I just installed OPNsense for the first time on a dedicated small form factor PC. After getting both WAN and LAN ports configured, it looked like everything was working from the console's point of view, but, I am finding that the majority of normal sites are being blocked. Zerohedge and Yahoo work perfectly but YouTube, eBay, and most other sites timeout attempting to load. Also, my IP phone (Ooma) won't connect either.
Details:
- The OPNsense firewall PC is between my Cisco router (LAN) and the cable modem (WAN).
- The Cisco router (Manages the full local LAN) and uses a PiHole server for DNS filtering. All DNS request go through PiHole.
- FYI, PiHole has been in use for many years now with no issues.
- I have not added any filters or rules, just whatever is included in the default install.
Any help is appreciated. I've had to bypass the firewall until I can figure this problem out.