In System Event log on the VDA a TDICA event 1019 appears.

"The Citrix TDICA Transport Driver connection from xxx.xxx.xxx.xxx:<random port> to port 443 received an invalid packet during its ?? handshake phase"

There is however no issue launching the session and no disconnection takes place.

In this scenario the user is connecting via a NetScaler Gateway. SSL is also enabled on the VDA itself.

• The event logs entry is the result of an SSL probe from the NetScaler.
• It is only logged in the event that SSL is already enabled on the VDA itself.
• There is no user impact.

Problem Cause