Device : D-Link DIR - 853
Firmware : OpenWrt V3 25.12.0
Setup Goal : Wireless Client Bridge to a main router ( 192.168.0.1 ) using the 5Ghz radio.
The Problem :-
I am trying to set up my OpenWrt Router to connect to my main ISP router via Wi-Fi. i have successfully joined the wireless network (wwan) , and the router shows it has internet access. however, i am running into two major issues;
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Access Blocked: While connected to the Openwrt LAN, i cannot access the main router's gateway at 192.168.0.1.
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IP Change Lockout: To avoid a subnet conflict, I am trying to change the OpenWrt LAN IP from 192.168.1.1 to 192.168.2.1. Every time I click Save & Apply, the connection drops. Even when I set a manual IP on my Windows laptop (e.g., 192.168.2.10), I cannot reach the web interface (LuCI) at the new address. It seems to be rolling back to 192.168.1.1 or the DHCP server is failing to start on the new subnet.
What I've tried:
Setting Windows IPv4 manually to 192.168.2.10 with gateway 192.168.2.1.
Changing Firewall zones for wan and lan to ACCEPT before changing the IP.
Performing a hard factory reset multiple times.
Checking ipconfig, which often shows an Autoconfiguration IPv4 (169.254.x.x), suggesting no DHCP response from the router.
Questions:
How can I properly "lock in" the LAN IP change to 192.168.2.1 without the router rolling back?
Is there a specific firewall or routing rule I missed to allow my LAN clients to talk to the 192.168.0.x subnet?
