Projects / Portable OpenSSH

Portable OpenSSH

Portable OpenSSH is a Unix/Linux port of OpenBSD's excellent OpenSSH, a full implementation of the SSH1 and SSH2 protocols. It includes sftp client and server support.

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RSS Recent releases

Release Notes: This release added experimental sandboxing of network-facing code during the pre-authentication phase and SHA2-based HMAC modes for the SSH transport. sshd now sends logs from the privilege-separated process via a pipe, eliminating the need for /var/empty/dev/log. There were many more bugfixes and changes.

  •  24 Jan 2011 03:43

    Release Notes: ECC support for kex exchange and public key authentication, SFTP hard link support, improved QoS/DSCP support, bandwidth limiting for SFTP, and more.

    •  08 Mar 2010 12:30

    Release Notes: This is a major feature and bugfix release. Major changes include disabling SSH protocol 1 by default, removal of legacy OpenSC/libsectok smartcard support, addition of PKCS#11 support, introduction of a new certificate authentication method for users and hosts, revised session multiplexing code, many improvements to sftp from the Google Summer of Code 2009, and lots of bugfixes.

    Release Notes: Many bugs were fixed. Performance and features were improved.

    •  30 Mar 2008 22:28

    Release Notes: Execution of ~/.ssh/rc was disabled for sessions where a command has been forced by the sshd_config ForceCommand directive (unsafe default behavior). Chroot support for sshd was added. Internal sftp-server support was added to sshd, to allow chroot operation without support files. A "no-user-rc" option was added to ~/.ssh/authorized_keys to disable execution of ~/.ssh/rc in public key authentication. An sftp protocol extension, "posix-rename@openssh.com", was added to provide a rename operation with POSIX semantics.

    RSS Recent comments

    25 Jun 2003 14:55 jrjohns3

    Security Blanket
    This is one of the most important apps on my machine. I don't know why everyone doesn't use it. I fear telnet....

    Regards,

    jake@plutoid.com (www.plutoid.com)
    www.plutoid.com (www.plutoid.com)

    06 Dec 2001 07:41 LosD

    Re: file format of DSA keys

    > Hmmm... Looking at the manpage, neither
    > -d or -x exists...
    >
    >

    Hmmm.... But they still work...

    06 Dec 2001 07:33 LosD

    Re: file format of DSA keys
    Hmmm... Looking at the manpage, neither -d or -x exists...

    28 Feb 2001 09:52 mossc

    Re: file format of DSA keys

    > OpenSSH uses PEM format for DSA key
    > files which is incompatible with the
    > SSH2 key file format. So far I couldn't
    > get OpenSSH to authenticate with a DSA
    > key to an ssh2 server because of this.
    > I can't put the public key generated
    > with OpenSSH on the ssh2 server and I
    > can't get OpenSSH to use a private key
    > generated with ssh-keygen2.
    >

    From my notes here is how I was able to do it:

    On the client

    1. upgrade the openssh to 2.2.x+

    2. ssh-keygen -d -f $HOME/.ssh/id_dsa

    3. cd $HOME/.ssh

    4. ssh-keygen -x -f $HOME/.ssh/id_dsa > ssh2.pub

    On fsecure server

    5. copy ssh2.pub to $HOME/.ssh2/ssh2.pub

    6. echo "Key ssh2.pub" > authorization

    11 May 2000 15:06 orentirosh

    file format of DSA keys
    OpenSSH uses PEM format for DSA key files which is incompatible with the SSH2 key file format. So far I couldn't get OpenSSH to authenticate with a DSA key to an ssh2 server because of this. I can't put the public key generated with OpenSSH on the ssh2 server and I can't get OpenSSH to use a private key generated with ssh-keygen2.

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