Hello,
Yesterday I installed OPNSense on my Mini PC and updated it to the latest version. Unfortunately, the firewall rule "Default deny / state violation rule" blocks traffic from my server to my laptop and I cannot figure out why. To make this problem even more confusing, not all of my server traffic gets blocked.
OPNsense 23.1.5_4-amd64
FreeBSD 13.1-RELEASE-p7
OpenSSL 1.1.1t 7 Feb 2023
The LAN interface is running on igc1 with a 16 port network switch connected to the port.
Static IPv4: 192.168.0.1/24
DHCP Subnet: 192.168.0.0
Subnet mask: 255.255.255.0
Range: 192.168.0.100 - 192.168.0.199
Both my laptop and server are connected to the switch with a static IP Address.
Laptop IP Address: 192.168.0.100
Server IP Address: 192.168.0.101
The server is running proxmox with two VM's and both have a static IP Address.
Gitlab: 192.168.0.209
Home Assistant: 192.168.0.205
The problem:
Traffic from Gitlab IP Address is being blocked by the firewall.
https://ibb.co/kxc2bWb
The firewall rules have not been changed beyond the defaults.
https://ibb.co/Cm0XkLj
What confuses me is the Home Assistant connection works.
https://ibb.co/QkT6Mnf
At first I thought I messed something up during the installation, so this morning I reinstalled from scratch and didn't configure anything except the DHCP. Plugged in the server and the traffic still gets blocked.
I'm at my wits end here and I have no idea what I'm doing wrong. It seems like a simple configuration issue, but I don't know where to even begin.
Please help?
Thanks!
Inconsistent netmasks?
Turns out my statically provisioned IP Address Proxmox containers were routing requests through the gateway, and because the gateway did not have a corresponding request to match the response, it would drop the connection.
I configured the Proxmox containers to use DHCP and everything is working now.