> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-admin-guide/parallels-ras-21-administrators-guide/ras-secure-gateway/configuring-a-ras-secure-gateway/set-ip-addresses-for-client-connections.md).

# Set IP addresses for client connections

* **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 Secure 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 Secure 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 Secure 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 Secure Gateway to the Client, thus ending up with a bad user experience. Enabling this option will optimize the data exchange.

You can specify the following IP options:

IP addresses for incoming client connections for a Secure Gateway are specified on the **General** tab of the **RAS Secure Gateway Properties** dialog. RAS Secure Gateway recognizes both IPv4 and IPv6. By default, IPv4 is used.


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