In a duplex overlay area to obtain a conditional use permit the second unit must meet a variety of requirements including being separately metered (unless you are going to pay all utilities) and it must have a 2 hour firewall between the units. 

https://www.mclane.com/thought-leadership/the-delaware-series-limited-liability-company-an-untested-asset-firewall

I opted to get the managed router even thought I always put my own router/firewall in.

No worries about existing relationships, firewalls, 90 day waiting periods, or web site access.

Might be a firewall issue on my side but I wanted to ask.

The LLC provides a liability firewall, and the trust provides some anonymity. 

Use these concepts to decide on the pad width along the outside property lines.Edge- 1 inch dip, to keep out wind blown rain under the door.Pad Length--Fire wall, not tied to office or lived in quarters.

They will require certain firewall standards between units, and other items.

VPN access was working seamless to tunnel through the corporate firewall.

An LLC is a firewall that seperates your assets.