> 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/v19-en-us/parallels-ras-19-administrators-guide/appendix/port-reference/parallels-client.md).

# Parallels Client

<table><thead><tr><th width="112">Source</th><th width="124">Destination</th><th width="114">Protocols</th><th width="105">Ports</th><th>Description</th></tr></thead><tbody><tr><td>Parallels Client</td><td>HALB</td><td><p>TCP, UDP</p><p>TCP, UDP</p></td><td><p>80, 443</p><p>20009</p></td><td><p>Management and user session connections.</p><p>Device Manager shadowing via Firewall (indirect network connection).</p></td></tr><tr><td></td><td>RAS Secure Gateway Forwarding mode</td><td><p>TCP, UDP</p><p>TCP, UDP</p><p>UDP</p></td><td><p>80, 443</p><p>3389</p><p>20000</p></td><td><p>Management and user session connections.</p><p>Optional - Used for user session if RDP load balancing is enabled (Standard RDP).</p><p>Secure Gateway lookup broadcast.</p></td></tr><tr><td></td><td>RAS Secure Gateway Normal mode</td><td><p>TCP, UDP</p><p>TCP, UDP</p><p>TCP, UDP</p><p>UDP</p></td><td><p>80, 443,</p><p>3389</p><p>20009</p><p>20000</p></td><td><p>Management and user session connections.</p><p>Optional - Used for user session if RDP load balancing is enabled (Standard RDP).</p><p>Device Manager shadowing via Firewall (indirect network connection)</p><p>Secure Gateway Lookup Broadcast</p></td></tr><tr><td></td><td>Session host (VDI, RDS, RemotePC)</td><td>TCP, UDP</td><td>3389</td><td>Used for user session connections in Direct Mode only. RDP connection is always encrypted.</td></tr><tr><td></td><td>Azure Virtual Desktop Services</td><td><p>TCP</p><p>UDP</p></td><td><p>443</p><p>3390</p></td><td><p>Azure Virtual Desktop Gateway connection</p><p>Used for user session connections in ShortPath mode only.</p></td></tr><tr><td></td><td>Microsoft site</td><td>TCP</td><td>443</td><td>Download Microsoft Remote Desktop (MSRDC) client</td></tr><tr><td></td><td>Parallels site</td><td>TCP</td><td>80, 443</td><td>Check for updates and download Parallels Client</td></tr></tbody></table>


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