which are the exact effects of MaxSessions

Christoph Anton Mitterer calestyo at scientia.net
Fri Feb 20 12:51:29 AEDT 2015


I wondered a bit which the exact effects of MaxSessions are.

The documentation says:
        Specifies the maximum number of open sessions permitted per net‐
        work connection.  The default is 10.

And it apparently seems that setting e.g. the following in sshd_config:
  MaxSessions 0
     => no logins possible at all

  MaxSessions 1
     => control channel muxing basically forbidden from the server side

  MaxSessions n
     => at most n sessions may use a mux, including the one which
        initiated it
        but further muxes (with again n session) may be created by that

Is it just that? Or are there any other side effects which I can't see?


btw: Would be nice if something like the above could be added to the
manpage for clraification :)

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