We have a simple network (1 DC, 2 member servers, a database server (db1), an onsite failover (db2) and some 20 clients) on the 192.168.245.0/24 range, linked to the internet via a Watchguard Firebox X Core.
For failover reasons, we are installing a database server (db3) with our files and SQL database in a datacenter. The IP range in the DC is 10.0.1.0/24 .
In the DC, there's also a Watchguard Firebox and there's a VPN link between both.
My issue is that I want to include the db3 into my on-site domain.
How can I do that? I already made it a member while it was on the 192.168.245.x range and then changed the IP address to 10.0.1.2, but the db3 cannot reach the domain, even though there is IP connectivity (SMB/PING/...)