RDP client unexpectedly terminate connection

[Alessandro Fachin <alessandro.fachin () gmail com>]

Hi,
yesterday from a windows xp  client in my office I try as usual  connect to
virtual machine (my virtualcenter is w2003). As you can see the client
complete the three way handshake syn syn/ack ack and then the client send a
ConnectionRequest using X.224 protocol and seems that server reply
correctly
http://msdn.microsoft.com/en-us/library/cc240501%28v=prot.20%29.aspx
but after that ConnectionConfirm the client send back a FIN ACK to close
the connection and server quickly close connection with a RST! Why happen
this? Maybe there is something wrong in the information of
ConnectionConfirm?? The first time happened I guess that the number of
active session is reached, but after 30sec I retry and I can successfully
connect to rdp server. Any suggestions about that? I attach the wireshark
sniffed. Thanks all to reply.

Attachment: lastrdpko.pcap
Description:

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