I just discovered that a direct tls connection to a windows 7 (=2008r2) rdp 
server indeed fails with 
ERRCONNECT_TLS_CONNECT_FAILED

the error is that there is no cipher match (this probably happens also
with a 2008r2 based rdp gateway server, but that someone would need to
check)

this however can be workarounded by /tls-seclevel:0

If this resolves your issue I would suggest making this the default for
freerdp. If someone from the Ubuntu team is willing to integrate such a
thing I would make a downstream patch for that too..

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to freerdp2 in Ubuntu.
https://bugs.launchpad.net/bugs/1954970

Title:
  remmina "Cannot connect to the RDP server ... via TLS. Check that the
  client and server support a common TLS version"

Status in freerdp2 package in Ubuntu:
  Confirmed
Status in freerdp2 source package in Jammy:
  Confirmed

Bug description:
  Xubuntu Jammy (21.04)
  after upgrade
     libfreerdp-client2-2 (2.3.0+dfsg1-2ubuntu2 => 2.4.1+dfsg1-1)
     libfreerdp2-2 (2.3.0+dfsg1-2ubuntu2 => 2.4.1+dfsg1-1)
  Remmina can't connect to any RDP server (Win2008 R2) with error:
  "Cannot connect to the RDP server ... via TLS. Check that the client and 
server support a common TLS version"

  Rollback to Impish version of libs
     libfreerdp-client2-2 2.3.0+dfsg1-2ubuntu2
     libfreerdp2-2 2.3.0+dfsg1-2ubuntu2
  makes it work normal.

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