https://bugzilla.mindrot.org/show_bug.cgi?id=3175
Bug ID: 3175
Summary: ssh_config(5) - ProxyCommand should explain semantics
Product: Portable OpenSSH
Version: 8.3p1
Hardware: Other
OS: Linux
Status: NEW
Severity: enhancement
Priority: P5
Component: ssh
Assignee: [email protected]
Reporter: [email protected]
ssh_config(5) says:
ProxyCommand
Specifies the command to use to connect to the server.
The com-
mand string extends to the end of the line, and is
executed using
the user's shell `exec' directive to avoid a lingering
shell
process.
Personally, I would find this explanation much more transparent if it
mentioned up front that the ssh command line arguments "destination"
and "-p port" are ignored when ProxyCommand is specified. Perhaps
something like:
ProxyCommand
Specifies the command to use to connect to the server. If
this option is provided then ssh will ignore command line
arguments such as "destination" and "-p port". Instead,
Ssh will run the given command, and will attempt to
communicate with the remote server via the standard input
and output of the command's process. Specifying no proxy
command is equivalent to "ProxyCommand nc host port"
(where "nc" is the "netcat" utility).
The command string extends to the end of the line. The
command is executed using the user's shell `exec'
directive to avoid a lingering shell process. [...]
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