Launch Fails with Error: "Cannot connect to the Citrix XenApp Server. Protocol Driver Error."

MBF mode is enabled on ADC

ADC has the support for DTLS with MBF with all the builds for the 12.0/12.1/13.0 series. In the 11.1 series, builds prior to 11.1 52.x doesn’t support DTLS with MBF, and builds starting from 52.x has the support for DTLS with MBF. MBF must be disabled to make DTLS work on builds prior to 11.1 52.x.

Before disabling MBF, be sure that your architecture and configuration on ADC allow you to disabled this feature.

To disable MBF, on your ADC GUI,
1. Go to Configuration > System > Settings
2. Click on Configure Modes. Uncheck MBF. Click OK to validate.


Possible Solution 2:

UDP port 2598 is blocked between ADC SNIP and VDA. If you have a security device, like a firewall between your ADC SNIP and VDA who do not allow UDP on port 2598, this error message will be raised.

Possible Solution 3:

DTLS traffic MTU is lower or greater than 1500. This is a specific issue known by Citrix support. The fix will is available on release 11.1 55.x and 12.0 53.x or higher.

Problem Cause