@slightlybeige said in IP address conflict on new install despite changing it?:
The fault I'm more interested in is how changing the interface IP appeared to somehow NOT change the interface IP.
Connecting to an Interface and changing the IP is time critical. I can't test it right, now, but I guess you wind up having a big green Apply button. Ones hitting that, there will be a message that states that pfSense changes LAN settings, and a browser redirect should activate in "20 seconds". After the delay, the GUI should work on 192.168.1.4.
If you connected your new pfSense to early, some of your network devices might have 'sniffed' that another "192.168.1.1" device was present on the network, and things go haywire.
Btw : when starting up a new pfSense, I always activate the console access. Serial if possible, if not keyboard/VGA and by SSH also. Maintenance related to the GUI itself, IP changing, etc, I don't use the browser that, I use the console.