The problem
Two offices may need access to selected servers or shared resources without exposing those services publicly.
Recommended approach
A site-to-site VPN can connect networks while firewall rules control exactly what can pass between them.
Step-by-step checklist
- Document both subnets and avoid overlapping ranges.
- Choose the VPN type supported by both gateways.
- Define encryption and authentication settings.
- Add narrow network rules.
- Test DNS, application ports and failover behavior.
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