### Set IP Addresses for Client Connections IP addresses for incoming client connections for a gateway are specified on the Properties tab of the RAS Secure Client Gateway Properties dialog. RAS Secure Client Gateway recognizes both IPv4 and IPv6. By default, IPv4 is used. You can specify the following IP options: Use IP version: Select the IP version(s) to use. IP(s): Specify one or more IP addresses separated by a semicolon, or click Resolve to resolve the IP address automatically. These are the available addresses on the gateway server. To specify IP addresses that should be used for client connections, use the Bind to IP section (see below). Bind to IP: Use this section to specify on which IP address (or addresses) the gateway will listen for client connections. You can select a specific address or <All available addresses>, in which case all of the IP addresses specified in the IP(s) field will be used. Remove system buffers for: These fields (one for each IP version) can be used when the connection between the gateway and the Parallels Client has a high latency (such as the Internet). This option will optimize traffic for better experience on the Parallels Client side. You can select a specific address, all available addresses, or none. What this option will do is delay the internal socket to match the performance of the external socket. If the internal network is fast and the external is slow, RDP detects the fast internal socket and sends a lot of data. The problem is that this data cannot be sent fast enough from the gateway to the Client, thus ending up with a bad user experience. Enabling this option will optimize the data exchange.