Hi,
Very new to OPNSense and firewalls in general. Hoping someone can offer their opinion as I'm really confused. If I'm missing anything please let me know.
Legend:
- Modem/router/WAP = ROUTER1
- OPNsense firewall = FW1
- Test PC 1 = PC1
- Test PC 2 = PC2
Version: OPNsense 22.1-amd64
Setup: From my wall socket is connected ROUTER1. Connected directly into the LAN ports on that are FW1 and PC1, and PC2 is connected via WiFi. I only have the LAN port enabled on FW1 right now for config and testing.
Issue: After disabling the DHCP server on ROUTER1 and re-enabling the DHCPv4 service on FW1 I refreshed the IP on PC1 and everything looked fine- my Ethernet interface received all of the correct settings from FW1. I sent a ping to 8.8.8.8 which was successful. I then tried to ping google.com but was not able to resolve the name. After confirming the settings on FW1 were correct I tested PC2 to find it working as expected.
The only difference being PC2 is a wireless client and not plugged directly into ROUTER1.
I am not able to ping FW1 (LAN) from PC1, but I can from PC2. I tried plugging PC1 directly into FW1, but still ping times out. I'm certain I was able to ping FW1 from PC1 at some stage but I can't say for sure. It's usually the first thing I'll do when plugging something new into my LAN.
I've tried going through the settings to make sure I've not enabled/disabled something weird, but I can't find anything. The only config changes I've made are very standard- DNS forward added, DHCPv4 client settings, and ACME client for Let's Encrypt.
Does anyone have any idea what's going on?