xfreerdp

xfreerdp /u:USER /p:PASSWD /cert:WHATEVER /v:IP_ATTACK /DIR
# example
xfreerdp /u:admin /p:password /cert:ignore /v:10.10.206.165 /workarea

Note

If you get this error: [ERROR][com.freerdp.core] - transport_connect_tls:freerdp_set_last_error_ex ERRCONNECT_TLS_CONNECT_FAILED [0x00020008], try to use Remmina instead

Remmina

Run it with remmina

Click on + at top left

If you want to make it Windows 7 compatible, click on Advanced and set TLS Security Level to 0:

Also select Use client resolution to see at full window (like Vbox Guests):

rdesktop

rdesktop IP_ATTACK