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<h1>A GNU implementation of the Secure Shell protocols</h1>

<tt>lsh</tt> is a free implementation (in the <a
href="http://www.gnu.org/">GNU</a> sense) of the <tt>ssh</tt> version
2 protocol, currently being standardised by the IETF SECSH working
group.<p>

This page should help you find any <tt>lsh</tt> related resources you need.

<h2>Documentation</h2>

The <tt>lsh</tt> source distribution comes with a texinfo manual. You
can also <a href="lsh.html">read the manual online</a>. If you're
interested in hacking <tt>lsh</tt>, make sure to read the
<tt>README</tt> and <tt>doc/HACKING</tt> files in the distribution.

<h2>Infrastructure</h2>

There's a <a
href="http://lists.lysator.liu.se/mailman/listinfo/lsh-bugs">mailing
list</a> you might want to subscribe to. <p>

The CVS server for <tt>lsh</tt> is located at <a
href="http://cvs.lysator.liu.se"><tt>cvs.lysator.liu.se</tt></a>. Both
anonymous pserver access (<tt>cvs -d
:pserver:anonymous@cvs.lysator.liu.se:/cvsroot/lsh co lsh</tt>) and a <a
href="http://cvs.lysator.liu.se/viewcvs/viewcvs.cgi/lsh/?cvsroot=lsh">cvsweb
interface</a> is available.<p>

There's also a <a
href="http://bugzilla.lysator.liu.se/index.cgi">Bugzilla</a> for LSH
bug reports and wanted new features.
 
<h2>Download</h2>

<tt>lsh</tt> uses linux-style version numbers, i.e. 1.2.x, 1.4.x etc are
intended to be stable, while 1.1.x, 1.3.x, 1.5.x etc are development
versions. <p>

<tt>lsh</tt> releases are signed using <a href="http://www.gnupg.org/">GNU
Privacy Guard</a>, with
<a href="http://www.lysator.liu.se/~nisse/archive/distribution-key.gpg">
this public key</a> (HTTP from Sweden, or
 <a href="ftp://ftp.lysator.liu.se/pub/security/lsh/distribution-key.gpg">
 FTP from Sweden</a>)<p>

You can get the latest lsh releases from

<ul>
<li> <a href="http://www.lysator.liu.se/~nisse/archive/">
 http://www.lysator.liu.se/~nisse/archive/</a>
<li> <a href="ftp://ftp.lysator.liu.se/pub/security/lsh">
 ftp://ftp.lysator.liu.se/pub/security/lsh</a>
</ul>

There are also some mirror sites:

<ul>
<li> Australia: <a href="ftp://ftp.wiretapped.net/pub/security/cryptography/app\
s/ssh/lsh/">FTP</a> and <a href="http://the.wiretapped.net/security/cryptograph\
y/apps/ssh/lsh/">HTTP</a>
  (nightly at 0230 local time)
<li> Austria: <a
href="ftp://gd.tuwien.ac.at/utils/shells/lsh/">FTP</a>, <a
href="http://gd.tuwien.ac.at/utils/shells/lsh/">HTTP</a>, and rsync,
<tt>rsync://gd.tuwien.ac.at/utils/shells/lsh/</tt>. Updated daily.
<li> Greece: <a href="ftp://ftp.linux.gr/pub/crypto/lsh">FTP</a>
  (updated daily)
<li> Hungary: <a href="ftp://ftp.kfki.hu/pub/packages/security/ssh/lsh">FTP</a>
  (nightly at 0320 local time)
<li> Netherlands: <a href="http://munitions.vipul.net/software/mirrors/lsh/">
HTTP</a>
</ul><p>

<h2>Related links</h2>

<dl>
<dt> <a href="http://www.macssh.com">MacSSH</a>
<dd> A Mac port of <tt>lsh</tt> by Jean Pierre Stierlin.
<dt> Other free <tt>ssh</tt> programs
<ul>
<li> <a href="http://www.openssh.com/">OpenSSH</a>,
<li> <a href="ftp://ftp.nada.kth.se/pub/krypto/ossh">ossh</a>,
<li> <a href="http://www.fressh.org/">FreSSH</a>,
<li> <a href="http://www.macssh.com/">MacSSH</a>.
<li> <a
href="http://www.chiark.greenend.org.uk/~sgtatham/putty/">PuTTY</a>
<li> <a href="http://www.ganymed.ethz.ch/ssh2/">Ganymed SSH2 for Java</a>
<li> <a href="http://www.sshtools.com">sshtools</a>
</ul>

<dt><a href="http://www.ssh.fi/"><tt>SSH</tt> Communications
Security</a>
<dd>The company making the original (non-free) <tt>ssh</tt> program.

<dt> <a href="http://www.gnupg.org/">GNU Privacy Guard</a>
<dd> A free PGP replacement implementing the IETF's
  <a href="http://www.ietf.org/html.charters/openpgp-charter.html">
  OpenPGP</a> specification.
<dt> <a href="http://www.freeswan.org/">Linux FreeS/WAN</a>
<dd> A project implementing the IETF's
  <a href="http://www.ietf.org/html.charters/ipsec-charter.html">IPSEC
  </a> end-to-end network level encryption for Linux.
<dt> <a href="http://www.openbsd.org/">OpenBSD</a>
<dd>The operating system,
  which ships with IPSEC and OpenSSH as standard since version 2.6.
<dt> <a href="http://www.kerneli.org/">The International Linux Kernel
  Patch</a>
<dd>Adds kernel level support for encryption - e.g. for
  encrypted loopback filesystems.
<dt> <a href="http://www.nrl.navy.mil/CCS/people/kenh/kerberos-faq.html">
<dd> The Kerberos FAQ</a>.
<dt> <a href="http://www.pdc.kth.se/kth-krb/">The eBones Kerberos distribution</a>
<dd> Other Kerberos info at KTH in Sweden.
<dt> <a href="http://www.pdc.kth.se/heimdal/">Heimdal</a>
<dd> A free implementation of Kerberos 5, also from KTH.
<dt> <a href="ftp://ftp.runestig.com/pub/starttls/">START_TLS</a>
<dd> A free <tt>telnet</tt> implementation using the IETF's
  <a href="http://www.ietf.org/html.charters/tls-charter.html">Transport
  Layer Security</a> (TLS) and X.509 certificates for authentication and
  encryption.
<dt> <a href="http://srp.stanford.edu/srp/">SRP</a>
<dd> The Secure Remote
  Password protocol, offers a simpler alternative to Kerberos.
<dt> <a href="http://www.columbia.edu/kermit/">C-Kermit</a>
<dd> Supports Kerberos, SRP and TLS for authentication and encryption.

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