User manual

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Is the certificate intended for a purpose other than verifying the identity of the sender and encrypting
server communications? That is, is it the correct type of certificate?
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Has the certificate expired, or is it valid only in the future? That is, is the certificate valid according to
the computer clock?
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Does the common name on the certificate match the host name of the server that sends it? A mismatch
can occur if a load balancer redirects Horizon View Client to a server that has a certificate that does not
match the host name entered in Horizon View Client. Another reason a mismatch can occur is if you
enter an IP address rather than a host name in the client.
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Is the certificate signed by an unknown or untrusted certificate authority (CA)? Self-signed certificates
are one type of untrusted CA.
To pass this check, the certificate's chain of trust must be rooted in the device's local certificate store.
NOTE For instructions about distributing a self-signed root certificate to all Windows client systems in a
domain, see the topic called "Add the Root Certificate to Trusted Root Certification Authorities" in the
VMware Horizon View Installation document.
When you use Horizon View Client to log in to a desktop, if your administrator has allowed it, you can click
Configure SSL to set the certificate checking mode. You have three choices:
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Never connect to untrusted servers. If any of the certificate checks fails, the client cannot connect to the
server. An error message lists the checks that failed.
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Warn before connecting to untrusted servers. If a certificate check fails because the server uses a self-
signed certificate, you can click Continue to ignore the warning. For self-signed certificates, the
certificate name is not required to match the View Connection Server name you entered in
Horizon View Client.
You can also receive a warning if the certificate has expired.
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Do not verify server identity certificates. This setting means that View does not perform any certificate
checking.
If the certificate checking mode is set to Warn, you can still connect to a View Connection Server instance
that uses a self-signed certificate.
If an administrator later installs a security certificate from a trusted certificate authority, so that all certificate
checks pass when you connect, this trusted connection is remembered for that specific server. In the future,
if that server ever presents a self-signed certificate again, the connection fails. After a particular server
presents a fully verifiable certificate, it must always do so.
IMPORTANT If you previously configured your company's client systems to use a specific cipher via GPO,
such as by configuring SSL Cipher Suite Order group policy settings, you must now use a
Horizon View Client 2.3 group policy security setting included in the Horizon View ADM template file. See
“Security Settings for Client GPOs,” on page 33. You can alternatively use the SSLCipherList registry
setting on the client. See “Using the Windows Registry to Configure Horizon View Client,” on page 45.
Chapter 3 Configuring Horizon View Client for End Users
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