OpenWrt - restrict LuCI and ssh to a specific host

For security, I only ever want to connect to my OpenWrt router from a specific internal host.  Here is the firewall setup to accomplish that.

relevant part of /etc/config/firewall:

# Only allow 192.168.1.6 to access LuCI http

config 'rule'

        option '_name' 'Restrict-LuCI-http'

        option 'src' 'lan'

        option 'src_ip' !192.168.1.6

        option 'dest_ip' 192.168.1.1

        option 'dest_port' 80

        option 'proto' 'tcp'

        option 'target' 'REJECT'

# Only allow 192.168.1.6 to access LuCI https

config 'rule'

        option '_name' 'Restrict-LuCI-https'

        option 'src' 'lan'

        option 'src_ip' !192.168.1.6

        option 'dest_ip' 192.168.1.1

        option 'dest_port' 443

        option 'proto' 'tcp'

        option 'target' 'REJECT'

# Only allow 192.168.1.6 to access ssh

config 'rule'

        option '_name' 'Restrict-ssh'

        option 'src' 'lan'

        option 'src_ip' !192.168.1.6

        option 'dest_ip' 192.168.1.1

        option 'dest_port' 22

        option 'proto' 'tcp'

        option 'target' 'REJECT'