Firewall - Bria Registration

Good morning
We use Bria Solo as our business phone app through Free PBX. We haven't had any issues with "push registration" to the Free PBX server until recently. This is about 7 or 8 accounts, it's random when it happens, but if I disable the Free PBX firewall, all accounts register fine, as they used to WITH the firewall on. I have them logout of Bria and log back in then re enable the firewall on Free PBX and they still register fine, but then a couple hours later, it happens again. They call me, I run through the same process and all is well again for a period of time. Has there been some sort of "update" recently, to the Free PBX server(firewall) that may be causing this new issue? Is there a more permanent setting or work around you can provide us? Very time consuming, trying to keep 7 or 8 phones "registered" as of late. This started a week or two ago. Thank you in advance

Steve Bednar
steve.bednar@richmondtt.com