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This article describes how to configure various networking options.

Configuring a custom server

In some rare cases it might be necessary to specify a certain server to which the client should connect to.

To specify a server:

1. Click on Preferences in the main window.
2. Click on Advanced.
3. Click on the edit button Image Removednext to the Server field.
4. Enter the URL of the server you wish to connect to.
5. Click on OK.

Configuring bandwidth limits

It's possible to restrict the actual bandwidth, the client will be using for its transfers. Furthermore the client makes a distinction between LAN and internet bandwidth, to have more flexibility.

Setting an internet bandwidth limit

To set an internet bandwidth limit:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Select a suitable profile from the Internet speed dropdown box or choose Custom to enter custom values.

 Default: Unlimited

  Auto-detect performs a periodic file upload and download with on the central server to judge on optimal connection speeds.

Setting an internet bandwidth limit

To set an internet bandwidth limit:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Select a suitable profile from the LAN speed dropdown box or choose Custom to enter custom values.

 Default: Unlimited

Configuring the connection behaviour

The client offers synchronization over local area network (LAN), internet and/or a custom server. It's possible to configure three types of networking modes in the client:

• LAN and Internet 
• Server only
• LAN only

The networking mode controls the (re-)connection behaviour:

 LAN and Internet is the default setting and recommended for most usecases.

To configure the connection behaviour:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Select a networking mode from the Connect to dropdown box.

Modifying the LAN IP list

To define, edit or remove IPs and IP ranges considered to be on the local area network:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Use the add Image Removed, edit Image Removedor delete Image Removedbuttons to make changes to the list.

Configuring the disconnected behaviour

If the client looses the connection to the server, it may not be possible to check for permissions other members have on certain folders. Since the client may have one or more connections to other clients, it's possible to decide if the synchronization should continue or stop.

To configure the behavior when the client is disconnected from the server:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Select the intended behaviour from the Disconnected behaviour dropdown box.

Configuring network interfaces and ports

It's possible make the client listen for connections on a specific network interface and ports, tough we recommend to use the defaults.

To listen on a specific network interface:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Select the network interface the client should listen on from the Network interface dropdown box.

To change the network port for incoming connections:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Uncheck the Detect a suitable port automatically checkbox.
5. Specify the desired port in the Data port field.

Using relayed transfers

This feature makes it possible to use the client without configuring your router and firewall, but requires a connection to a server. Both devices need to have relayed connection activated to make it work. Most routers and firewalls allow outgoing connections and responses from the device which was contacted. A relayed connection is established from both sides to the server. The server connects both devices making it possible to transfer data even if no incoming connections are allowed on the default or configured data port.

 Relayed connections are enabled by default.

To disable relayed connections:

1. Enable the Expert Mode.
2. Click on Preferences in the main window.
3. Click on Network.
4. Uncheck the Enabled relayed transfers checkbox.

Using UDT transfers

 This feature is described in an extra article about using UDT connections.