OPN Sense as Edge Router can't SNMP from LAN to Internet

[MrLee]

my apologies if this was answered anywhere, but I couldn't find my specific issue.

I'm attempting to install OPNSense as an edge router between 2 public IP Address Spaces (like an ISP router)
There are a few firewalls on the LAN side of the OPNSense.

I'm using OPNSense to block access to my "LAN" devices from known bad IP lists (TOR/CI Army, etc.)

I'm using Floating rules and it is working fine in this manner,

I have a few devices that I monitor on the internet via SNMP, and I cannot reach them. 

is it possibly a default rule blocking SNMP out to the internet, and is there a way to override this?
or maybe it's double NAT

[Patrick M. Hausen]

is it possibly a default rule blocking SNMP out to the internet

No.

or maybe it's double NAT

If you use OPNsense as a data centre firewall with only public addresses you should disable NAT entirely, IMHO.

[MrLee]

will the block rules still work?

that's my main reason for switching from the router I had.

[Patrick M. Hausen]

will the block rules still work?

Block rules and allow rules work entirely independent from NAT like in any decent firewall.

[MrLee]

I will try during off hours tonight.

thanks for the advice.