User manual

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(Full security) Full verication is performed and connections that do not pass full verication are
rejected.
For details about the types of verication checks performed, see “Seing the Certicate Checking Mode for
Horizon Client,” on page 51.
Use the view.sslVerificationMode property to set the default verication mode:
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1 implements Full Verification.
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2 implements Warn If the Connection May Be Insecure.
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3 implements No Verification Performed.
To congure the mode so that end users cannot change the mode, set the view.allowSslVerificationMode
property to "False" in the /etc/vmware/view-mandatory-config le on the client system. See “Horizon
Client Conguration Seings and Command-Line Options,” on page 27.
Configuring Advanced TLS/SSL Options
You can select the security protocols and cryptographic algorithms that are used to encrypt communications
between Horizon Client and Horizon servers or between Horizon Client and the agent in the remote
desktop.
These options are also used to encrypt the USB channel (communication between the USB service daemon
and the agent).
With the default seing, cipher suites use 128- or 256-bit AES, remove anonymous DH algorithms, and then
sort the current cipher list in order of encryption algorithm key length.
By default, TLS v1.0, TLS v1.1, and TLS v1.2 are enabled. SSL v2.0 and v3.0 are not supported.
N If TLS v1.0 and RC4 are disabled, USB redirection does not work when users are connected to
Windows XP desktops. Be aware of the security risk if you choose to make this feature work by enabling
TLS v1.0 and RC4.
If you congure a security protocol for Horizon Client that is not enabled on the View server to which the
client connects, a TLS/SSL error occurs and the connection fails.
I At least one of the protocols that you enable in Horizon Client must also be enabled on the
remote desktop. Otherwise, USB devices cannot be redirected to the remote desktop.
On the client system, you can use either conguration le properties or command-line options for these
seings:
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To use conguration le properties, use the view.sslProtocolString and view.sslCipherString
properties.
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To use command-line conguration options, use the --sslProtocolString and --sslCipherString
options.
For more information, see “Using the Horizon Client Command-Line Interface and Conguration Files,” on
page 26 and look up the property and option names in the table in “Horizon Client Conguration Seings
and Command-Line Options,” on page 27.
Using VMware Horizon Client for Linux
40 VMware, Inc.