Failed Remmina RDP/VNC setup in a firewalled network
On Machine A, I start Remmina (0.8.0) and created a VNC Incoming Connection profile. port 5900 was chosedn, with a username and password. No changes under advanced or SSH. I start the profile and it says "Listening on port 5900 for an incoming VNCI connection..."
On Machine B, I start Remmina and create a VNC profile. I set machineA.local:5900 as the server, enter the username and password and leave everything else as-is. I start the profile and it says "Connecting to 'username@machineA'..."
However this does not connect.
So far I've:
Made sure UFW isn't enabled
Confirmed I can ping and ssh from Machine A to Machine B and vice versa
Tried on other ports
Tried without a username and password
Enable the port 5900 and Machine A IP address on the network firewall
Diagram of setup:
Machine B ubuntu (VNC profile) --->Firewall----> Machine B ubuntu (VNC Incoming connection)
I want to establish an RDP session with another Ubuntu machine but Terminal server client fails with a black session screen and X11VNC fails with too.
Running out of alternatives, has anyone setup an RDP/VNC connection successfully between 2 linux machines and if so how?
Thanks in advance.