://arthurdejong.org/nss-pam-ldapd/ Arthur de Jong is both the upstream and Debian package maintainer, so there are no differences between the Debian package and the upstream version. The Debian package of nss-pam-ldapd was partially based on packaging of the libnss-ldap package. The libnss-ldap package was maintained by Ben Collins, Davide Puricelli (evo), Sami Haahtinen and Stephen Frost. Copyright (C) 1997-2006 Luke Howard Copyright (C) 2006-2007 West Consulting Copyright (C) 2006-2009 Arthur de Jong Copyright (C) 2009 Howard Chu This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. On Debian GNU/Linux systems, the complete text of the GNU Lesser General Public License can be found in /usr/share/common-licenses/LGPL-2.1. The following files are also contain other copyright holders and are also covered by the GNU Lesser General Public License: compat/pagectrl.c: Copyright (C) 2002 Max Caines debian/po/da.po: Copyright (C) 2008 Jonas Smedegaard debian/po/ca.po: Copyright (C) 2004 Free Software Foundation, Inc. debian/po/es.po: Copyright (C) 2007 Rudy Godoy Guillén debian/po/de.po: Copyright (C) 2004 Erik Schanze debian/po/fr.po: Copyright (C) 2007 Cyril Brulebois debian/po/fr.po: Copyright (C) 2007 Philippe Batailler debian/po/pt.po: Copyright (C) 2007 Américo Monteiro debian/po/vi.po: Copyright (C) 2005 Free Software Foundation, Inc. The distribution includes code from the Autoconf and Automake suites. This code is either licensed under the GNU General Public License with the extra permission to use it in a configure script under the licensing terms of that configure script or gives unlimited permission to copy and/or distribute it with or without modifications. The code is Copyright (C) 1996-2007 Free Software Foundation, Inc. (years aggregated). The file m4/acx_pthread.m4 contains the following copyright statement: Copyright (c) 2007 Steven G. Johnson This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . As a special exception, the respective Autoconf Macro's copyright owner gives unlimited permission to copy, distribute and modify the configure scripts that are the output of Autoconf when processing the Macro. You need not follow the terms of the GNU General Public License when using or distributing such scripts, even though portions of the text of the Macro appear in them. The GNU General Public License (GPL) does govern all other use of the material that constitutes the Autoconf Macro. This special exception to the GPL applies to versions of the Autoconf Macro released by the Autoconf Macro Archive. When you make and distribute a modified version of the Autoconf Macro, you may extend this special exception to the GPL to apply to your modified version as well.