Source

Destination

Protocols

Ports

Description

Parallels Client

HALB

TCP, UDP

TCP, UDP

80, 443

20009

Management and user session connections.

Device Manager shadowing via Firewall (indirect network connection).

RAS Secure Client Gateway Forwarding mode

TCP, UDP

TCP, UDP

UDP

80, 443

3389

20000

Management and user session connections.

Optional - Used for user session if RDP load balancing is enabled (Standard RDP).

Secure Client Gateway lookup broadcast.

RAS Secure Client Gateway Normal mode

TCP, UDP

TCP, UDP

TCP, UDP

UDP

80, 443,

3389

20009

20000

Management and user session connections.

Optional - Used for user session if RDP load balancing is enabled (Standard RDP).

Device Manager shadowing via Firewall (indirect network connection)

Secure Client Gateway Lookup Broadcast

Session host (VDI, RDS, RemotePC)

TCP, UDP

3389

Used for user session connections in Direct Mode only. RDP connection is always encrypted.

Azure Virtual Desktop Services

TCP

UDP

443

3390

Azure Virtual Desktop Gateway connection

Used for user session connections in ShortPath mode only.

Microsoft site

TCP

443

Download Microsoft Remote Desktop (MSRDC) client

Parallels site

TCP

80, 443

Check for updates and download Parallels Client