> For the complete documentation index, see [llms.txt](https://docs.glesys.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.glesys.com/products/connectivity/load-balancer/details/service-description.md).

# Service description

Version 2025.05.14

***

### Regional availability

The product is present in the following locations:

* dc-fbg1 (our Falkenberg DC, Sweden)
* dc-sto1 (our Stockholm DC, Sweden)

### Technical specification

#### General information

| **Customer self-service**       | Yes, managed in the control panel |
| ------------------------------- | --------------------------------- |
| **Protocol(s)**                 | TCP / HTTP                        |
| **Processing of personal data** | Transfer                          |

#### Protocol and port

The Load Balancer establishes connections with its backend servers using the specified protocol and port, allowing it to utilize the protocol's capabilities for traffic management.

* **HTTP protocol (typically port 80 or port 443 if also using TLS):** The Load Balancer forwards HTTP connections to backend servers. Traffic will be forwarded without encryption.
* **TCP protocol:** The Load Balancer connects to backend servers using TCP and forwards TCP payloads without modification, except for encryption and decryption, as configured.

#### HTTP mode – specific features:

| **Sticky sessions**          | Yes                                                                                                                    |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------------- |
| **X-Forwarded-For header**   | Enabled by default                                                                                                     |
| **X-Forwarded-Proto header** | Enabled by default                                                                                                     |
| **TLS/SSL certificates**     | Yes, you can add a certificate to the frontend (no integrated feature for auto-renewing Let's Encrypt certifications). |

#### TCP mode – specific features:

| **Proxy protocol support** | No |
| -------------------------- | -- |

#### Timeout options

The Load Balancer service provides three different types of timeout settings:

1. **Timeout Client** \[set to 30 seconds by default]: The timeout client setting determines the maximum duration of client inactivity allowed when a client is connected to the server.
2. **Timeout Connect** \[set to 4 seconds by default]: The timeout connect is like a grace period that sets the maximum time for a client to connect to a server.
3. **Timeout Response** \[set to 30 seconds by default]: The timeout response, also known as the "timeout server," sets the maximum time to receive HTTP response headers from the backend server after it receives the complete client request.

#### Limits on Load Balancing resources

Each load balancer has the following configuration limits:

* Concurrent sessions: The maximum number of connections that the Load Balancer will accept are, by default, set to 1,000. Maximum value: 200,000.
* One IPv4 address and one IPv6 address.
* No geo-redundancy, private network, Server Name Identification (SNI) or proxy protocol support.

### Responsibilities

| **Infrastructure platform** | Glesys   |
| --------------------------- | -------- |
| **Client setup**            | Customer |
| **Client troubleshooting**  | Customer |