Hello,
If you set the LAN ports based on this article: http://help.hotspotsystem.com/knowledgebase/offer-hotspot-service-via-the-lan-ports-wired-connection then you won’t get the router on LAN since it gives the hotspot on LAN (else every user getting the hotspot from there could access your router). If you disconnect the internet, you can connect however. (If you haven’t touched the IP address of LAN port)
You can set remote administration to be able to reach the router from WAN also. Check System > Administration if it accepts SSH from all ports. If yes, go to Network > Firewall and make sure the WAN > record shows ACCEPT ACCEPT DROP, defining that it will accept inbound connections originated outbound.
Steve