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How is host name matched in SSH configuration file?
The configuration files contain sections separated by Host specifications, and that section is only applied for hosts that match one of the patterns given in the specification. The matched host name is usually the one given on the command line (see the CanonicalizeHostname option for exceptions).
What are the keywords in SSH _ config ( 5 )?
The originalhost keyword matches against the hostname as it was specified on the command-line. The user keyword matches against the target username on the remote host. The localuser keyword matches against the name of the local user running ssh (1) (this keyword may be useful in system-wide ssh_config files).
When to use canonical keyword in SSH config?
Criteria may be negated by prepending an exclamation mark (‘!’). The canonical keyword matches only when the configuration file is being re-parsed after hostname canonicalization (see the CanonicalizeHostname option). This may be useful to specify conditions that work with canonical host names only.
What are the valid arguments for SSH config?
Valid arguments are any (the default), inet (use IPv4 only), or inet6 (use IPv6 only). BatchMode If set to yes, user interaction such as password prompts and host key confirmation requests will be disabled. This option is useful in scripts and other batch jobs where no user is present to interact with ssh (1).
Where to find match blocks in SSHD config?
So Match blocks need to be at the end of the sshd_config file. I think we should mention the Match and Host key at the same time. Restricts the following declarations (up to the next Host or Match keyword) to be only for those hosts that match one of the patterns given after the keyword.
How to end a match block in OpenSSH?
As you can see, I use a #my stuff comment in custom config files to easily distinguish default configurations from those I made (and I put those at the end of the config files). Now I wanted to append the directive UseDNS no to the configuration (to speed up logins) but OpenSSH said Directive ‘UseDNS’ is not allowed within a Match block.
Where to start in SSH config ( 5 ) file?
Since the first obtained value for each parameter is used, more host-specific declarations should be given near the beginning of the file, and general defaults at the end. The file contains keyword-argument pairs, one per line. Lines starting with ‘#’ and empty lines are interpreted as comments.