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. The software was renamed to nss-pam-ldapd when PAM code contributed by Howard Chu for the OpenLDAP nssov module was integrated. Solaris compatibility was developed by Ted C. Cheng of Symas Corporation. https://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) 2006-2019 Arthur de Jong Copyright (C) 2009 Howard Chu Copyright (C) 2010 Symas Corporation 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: common/expr.c: Copyright (C) 2012 Thorsten Glaser common/expr.c: Copyright (C) 2016 Giovanni Mascellani compat/pagectrl.c: Copyright (C) 2002 Max Caines debian/po/ca.po: Copyright (C) 2004 Free Software Foundation, Inc. debian/po/da.po: Copyright (C) 2008 Jonas Smedegaard debian/po/da.po: Copyright (C) 2010, 2011, 2013, 2014 Joe Hansen debian/po/de.po: Copyright (C) 2004 Erik Schanze debian/po/es.po: Copyright (C) 2007 Rudy Godoy Guillén debian/po/es.po: Copyright (C) 2009, 2010, 2011 Software in the Public Interest debian/po/fi.po: Copyright (C) 2009 Esko Arajärvi debian/po/fr.po: Copyright (C) 2007, 2009, 2010 Debian French l10n team debian/po/it.po: Copyright (C) 2013 Beatrice Torracca debian/po/pl.po: Copyright (C) 2013, 2014 Michał Kułach debian/po/pt.po: Copyright (C) 2007-2014 Américo Monteiro debian/po/sv.po: Copyright (C) 2011, 2013, 2014 Martin Bagge debian/po/tr.po: Copyright (C) 2012, 2013 Atila KOÇ debian/po/vi.po: Copyright (C) 2010 Free Software Foundation, Inc. nslcd/group.c: Copyright (C) 2013 Steve Hill nslcd/pam.c: Copyright (C) 2015 Nokia Solutions and Networks nss/bsdnss.c: Copyright (C) 2003 Jacques Vidrine nss/bsdnss.c: Copyright (C) 2006 Artem Kazakov nss/bsdnss.c: Copyright (C) 2009 Alexander V. 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