About 2 weeks ago we started experiencing frequent brief disconnects when accessing our environment through our RD GW farm. If we connect over a VPN to the host server we do not experience the disconnects.
The farm is 2 servers using NLB running the RDGW, RDWeb, and RD Connection Broker roles (in High Availability Mode with a separate SQL server running a database). All servers are 2012R2. Everything was working fine for about 3-4 months.
Looking through the logs I have only found these warnings, but have not been able to find information on them to see if they are the cause of the disconnects:
RDP_TCP: An error was encountered when transitioning from StatePreparingX224CC in response to Event_ERROR_SendingX224CC (error code 0x0).
I am at a loss of where to look next. Nothing has changed in the environment from when it was working without the frequent disconnects. The only thing that has changed is the addition of a couple of Session Collections, but I do not see how that would affect previously working Session Collections.
James Right Size Solutions