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Bug#471437: option to prevent going via master control socket

Package: openssh-client
Version: 1:4.7p1-4
Severity: wishlist

I have a master connection to most of the machines with which
I deal. Every now and then, I need X forwarding or SSH Agent
forwarding, but there is no way to connect to the machine (other
than through IP or a host alias not in .ssh/config) without going
via the control socket. -o ControlMaster=no doesn't work, and
neither does -S /dev/null.

It would be nice if the -M option could be extended to invert its
meaning when ControlMaster is turned on already:

                          -              -M              -MM
ControlMaster off         direct         master          master
ControlMaster on          master         direct          direct
ControlMaster auto        master*        direct          masterask*/direct

as far as I can tell, this would be compatible with the current
behaviour (provided ControlMaster is off), but it would also allow
single connections to go directly, even if ControlMaster is on.

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.24-1-amd64 (SMP w/1 CPU core)
Locale: LANG=en_GB, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages openssh-client depends on:
ii  adduser               3.106              add and remove users and groups
ii  debconf [debconf-2.0] 1.5.20             Debian configuration management sy
ii  dpkg                  package maintenance system for Deb
ii  libc6                 2.7-9              GNU C Library: Shared libraries
ii  libcomerr2            1.40.8-2           common error description library
ii  libedit2              2.9.cvs.20050518-4 BSD editline and history libraries
ii  libkrb53              1.6.dfsg.3~beta1-3 MIT Kerberos runtime libraries
ii  libncurses5           5.6+20080203-1     Shared libraries for terminal hand
ii  libssl0.9.8           0.9.8g-7           SSL shared libraries
ii  passwd                1:4.1.0-2          change and administer password and
ii  zlib1g                1:  compression library - runtime

openssh-client recommends no packages.

-- no debconf information

 .''`.   martin f. krafft <madduck@debian.org>
: :'  :  proud Debian developer, author, administrator, and user
`. `'`   http://people.debian.org/~madduck - http://debiansystem.info
  `-  Debian - when you have better things to do than fixing systems

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