Intranet VPN
Site-to-site links between networks owned by the same organisation.
How widely is it used?
Common in production todayCommon in multi-site enterprises, now usually delivered through SD-WAN.
How it works
Structurally a site-to-site VPN, but every endpoint belongs to one company, so a single addressing plan, routing policy and trust domain can span all of them.
Connects
Organisation network → organisation network
Protocols
IPsec, MPLS, SD-WAN
Typical users
Enterprises
Main use case
One private network spanning every company location.
Advantages
- Unified addressing and routing
- Central policy across sites
Limitations
- Grows complex as sites multiply
- MPLS transport is not encrypted by itself