Seems you are using Rdesktop from Whonix to a Window machine
Firewall port is closed? Server doesn’t accept Tor?
Not everyone knows how to resolve this as it deals with a client not integrated in Whonix by default (rdesktop) with a Windows protocol (RDP) and with networking configuration (connection reset by peer).
If I don’t reply on your following post, I don’t have nothing to contribute or help you as I don’t know much about this, not that I ignored it.