I have two D-Link AC1200 routers. One is the main, the second is in the boardroom with the LAN cable from the first, to the LAN port into the second. DHCP turned off on the second one. This configures the boardroom DLink as a wireless access point.
When I enable the guest network on the boardroom router, you cannot reach the Internet. Is this because it is designed to get an IP only from its own self? (I have DHCP turned off because it is just an access point).
When I plug the LAN cable into the boardroom DLINK's WAN port instead, turn on DHCP (different subnet), all functions work as normal. However, when you connect to the guest wireless in the boardroom, you can't ping anything on that router, but you *can* ping any IP address on the other network. Connected to guest, I can get onto a computer on the other subnet via the Windows run line: \\192.168.2.100, for example.
The tick boxes for "enable routing between zones" are cleared.
How do I prevent the guest network from seeing other subnets? The main DLink router is a DIR-850L, and the secondary Boardroom router is a DIR-820L