It is possible to isolate an ip (device) by a firewall rule?

Question

Hi, i have a router (tp-link) that doesnt have the wifi isolation option, i use this for "guest" so it is conected to the xg firewall through the same lan port that is my main swich, so i would like to know if its possible to block some functions like "access to network devices" or "list network devices" including my main router. 
 
 main router: 192.168.110.1 
 guest router: 192.168.1.1 (wan: 192.168.110.10 / 255.255.255.0, dhcp 192.168.1.100-199) 
 
 Thanks! 
 
 7701.screencapture-192-168-110-3-4444-webconsole-webpages-index-jsp-2019-06-04-11_43_00.pdf

LuCar Toni · Answer

There is simply no way to resolve this on Gateway level. 
 You would need to place this Router on a separate interface to control this. 
 It is called https://en.wikipedia.org/wiki/Broadcast_domain 
 Maybe you could work with VLAN to separate everything, but your switch has to support this.