Manual configuration of ports and IP's bricks network, so I have to reinstall via USB
HI all
I'm quite new to networking and I'm having a lot of trouble setting up OPNsense. Heres the situation:
I'm running OPNsense 26.1.6_2 (amd64) on an old lenovo SFF PC with an additional Intel NIC (I made sure only to use intel NIC's). When I install the OS everything works quite fine out of the box. I get a connection to my PC, running windows, via. direct ethernet connection. DHCP does it's thing and the network functions fine.
But. When I try to manually configure the ports (I set motherboard NIC to WAN and added NIC to LAN) and manually set IP-addresses for them, the whole system seemingly breaks down and whenever I try to ping devices - or even the broadcast address for the subnet - I just get the same err: ping: sendto: Network is down.
I have been trying to debug this for hours now and the only fix seems to be using the default settings. Even factory resetting doesn't fix it, so I have to install the OS again through my USB.
Is this a common mistake? It might very well just be me doing something dumb when configuring the ports and addresses. I have said no to all IPv6 stuff and left the address empty, because I want to keep it simple for now.
Please help me if you know what is going on. I'd really like to learn using the terminal, and I can't really do that, if configuring with it ruins the whole OS.
Thanks so much in advance guys! :D
Edit:
I've narrowed the problem down to the IP address I used for my LAN port. I used an arbitrary address from the private space - 10.0.10.1/24 (yes, I chose to subnet it to a smaller subnet, because I don't need all those addresses. For some reason this specific address messes up the whole thing, because other subnets (172.16.0.1/20 and 192.168.1.1/24) work just fine even when manually configuring them.
At this point I just want to find out what was wrong with that address? Did I perhaps mess up in some subnetting rules?