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Update Networking/Sophos/IPSec Site-to-Site VPN Tunnel.md

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Nicole Rappe
2024-01-26 18:16:14 -07:00
parent c258df0cd8
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Networking/Sophos/IPSec Site-to-Site VPN Tunnel.md
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@ -39,17 +39,22 @@ Navigate to "**Configure > Site-to-Site VPN > Add**"
!!! tip "Best Practices - Initiators / Responders"
If you have a hub-and-spoke network, where one location acts as a central authority (e.g. domain controllers, auth servers, identity providers, headquarters, etc), you will set up the central "hub" as a VPN responder on its side of the VPN tunnel, and all the remote "spoke" locations would behave as VPN initiators.
!!! note "Tunnel IDs / Subnets"
If one side of the tunnel indicates a Local ID, you need to input that as the Remote ID on the other end of the tunnel. While Tunnel IDs are generally optional, if one side uses them, both need to.
- "Route-Based" VPNs do not need subnets indicated / configured
- "Policy-based" VPNs require subnets indicated / configured
## Configure IPSec Encryption Profile
Navigate to "**System > Profiles > IPSec Profiles > Custom_IKEv2_`<Initiator>/<Responder>`**"
| **Field** | **Value** |
| :--- | :--- |
| Listening Interface | `<WAN Interface / Generally "Port2">` (*Internal IP Address*) |
| Gateway Address | `<Public IP of Remote Firewall>` |
| Local ID Type | `IP Address` |
| Remote ID Type | `<If the Remote Firewall has one, enter it, otherwise leave blank>` |
| Local Subnet | `<Leave Blank>` |
| Remote Subnet | `<Leave Blank>` |
| Phase 1 Lifetime | `<Longer Lifetime Compared to Phase 2>` (*If Initiator*) |
| Phase 2 Lifetime | `<Shorter Lifetime Compared to Phase 1>` (*If Initiator*) |
!!! warning "Remote / Local Phase Lifetimes"
Within the context of the remote and local VPN tunnels, the lifetime of the Phase 1 and Phase 2 encryption keys needs to be shorter on the intiator than the responder sides of the VPN tunnel.
## Connect the IPSec tunnels
Now you need to start the tunnel on the Initiator side first, then start the tunnel on the responder side. If both sides show green status indicators, the tunnel should be active.