Firewall causing trouble in double NAT setup

[Heliox]

Hello,

I am trying to run OPNsense virtualised in Proxmox with limited success.

Problem

• Once the firewall is enabled the internet access on WAN stops working and likewise OPNsense is not accessible from WAN-side.
• LAN interface DHCP works, but no internet access and not able to ping 192.168.0.1. In general there's no routing from LAN -> WAN 

Double NAT setup configuration

1) OPNsense gets a static ip from ISP router (192.168.0.0/24) with IP 192.168.0.2 on the WAN interface. DMZ is enabled for this IP.
2) OPNsense runs DHCP 192.168.3.0/24 for virtualised clients in Proxmox and physical clients connected either by cable or wifi.

Visualised here: https://i.ibb.co/ctwtrP6/Setup.png (nb. proxmox 7.3)

Interface overview:
WAN - https://ibb.co/xgqmyWd - Block bogon networks and Block private networks disabled.
LAN - https://ibb.co/LZXkPMT

Firewall:
WAN - https://ibb.co/7p8FXnko
LAN - https://ibb.co/rxtCTJj

Other:
Gateway - https://ibb.co/cyGNTSs
Routes - https://ibb.co/R75hDtH
NAT - default settings.
Loopback - default settings.
Unbound DNS - enabled, default settings.


Any information missing?

[bartjsmit]

Interfaces, WAN, Block private networks

untick and apply

[Heliox]

Already unticked - https://ibb.co/vwhn40B

[Heliox]

So, well. It was a problem with "block private networks". Despite being unticked during the wizard installation, they were still  In interfaces wan i had to tick them, apply and then untick them and apply again. Now everythign works as expected.

// close thread.