Following is assumed:
1. user connects to a remote server without the X11 forwarding -X option (ssh someserver)
2. ForwardX11Trusted is set to no in the /etc/ssh/ssh_config file of the user's system
After the ssh connection is made without the -X option, is it possible to enable the X11 forwarding?
[abcd@someclient ~]$ ssh someserver
Oops, forgot the -X option, how do I enable X11 now? I don't want to disconnect and reconnect using ssh -X.