View Agent and Horizon Client use TCP and UDP ports for network access between each other and various View server components.

During installation in Windows clients and remote desktops and RDS hosts, the installer can optionally configure Windows firewall rules to open the ports that are used by default. If you change a default port after installation, you must manually reconfigure Windows firewall rules to allow access on the updated port. See "Replacing Default Ports for View Services" in the View Installation document.

Table 1. TCP and UDP Ports Used by View Agent

Source

Port

Target

Port

Protocol

Description

Horizon Client

*

View Agent

3389

TCP

Microsoft RDP traffic to View desktops if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

9427

TCP

Windows Media MMR redirection and client drive redirection, if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

32111

TCP

USB redirection and time zone synchronization if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

4172

TCP and UDP

PCoIP if PCoIP Secure Gateway is not used.

Note:

Because the source port varies, see the note below this table.

Browser

*

View Agent

22443

TCP

HTML Access if direct connections are used instead of tunnel connections.

Security server, View Connection Server, or Access Point appliance

*

View Agent

3389

TCP

Microsoft RDP traffic to View desktops when tunnel connections are used.

Security server, View Connection Server, or Access Point appliance

*

View Agent

9427

TCP

Windows Media MMR redirection and client drive redirection when tunnel connections are used.

Security server, View Connection Server, or Access Point appliance

*

View Agent

32111

TCP

USB redirection and time zone synchronization when tunnel connections are used.

Security server, View Connection Server, or Access Point appliance

55000

View Agent

4172

UDP

PCoIP (not SALSA20) if PCoIP Secure Gateway is used.

Security server, View Connection Server, or Access Point appliance

*

View Agent

4172

TCP

PCoIP if PCoIP Secure Gateway is used.

Security server, View Connection Server, or Access Point appliance

*

View Agent

22443

TCP

HTML Access if Blast Secure Gateway is used.

View Agent

*

View Connection Server

4001, 4002

TCP

JMS SSL traffic.

View Agent

4172

Horizon Client

*

UDP

PCoIP, if PCoIP Secure Gateway is not used.

Note:

Because the target port varies, see the note below this table.

View Agent

4172

View Connection Server, security server, or Access Point appliance

55000

UDP

PCoIP (not SALSA20) if PCoIP Secure Gateway is used.

Note:

The UDP port number that agents use for PCoIP might change. If port 50002 is in use, the agent will pick 50003. If port 50003 is in use, the agent will pick port 50004, and so on. You must configure firewalls with ANY where an asterisk (*) is listed in the table.

Table 2. TCP and UDP Ports Used by Horizon Client

Source

Port

Target

Port

Protocol

Description

Horizon Client

*

View Connection Server, security server, or Access Point appliance

443

TCP

HTTPS for logging in to View. (This port is also used for tunnelling when tunnel connections are used.)

Horizon Client

*

View Agent

3389

TCP

Microsoft RDP traffic to View desktops if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

9427

TCP

Windows Media MMR redirection and client drive redirection, if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

32111

TCP

USB redirection and time zone synchronization if direct connections are used instead of tunnel connections.

Horizon Client

*

View Agent

4172

TCP and UDP

PCoIP if PCoIP Secure Gateway is not used.

Note:

Because the source port varies, see the note below this table.

Horizon Client

*

View Connection Server, security server, or Access Point appliance

4172

TCP and UDP

PCoIP (not SALSA20) if PCoIP Secure Gateway is used.

Note:

Because the source port varies, see the note below this table.

View Agent

4172

Horizon Client

*

UDP

PCoIP if PCoIP Secure Gateway is not used.

Note:

Because the target port varies, see the note below this table.

Security server, View Connection Server, or Access Point appliance

4172

Horizon Client

*

UDP

PCoIP (not SALSA20) if PCoIP Secure Gateway is used.

Note:

Because the target port varies, see the note below this table.

Note:

The UDP port number that clients use for PCoIP might change. If port 50002 is in use, the client will pick 50003. If port 50003 is in use, the client will pick port 50004, and so on. You must configure firewalls with ANY where an asterisk (*) is listed in the table.