> For the complete documentation index, see [llms.txt](https://docs.plenit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.plenit.com/docs-en/productos/servers/details/networks.md).

# Networks

The network specifications for Servers. To understand each type of network and decide which one to use, go to Server networks in Concepts.

### Comparison of network types

| Feature                | Standard       | VPC                  | Layer 2  | Direct IP             |
| ---------------------- | -------------- | -------------------- | -------- | --------------------- |
| Type (CloudStack)      | Isolated       | VPC                  | Layer 2  | —                     |
| Virtual Router         | Yes            | Yes (shared)         | No       | No                    |
| DNS, DHCP, gateway     | Virtual Router | Virtual Router       | Your VNF | Your VNF              |
| NAT                    | Yes            | Yes                  | No       | No (direct public IP) |
| Firewall               | Virtual Router | Virtual Router       | Your VNF | Your VNF              |
| Multi-tier             | —              | Up to 3 (Super CIDR) | —        | —                     |
| Site-to-Site IPSec VPN | No             | Yes                  | No       | No                    |

### VPN

Available on networks **VPC**.

|                 |                                                                                                      |
| --------------- | ---------------------------------------------------------------------------------------------------- |
| Types           | Site-to-Site IPSec · Remote access                                                                   |
| Negotiation     | IKEv1 · IKEv2 · Auto                                                                                 |
| Auto behavior   | If we initiate the connection, it uses IKEv2; if the other side responds, it adapts to the other end |
| Split tunneling | Requires IKEv2; creates a security association (SA) per remote network                               |

The limits (VPN per gateway, log retention) are in Limits and quotas.

### Firewall

Rules of **inbound**, **outbound** and **Geo-IP** (allow or block by country). In Standard and VPC networks, the Virtual Router applies it; in Layer 2 and Direct IP, your VNF.

### Available VNFs

Network appliances that you deploy and operate yourself:

| VNF          | Provider   |
| ------------ | ---------- |
| FortiGate VM | Fortinet   |
| FireboxV     | WatchGuard |

They are deployed from the Marketplace (see Operating systems and applications).

### Load balancer

|                     |                                          |
| ------------------- | ---------------------------------------- |
| Algorithms          | Round-robin · Least-connections · Source |
| Persistent sessions | Yes (sticky sessions)                    |
| Supported network   | Standard                                 |


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