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sshconnectionchanneltransferopenssh

Is it possible to query the max number of channels available in an ssh connection?

I'm using ssh to connect to a server (really a cluster, but that's not important) and to transfer files to it. There seems to be a hard limit (9 in this case) of channels that can be used in one ssh connection.

Does the ssh protocol have a mechanism for querying the max number of channels available per ssh connection?

Solution

  • No, there is no way to query the maximum amount of channels available. The protocol is described in PROTOCOL.mux.

    The server can limit the amount of multiplexed sessions (MaxSessions in sshd_config), but not the amount of the channels.