5 min read · Intermediate · Related: Managed IT Services

Updated October 2026 · Tampa Bay–tested steps

Connect Two Offices With Site-to-Site VPN

Share files, printers, and phones across locations securely — hardware, failover, and the DNS that makes it seamless.

  1. 1. Use matching business firewalls at both ends

    Same-vendor firewalls (UniFi, Fortinet, Meraki class) with site-to-site IPsec configured. Consumer routers with VPN 'support' deliver consumer reliability — don't.

  2. 2. Plan subnets so they don't collide

    Office A on 192.168.10.x, Office B on 192.168.20.x — different subnets or routing fails mysteriously. Document the scheme; future-you expands to site three painlessly.

  3. 3. Route DNS and test like a user

    Point each site's DNS to resolve the other's names, then test file shares, printing, and calls from a normal workstation. Admin-ping success means nothing if users can't print.

Connect Two Offices With Site-to-Site VPN — When to Call a Pro

  • Design and build with failover, monitoring, and documentation.
  • SD-WAN when internet quality varies by site.
  • Three-plus sites or cloud integration (Azure/AWS) beyond simple tunnels.
Get help with this(813) 702-3155

Guide FAQ

If everything lives in Microsoft 365, you may not need site-to-site at all — cloud kills the distance. Keep VPN for shared printers, cameras, and legacy servers.
Size for concurrent file work, not headcount — 50–100 Mbps symmetric handles most small-office pairs. Test with real workloads, not speed tests.
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