OpenSSH config example for OS X Yosemite 10.10.x

config-example.sh

brew tap homebrew/dupes
# For OpenSSH 6.9p1 or later
brew install openssh --with-ldns
# NOTE: editing LaunchAgent is no longer supported in HomeBrew
# See https://github.com/Homebrew/homebrew-dupes/pull/482#issuecomment-118994372
# edit LaunchDaemons (as administrator/root)
launchctl unload -w /System/Library/LaunchDaemons/ssh.plist
vi /System/Library/LaunchDaemons/ssh.plist
launchctl load -w /System/Library/LaunchDaemons/ssh.plist
# check sshd_config

socketfilterfw.output.txt

# output of /usr/libexec/ApplicationFirewall/socketfilterfw --listapps

ALF: total number of apps = 4

[1,2,3: omitted]

4 :  /usr/local/Cellar/openssh/6.6p1_1/sbin/sshd
 	 ( Allow incoming connections )

ssh.plist.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Disabled</key>
	<true/>
	<key>Label</key>
	<string>com.openssh.sshd</string>
	<key>Program</key>
    <string>/usr/local/sbin/sshd</string>
	<key>ProgramArguments</key>
	<array>
        <string>/usr/local/sbin/sshd</string>
		<string>-i</string>
	</array>
	<key>Sockets</key>
	<dict>
		<key>Listeners</key>
		<dict>
			<key>SockServiceName</key>
			<string>ssh</string>
			<key>Bonjour</key>
			<array>
				<string>ssh</string>
				<string>sftp-ssh</string>
			</array>
		</dict>
	</dict>
	<key>inetdCompatibility</key>
	<dict>
		<key>Wait</key>
		<false/>
	</dict>
	<key>StandardErrorPath</key>
	<string>/dev/null</string>
	<key>SHAuthorizationRight</key>
	<string>system.preferences</string>
	<key>POSIXSpawnType</key>
	<string>Interactive</string>
</dict>
</plist>