When setting the Port configuration in a configuration file that is included via Include keyword and when this is not the first included file, the default port 22 is not overwritten.


Example:

$ cat main.conf 
Include /path/to/sub1.conf
Include /path/to/sub2.conf

$ cat sub1.conf 
# empty configuration file

$ cat sub2.conf 
Port 42

$ sshd -T -f main.conf | grep -i '^port'
port 22
port 42


In the above example, sshd would listen on port 22 although this was changed by the configuration. When the two Include lines in main.conf are interchanged, the problem does not occur.