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