ANNOUNCE 3.77 KB
Newer Older
1
I'm happy to announce a new version of LSH, the GNU implementation of
Niels Möller's avatar
Niels Möller committed
2 3 4
the secure shell protocols. LSH includes a client, a server, and a few
scripts and utility programs.

5 6
The LSH-2.0 release, and any following LSH-2.0.x updates, are intended
to be stable. New features will be added to LSH-2.1.x.
Niels Möller's avatar
Niels Möller committed
7 8 9

FEATURES

10
The most notable changes and new features in LSH-2.0 are:
11

12 13 14
o  Incompatible change to key format, to comply with the latest spki
   structure draft. You can use the script lsh-upgrade to copy and
   convert the information in the old .lsh/known-hosts to the new file
Niels Möller's avatar
Niels Möller committed
15
   .lsh/host-acls, and the script lsh-upgrade-key to convert private
16 17
   keys to the new format. (This change was made between lsh-1.5 and
   lsh-1.5.1).
18

19 20
o  X11 forwarding support in lshd, enabled by default (lsh 
   doesn't ask for X11 forwarding by default).
21

22
o  Several programs have new default behaviour:
23

24
   * lsh-keygen generates RSA rather than DSA keys by default.
25

26 27
   * lsh-writekey encrypts the private key by default, using
     aes256-cbc. Unless the --server flag is used.
28

Niels Möller's avatar
Niels Möller committed
29 30
o  Client support for the "keyboard-interactive" user authentication
   method.
31

32 33
o  SOCKS-style forwarding, using lsh -D. Supports both SOCKS-4 and
   SOCKS-5.
34

35 36 37
o  Support for keyexchange with
   diffie-hellman-group14-sha1/diffie-hellman-group2-sha1 (the
   standardized name is at the moment not decided).
38

39 40 41 42
o  The lsh client no longer sets its stdio file descriptors into
   non-blocking mode, which should avoid a bunch of problems. As a
   consequence, the --cvs-workaround command line option has been
   deleted.
43

44 45 46 47 48 49 50
o  Deleted the --ssh1-fallback option for lshd. I hope ssh1 is dead by
   now; if it isn't, you have to run ssh1d and lshd on different
   ports.
	
o  Deleted code for bug-compatibility with ancient versions of
   Datafellow's SSH2. There are zero bug-compatibility hacks in this
   version.
51

Niels Möller's avatar
Niels Möller committed
52

53
Some of the older (LSH-1.0, LSH-1.2, LSH-1.4) features are
Niels Möller's avatar
Niels Möller committed
54

55 56 57 58
o  Random numbers are generated using the Yarrow pseudorandomness
   generator, which improves security in particular on systems without
   /dev/random. A new program lsh-make-seed is provided for
   initializing the generator.
Niels Möller's avatar
Niels Möller committed
59

60 61
o  AES is now the default cipher. Faster assembler versions are
   included for x86 and sparc.
Niels Möller's avatar
Niels Möller committed
62

63 64 65
o  lshd handles SIGHUP by closing its listening socket, and then
   waiting for existing connections to be closed before exiting. This
   makes it easier to restart lshd in a friendly way.
Niels Möller's avatar
Niels Möller committed
66

67
o  A "gateway" interface, which lets you create a single SSH connection
68 69 70
   to a remote host, and reuse that connection for later commands.
   Ideal for applications like remote CVS.

71 72 73
o  Limited Kerberos support, comparable to that available for the
   original sshd.

74
o  Experimental support for Secure Remote Password (SRP) authentication.
Niels Möller's avatar
Niels Möller committed
75 76 77

o  Experimental support for IPv6.

78
o  A manual.
Niels Möller's avatar
Niels Möller committed
79 80 81 82 83


COMPATIBILITY AND PORTABILITY

LSH implements the secsh protocol as defined by the latest drafts from
84 85 86
the IETF secsh working group, and interoperates with other
implementations, including SSH Inc's SSH2 products and OpenSSH. Note
that LSH is *not* compatible with SSH1.
Niels Möller's avatar
Niels Möller committed
87

Niels Möller's avatar
Niels Möller committed
88
LSH is reported to have worked at least once on GNU/Linux on Sparc,
Niels Möller's avatar
Niels Möller committed
89
Intel, PPC and Alpha, FreeBSD, Solaris and IRIX. There may well be
Niels Möller's avatar
Niels Möller committed
90
portability problems left, please report them to me.
Niels Möller's avatar
Niels Möller committed
91 92 93 94


QUALITY

95
LSH is provided AS IS, ABSOLUTELY NO GUARANTEES, etc. Please report
96
any bugs you find.
Niels Möller's avatar
Niels Möller committed
97 98


Niels Möller's avatar
Niels Möller committed
99
COPYRIGHT
Niels Möller's avatar
Niels Möller committed
100 101

LSH is distributed under the terms and conditions of the GNU General
102
Public License.
Niels Möller's avatar
Niels Möller committed
103 104 105 106


AVAILABILITY AND FURTHER INFORMATION

107 108 109 110
The LSH home page at

  http://www.lysator.liu.se/~nisse/lsh/

Niels Möller's avatar
Niels Möller committed
111 112
The main LSH archive is located at

Niels Möller's avatar
Niels Möller committed
113
  ftp://ftp.lysator.liu.se/pub/security/lsh
Niels Möller's avatar
Niels Möller committed
114

115 116
Discussions about LSH takes place on the lsh-bugs mailing list. See
http://lists.lysator.liu.se/mailman/listinfo/lsh-bugs.
Niels Möller's avatar
Niels Möller committed
117 118 119 120


Happy hacking,
/Niels Möller, <nisse@lysator.liu.se>