Hi all.
I've put together a release for Dropbear 0.52. It mostly has
new features, as well as a few bugfixes.
The client has gained a few new additions including the
ability to "onion-route" through a few SSH servers, all
established from the local host. Performance connecting to
an OpenSSH server with dbclient should improve now that
the [EMAIL PROTECTED] compression mode is supported.
The website http:/matt.ucc.asn.au/dropbear/dropbear.html
has releases as usual.
Matt
0.52 - Wed 12 November 2008
- Add "netcat-alike" option (-B) to dbclient, allowing Dropbear to tunnel
standard input/output to a TCP port-forwarded remote host.
- Add "proxy command" support to dbclient, to allow using a spawned process for
IO rather than a direct TCP connection. eg
dbclient remotehost
is equivalent to
dbclient -J 'nc remotehost 22' remotehost
(the hostname is still provided purely for looking up saved host keys)
- Combine netcat-alike and proxy support to allow "multihop" connections, with
comma-separated host syntax. Allows running
dbclient [EMAIL PROTECTED],[EMAIL PROTECTED],[EMAIL PROTECTED]
to end up at host3 via the other two, using SSH TCP forwarding. It's a bit
like onion-routing. All connections are established from the local machine.
The comma-separated syntax can also be used for scp/rsync, eg
rsync -a -e dbclient [EMAIL PROTECTED],[EMAIL
PROTECTED],martello:/home/matt/ ~/backup/
to bounce through a few hosts.
- Add -I "idle timeout" option (contributed by Farrell Aultman)
- Allow restrictions on authorized_keys logins such as restricting commands
to be run etc. This is a subset of those allowed by OpenSSH, doesn't
yet allow restricting source host.
- Use vfork() for scp on uClinux
- Default to PATH=/usr/bin:/bin for shells.
- Report errors if -R forwarding fails
- Add counter mode cipher support, which avoids some security problems with the
standard CBC mode.
- Support [EMAIL PROTECTED] delayed compression for client/server. It can be
required for the Dropbear server with the '-Z' option. This is useful for
security as it avoids exposing the server to attacks on zlib by
unauthenticated remote users, though requires client side support.
- options.h has been split into options.h (user-changable) and sysoptions.h
(less commonly changed)
- Support "dbclient -s sftp" to specify a subsystem
- Fix a bug in replies to channel requests that could be triggered by recent
versions of PuTTY
