I have the following composition of devices:

[selfmade router] - ethernet - [WLAN router 1] ----- wlan ------ [WLAN router 2]

WLAN router 2 has 5 ethernet ports, each as an own VLAN, so 5 VLANs. I want to manage the routing and firewalling between those VLANs at selfmade router. What technique would I use to pass the tagged vlan packets from WLAN router 2 to selfmade router?

Could I use a bridge from WLAN router 2 to WLAN router 1 which itself has a bridge from WLAN router 1 to selfmade router or do I have a wrong understanding of a bridge?

Thanks for any hint on this :-)