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A Client Error message will appear as you fail to connect to a horizon desktop:"VDPCONNECT_CONNECT_TLS: The connection to the gateway or the remote computer could not be established because of a TLS error. This could be due to a TLS handshake failure, a certificate check failure or other related errors. If the issue persists, please contact your system administrator."Horizon Client logs and Horizon MKS logs, with the latest cross-platform client release, contain a keyword Blast_Connect_Failure_Alert to aid in expedited failure diagnosis.Log Location: Location of Horizon (VDM) log files (1027744) vmware-mks-<pid>.log 2023-02-24T21:25:24.094Z In(05) blastSocket [BlastSocketClient] BlastSocketClientConnectFailureAlert: Could not connect to Desktop. 2023-02-24T21:25:24.094Z In(05)+ blastSocket Blast_Connect_Failure_Alert: Reason: VDPCONNECT_CONNECT_TLS (31) 2023-02-24T21:25:24.094Z In(05)+ blastSocket Blast_Connect_Failure_Alert: host:X.X.X.X port: 22443 httpProxy:null fqdn:null 2023-02-24T21:25:24.094Z In(05)+ blastSocket Blast_Connect_Failure_Alert: error: 13 detailed: 0 httpStatus: 0 ClientContext:21172896D30 vmware-horizon-viewclient-<nnn>.txt 2023-02-24T13:25:24.212-08:00 WARN (01) [libsdk] : RMKSWindow::OnConnectionStateChanged:2352: Blast_Connect_Failure_Alert: (22FA009D9D0) disconnected with VDPCONNECT_CONNECT_TLS error: 'VDPCONNECT_CONNECT_TLS: The connection to the gateway or the remote computer could not be established because of a TLS error. This could be due to a TLS handshake failure, a certificate check failure or other related errors. If the issue persists, please contact your system administrator.'.
Horizon Endpoints use SSL certification to securely connect and encrypt protocol traffic. An issue in terms of Certificate validation can cause the above error.
The client encounters TLS/SSL negotiation errors while connecting to a peer.Varied reasons exist for this error, which, can include, but is not limited to Certificate expiry, revocation, cipher suite mismatch, SSL offloading misconfiguration
The VDPCONNECT_CONNECT_TLS error typically indicates that a certificate issue is impeding connection. Here are some steps to troubleshoot this error:Narrated Walkthrough of Potential Remediation Steps Clent and Server Side:Client Side - End User Perspective: Do you have general internet or intranet connectivity on the device?Are other corporate resources available and accessible?If you open the Horizon connection URL within a browser, does the SSL padlock show as valid, without error?Within your Horizon client, within the toolbar option, settings, there is a security section - if you toggle the "Certificate Checking Mode" options does it succeed? Sample Screenshot:Troubleshooting Steps for a Horizon Administrator:Please refer to the following articles for detailed guidance to ensure a timely resolution. Connecting to VMware Horizon View desktops with a Horizon Client fails with the error: "An SSL error Occurred" (78372)Configuration of TLS/SSL certificates for Horizon View Connection Servers (89916) Troubleshooting SSL certificate Issues with the VMware Horizon Server or Console (2082408)
This is a child article of Enhanced Horizon Blast Error Codes with Horizon Client 2303 and Later (91013)